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	<title>backdoor &#8211; WordPress Security Blog</title>
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<site xmlns="com-wordpress:feed-additions:1">226935356</site>	<item>
		<title>Why is it compromised even though the plug-ins are up-to-date &#8211; vulnerability created by &#8220;obsolete plug-ins&#8221;?</title>
		<link>https://blog.website-malware-removal.com/10786</link>
		
		<dc:creator><![CDATA[wpdoctoradmin]]></dc:creator>
		<pubDate>Mon, 23 Mar 2026 01:49:47 +0000</pubDate>
				<category><![CDATA[WordPress Security]]></category>
		<category><![CDATA[backdoor]]></category>
		<category><![CDATA[check]]></category>
		<category><![CDATA[database]]></category>
		<category><![CDATA[hacked]]></category>
		<category><![CDATA[malware]]></category>
		<category><![CDATA[plugin]]></category>
		<category><![CDATA[removal]]></category>
		<category><![CDATA[scan]]></category>
		<category><![CDATA[security]]></category>
		<guid isPermaLink="false">https://blog.website-malware-removal.com/?p=10786</guid>

					<description><![CDATA[We will explain why plug-ins can be compromised even if they are up-to-date &#8211; vulnerabilities created by &#8220;obsolete plug-ins&#8221; based on the attack patterns we have detected. There is a possibility of malware infection even though all plug-ins are up-to-date! Even if all plug-ins are up-to-date, you may be infected with malware through other sites on the server, or through vulnerabilities in obsolete plug-ins (which are not updated). In this article, we will explain the dangers of obsolete plug-ins. Obsolete plug-ins are not updated and appear to be up-to-date from the plugin management screen. Even if you are using WordPress and update your plugins for security reasons, they may appear to be up-to-date in the plugin management screen, even though they are no longer under development by their creator and have not been updated for a long period of time. (The official wordpres.org site has also stopped distributing the plugin, so automatic updates will not be applied). If such a plugin is installed on a site and a major vulnerability is discovered, the vulnerability will be left in place for a long time afterwards, increasing the likelihood that it will one day be hacked by hackers. (Although rare, plugins with a large number of installations may be subject to emergency security updates by wordpress.org or volunteers.) The following are examples of suspended plugins that we have detected as targets of hacker attacks 1. MyPixs (version 0.3 or lower) CVE: CVE-2015-1000012 Type: LFI (local file inclusion) Severity: CVSS 7.5 (High) Typical WPScan LFI vulnerability in downloadpage.php where the value of $_REQUEST[&#8220;url&#8221;] is directly passed to include(), which reads arbitrary files on the server without authentication. wp-config.php and other confidential files. No patch and development has been stopped, so immediate removal is recommended. 2. Phee&#8217;s LinkPreview (version 1.6.7 and below) CVE: CVE-2024-13464 (XSS), CVE-2025-27344 (CSRF) Type: XSS CSRF Severity: CVSS 4.3 (Medium) XSS (CVE-2024-13464) and CSRF (CVE-2025-27344) have been reported, both of which are in SolidWP status with no patch available. CSRF is a Patchstack that may allow attackers to force highly privileged users to perform unintended operations. Patchstack, a relatively new vulnerability (reported in 2024-2025), which is still left unfixed at this time. 3. WP Mobile Detector (version 3.5 and below) CVE: CVE-2016-4833 Type: Arbitrary file upload → RCE (remote code execution) Severity: Critical Astra Security can remotely upload arbitrary files to a web server by exploiting the resize.php script, allowing it to function as a web shell (backdoor) and hijack the server. CISA has also issued an advisory CISA. 4. Site Import (version 1.0.1 or lower) Type: RFI (remote file inclusion) + LFI (local file inclusion) AcunetixRFI vulnerability that allows an attacker to include and execute external malicious PHP files due to insufficient input value validation for the url parameter in admin/page.php. PoC (proof-of-concept code) is also available, which allows remote shell upload and Exploit-DB, which has been proven to both upload remote shells and read local files via directory traversal; no patch to fix and removed from official repositories. Prevents vulnerability attacks on deprecated plugins. The only way to prevent vulnerability [&#8230;]]]></description>
		
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">10786</post-id>	</item>
		<item>
		<title>We will explain the dangers of using illegally distributed plug-ins and themes.</title>
		<link>https://blog.website-malware-removal.com/10709</link>
		
		<dc:creator><![CDATA[wpdoctoradmin]]></dc:creator>
		<pubDate>Wed, 21 Jan 2026 01:11:23 +0000</pubDate>
				<category><![CDATA[WordPress Security]]></category>
		<category><![CDATA[backdoor]]></category>
		<category><![CDATA[check]]></category>
		<category><![CDATA[free]]></category>
		<category><![CDATA[malware]]></category>
		<category><![CDATA[plugin]]></category>
		<category><![CDATA[removal]]></category>
		<category><![CDATA[scan]]></category>
		<category><![CDATA[security]]></category>
		<category><![CDATA[virus]]></category>
		<guid isPermaLink="false">https://blog.website-malware-removal.com/?p=10709</guid>

					<description><![CDATA[We will explain why nulled (illegally distributed) WordPress themes/plugins are dangerous. What is a nulled theme/plugin? There are many sites that host and distribute various paid WordPress themes and plugins, or programs that have been removed from the official directory or suspended from distribution, without permission, such as by removing the license certificate. Such unauthorized distribution from sites that are not official distribution sites (especially programs that have had their licenses removed) is called nulled themes and plugins. (Nulled themes and plug-ins may contain malware or backdoors. In addition to programs that bypass the license authorization process, nulled themes and plug-ins may, although not 100% of the time, contain backdoors, which are portals that allow hackers to modify server data. For this reason, it is safer not to use nulled themes or plug-ins. Some specific examples of how malware can be included are listed below. eval(base64_decode($code)); eval(gzinflate(str_rot13(base64_decode('Sy1LzNFQy8xLVShJLEnV...')))) ; base64_decode gzinflate hides (obfuscates) the contents of the malicious code and executes arbitrary code with eval(). The reality is a backdoor. add_action('*****', function() { if (!username_exists('support')) { wp_******_user('support', 'P@ssw0rd!', 'support@example.com'); } }); Generates an invalid user (some of the code has been withheld because it is dangerous) function theme_license_check() { $data = file_get_contents('hacker site'); As shown above, some code disguised as a license can be used to notify an unauthorized destination of its own existence, or to pull down and execute unauthorized code. Unknowingly using a nulled (illegally distributed) theme/plugin If you have outsourced the creation of your site, the production company you outsourced to may have used a nulled theme/plugin. This often leads to hackers attacking your site and spreading malware throughout the site. To some extent, malicious code in nulled themes and plugins can be detected by malware scanning plugins. We recommend that you run a malware scan once your site has been delivered by an outsourced vendor. Free WordPress:Malware Scan &#038; Security Plugin [Malware and Virus Detection and Removal].]]></description>
		
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">10709</post-id>	</item>
		<item>
		<title>I&#8217;ll explain exactly what happens if you don&#8217;t update WordPress.</title>
		<link>https://blog.website-malware-removal.com/10704</link>
		
		<dc:creator><![CDATA[wpdoctoradmin]]></dc:creator>
		<pubDate>Thu, 15 Jan 2026 01:33:17 +0000</pubDate>
				<category><![CDATA[WordPress Security]]></category>
		<category><![CDATA[backdoor]]></category>
		<category><![CDATA[check]]></category>
		<category><![CDATA[database]]></category>
		<category><![CDATA[hacked]]></category>
		<category><![CDATA[plugin]]></category>
		<category><![CDATA[security]]></category>
		<guid isPermaLink="false">https://blog.website-malware-removal.com/?p=10704</guid>

					<description><![CDATA[People say it&#8217;s dangerous not to update your WordPress&#8230; I&#8217;ll explain exactly what happens if you don&#8217;t update your WordPress. Why updating WordPress itself and plugins is important for security If you run a WordPress site, you are often told that updates are important for security. This is simply because updates often close vulnerabilities that are exploited by the program&#8217;s creators. The following is an explanation of how a site that is not updated can be hacked. 1 A vulnerability is discovered that could very easily allow an unauthorized file to be uploaded onto the server or a database to be rewritten. About 10 to 20 such vulnerabilities are discovered each year, and the information is made public to alert the public. However, it is also a double-edged sword, as many hackers use this public information to study how to exploit the vulnerabilities and hack. Hackers themselves sometimes discover major vulnerabilities that no one else is aware of before others do. Such vulnerabilities are called 0-day vulnerabilities. However, sooner or later, vulnerabilities that are used will be exposed by someone through server logs, etc., and shared as public information. 2 When a vulnerability is disclosed, the creator of the plugin, etc., patches the vulnerability to close it and releases an update In most cases, the vulnerable plug-in producer is notified of the vulnerability and releases a new version of the plug-in with a patch to close the vulnerability. 3 Hackers create tools to attack vulnerabilities and attack a vast number of WordPress sites one after another! Hackers obtain a huge list of WordPress sites from search engines and other information, develop a program that automatically attacks vulnerabilities found in 1 and notifies them if the hack is successful, attack hundreds of thousands of sites one after another, and repeatedly gain unauthorized access to the sites with the mindset that success is a blessing. If they succeed, they are satisfied. 4 Successful attack on your site&#8217;s vulnerability by chance If you do not update your site, the vulnerability will be left unattended on your site and will one day be hit by a hacker who will automatically attack a vast number of sites one after another. The hacker will be notified of a successful attack, and a more dangerous backdoor, a malicious program, will be installed on your server. 5 Hackers perform various hacking activities on the successfully attacked site Hackers can perform a wide variety of activities on a site after a successful vulnerability attack, such as generating a large number of malicious pages, creating users with illegal administrator privileges, altering the theme to misdirect visitors to another site, and using the site as a source of spam mail. At this point, it often becomes apparent to the site operator that the site has been tampered with. 60% to 70% of sites that are hacked are due to plugin vulnerabilities. It is said that 60-70% of sites are hacked due to vulnerabilities in plug-ins (the next most common cause is the hijacking of administrator privileges due to weak passwords). It is very [&#8230;]]]></description>
		
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">10704</post-id>	</item>
		<item>
		<title>Why Backup Restores Are Dangerous After WordPress Tampering</title>
		<link>https://blog.website-malware-removal.com/10681</link>
		
		<dc:creator><![CDATA[wpdoctoradmin]]></dc:creator>
		<pubDate>Mon, 22 Dec 2025 01:32:19 +0000</pubDate>
				<category><![CDATA[WordPress Security]]></category>
		<category><![CDATA[backdoor]]></category>
		<category><![CDATA[check]]></category>
		<category><![CDATA[free]]></category>
		<category><![CDATA[malware]]></category>
		<category><![CDATA[plugin]]></category>
		<category><![CDATA[removal]]></category>
		<category><![CDATA[scan]]></category>
		<category><![CDATA[security]]></category>
		<category><![CDATA[virus]]></category>
		<guid isPermaLink="false">https://blog.website-malware-removal.com/?p=10681</guid>

					<description><![CDATA[After WordPress has been tampered with, we explain why backups are dangerous. Why reinfection is repeated after restoring a site from backup? Restoring a defaced WordPress site from a backup may temporarily restore the site and make it appear that the malware symptoms have disappeared. This section explains the causes and countermeasures. 1 Malware has not disappeared If, at the time of backup, there was already a file of a type known as a backdoor, which is an entry point for hackers, that file has been restored as well. This may have caused the hacker to repeat the tampering again via that file. Also, if the file is restored by overwriting it from a backup, the type of malware that infects the legitimate file is removed from the server as is, but exists on its own. Countermeasure: When restoring from a backup, it is necessary to carefully examine whether or not there is any malware infection at the time of the backup. 2 The login password has fallen into the hands of a hacker or an unauthorized user has been registered. If a hacker already knows the login password for the site, or if an unauthorized user has been registered on the site, the hacker may be able to log in to the administration panel and continue to alter files on the server, install backdoors, add unauthorized plug-ins, etc. If a hacker is already registered on your site, he or she will be able to log in to your site. Countermeasure: Changing the password for administrative privileges and removing unauthorized users are effective countermeasures. 3 Process is infected with malware. If a server process (not a file, but a form of malware that keeps running in memory) is infected with malware, it cannot be erased even if restored from a backup site. Countermeasure: It is necessary to investigate whether any malware continues to run on the server process and stop the malicious process if it exists. Reference Word How to stop and detect malware residing in a process in WordPress How to check if malware is deployed in a process (memory) on a WordPress site 4 Vulnerabilities can also be restored Restoring a site from a backup can restore the vulnerabilities in the site that allowed the hacker to get into the site in the first place. If you restore from a backup, we recommend that you also take measures to plug the vulnerabilities, such as updating plugins and WordPress itself. 5 The site has been reinfected via another site on the server. Many malware nowadays spread infection via another site on the server (a site that shares the root folder), going beyond the site folder for each domain. For this reason, it is advisable to perform malware scanning and vulnerability countermeasures on all sites on the server, not just those that are showing symptoms of malware. We hope you will take advantage of this free plugin developed by WP Doctor, which allows you to perform malware scanning and vulnerability scanning. Free] WordPress: Malware Scan &#038; Security Plug-in [Malware and Virus Detection [&#8230;]]]></description>
		
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">10681</post-id>	</item>
		<item>
		<title>How to deal with unauthorized plugins installed in wordpress such as wp-cleansong, wp-cache, optimize-core, system.php, etc.</title>
		<link>https://blog.website-malware-removal.com/10670</link>
		
		<dc:creator><![CDATA[wpdoctoradmin]]></dc:creator>
		<pubDate>Mon, 15 Dec 2025 01:52:21 +0000</pubDate>
				<category><![CDATA[WordPress Security]]></category>
		<category><![CDATA[backdoor]]></category>
		<category><![CDATA[check]]></category>
		<category><![CDATA[clean]]></category>
		<category><![CDATA[database]]></category>
		<category><![CDATA[free]]></category>
		<category><![CDATA[malware]]></category>
		<category><![CDATA[plugin]]></category>
		<category><![CDATA[removal]]></category>
		<category><![CDATA[scan]]></category>
		<category><![CDATA[security]]></category>
		<category><![CDATA[virus]]></category>
		<guid isPermaLink="false">https://blog.website-malware-removal.com/?p=10670</guid>

					<description><![CDATA[Hackers may install malicious plugins (wp-cleansong, wp-cache, optimize-core, system.php, etc.) once they have successfully infiltrated a WordPress site. This section describes how to deal with the installation of such unauthorized plug-ins. Rogue plug-ins introduced by hackers Once hackers have successfully infiltrated a WordPress site, they may install a type of malicious program called a backdoor in the server to facilitate various subsequent unauthorized activities on the server, such as tampering or sending spam emails. This backdoor may take the form of a plugin that runs on WordPress and may be installed and activated unknowingly. There are also attacks that use a legitimate PHP-running plugin plus malicious code to write to the database. Reference WPCode &#8211; Malware embedded in database via Insert Headers and Footers plugin How to tell if a plugin is malicious Malicious plug-ins may masquerade as security plug-ins, update plug-ins, etc., in order to appear harmless. If you see a suspicious plugin in the list of plugins in the WordPress administration screen, you can use the following methods to identify the plugin to some extent. 1 Plug-in does not exist on the official WordPress website WordPress plug-ins are listed on the official WordPress website according to the following rules. https://wordpress.org/plugins/"Slug"/ *Slug is the name of the plugin folder in wp-content/plugins. If a plugin is not listed as an official plugin and you do not remember installing it, it may be a rogue plugin installed by a hacker. 2 Code is obfuscated Hackers often obfuscate the code to hide the original function of the malicious code. If you download and open the code of a plugin using FTP software and find obfuscated code such as the following, it may be a malicious plugin installed by a hacker. 3 There is a file in the plugin folder that is judged as malicious code by the malware scan. Free WordPress:Malware Scan &#038; Security Plug-in [Malware and Virus Detection and Removal] If there are files in the plugin folder that are detected as malware by malware scanning plugins such as [Free] WordPress:Malware Scanning &#038; Security Plugins [Malware &#038; Virus Detection &#038; Removal], there is a high possibility that the plugin is a malicious one installed by hackers. How to deal with rogue plug-ins If you are certain that a hacker has introduced a malicious plugin, stop and remove the plugin. If the hacker was able to install a malicious plugin, it means that he/she is able to log in to the administration screen, so it may be necessary to take other security measures. If the hacker was able to install other malicious files, it means that the hacker has been able to log in to the administration screen, so we will need to take other security measures. Check for unauthorized user registration. Countermeasures against vulnerabilities that allowed hackers to enter the server. Reference 5 free WordPress security measures]]></description>
		
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">10670</post-id>	</item>
		<item>
		<title>Why &#8220;unused plugins&#8221; are an attack vector in WordPress &#8211; the difference between deleting vs. disabling.</title>
		<link>https://blog.website-malware-removal.com/10650</link>
		
		<dc:creator><![CDATA[wpdoctoradmin]]></dc:creator>
		<pubDate>Mon, 01 Dec 2025 01:57:09 +0000</pubDate>
				<category><![CDATA[WordPress Security]]></category>
		<category><![CDATA[backdoor]]></category>
		<category><![CDATA[check]]></category>
		<category><![CDATA[malware]]></category>
		<category><![CDATA[plugin]]></category>
		<category><![CDATA[removal]]></category>
		<category><![CDATA[scan]]></category>
		<guid isPermaLink="false">https://blog.website-malware-removal.com/?p=10650</guid>

					<description><![CDATA[We will explain why &#8220;&#8216;unused plugins&#8217; are an attack vector in WordPress &#8211; the difference between removal vs. disabling. Pathway for WordPress program vulnerabilities to be attacked The main routes of attack for WordPress program vulnerabilities are as follows 1 Vulnerability in admin-ajax is used to attack WordPress has a built-in back-ground communication mechanism called admin-ajax. Many plug-ins use this mechanism, and some plug-ins may use this function in a way that allows vulnerabilities to manifest. Hackers can send queries to admin-ajax that exploit this vulnerability to perform various hacking activities. This type of attack is not effective if the vulnerable plugin is deactivated. 2 Vulnerability of inadequate use of WordPress functions is exploited. In addition to admin-ajax, WordPress has various built-in functions. If a vulnerability is exploited in a way that does not directly access the plugin&#8217;s files, it will not be effective if the plugin is deactivated. This type of vulnerability can be exploited by using the REST API, a communication interface external to WordPress, or by using shortcodes defined in the plugin (shortcodes can be deactivated). (Shortcodes cannot be executed by plugins that have been deactivated.) 3 Program vulnerabilities are directly accessed and used in attacks Some vulnerabilities can be used by hackers for attacks by directly accessing program vulnerabilities. This type of vulnerability can be used for attacks even if the plug-in is deactivated. For example, the following vulnerabilities can be used for attacks even when plug-ins are deactivated. https://wp-doctor.jp/blog/vulnerabilities/litespeed-cache-exploit-cve-2023-40000/ The reason why the following code is inserted in many plugin files is to prevent vulnerability attacks by direct file access. if ( ! defined( &#8216;ABSPATH&#8217; ) ) { exit; } } This code checks for an undefined &#8216;ABSPATH&#8217; if the plugin is deactivated, and forces the process to exit if there is none. However, vulnerable plug-ins may not have this direct access prevention code inserted 4 Backdoors and other malicious programs installed by another hacker are reused in the attack Although this type of attack is very common, it is often not related to the presence or absence of plug-ins or deactivation of plug-ins, since the hacker has already been allowed to enter and install backdoors, etc., if the attack is successful. We recommend that you remove any plug-ins that you have deactivated. Some site operators believe that deactivated plug-ins will not be used for hacking. This may result in deactivated plug-ins that are very out of date, increasing the risk of vulnerability. Since there are so many vulnerabilities that can be exploited by directly accessing files even when deactivated that they cannot be ignored, we recommend that deactivated plug-ins be removed from the server. In most cases, deactivated plug-ins are not used in their entirety, so there is no problem with removing them. However, if you are concerned, we recommend that you perform a full site backup before deleting the plug-in. Click here for WordPress vulnerability testing, malware scanning removal, and plug-ins.]]></description>
		
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">10650</post-id>	</item>
		<item>
		<title>WordPress malware damage: malware that executes malicious code written to the clipboard with a fake captcha</title>
		<link>https://blog.website-malware-removal.com/10606</link>
		
		<dc:creator><![CDATA[wpdoctoradmin]]></dc:creator>
		<pubDate>Tue, 30 Sep 2025 01:27:28 +0000</pubDate>
				<category><![CDATA[WordPress Security]]></category>
		<category><![CDATA[backdoor]]></category>
		<category><![CDATA[free]]></category>
		<category><![CDATA[index.php]]></category>
		<category><![CDATA[malware]]></category>
		<category><![CDATA[plugin]]></category>
		<category><![CDATA[removal]]></category>
		<category><![CDATA[scan]]></category>
		<category><![CDATA[security]]></category>
		<category><![CDATA[virus]]></category>
		<guid isPermaLink="false">https://blog.website-malware-removal.com/?p=10606</guid>

					<description><![CDATA[Recently, we have received several requests to remove malware that executes malicious code written to the clipboard with a fake capture, and there is a possibility that this type of malware is spreading. Here is what we know about this malware. Malware that steals clipboard contents when a fake Cloudflare captcha appears when visiting a site. This malware displays a screen like the one shown above only once to the user who visits the site. (Cookies are used to display it only once.) This fake capture asks the user to do the following in order to browse the site 1 Press &#038; hold the Windows Key R → Display a screen to execute a command locally 2 In the verification window, press Ctrl V 3 Press Enter on the keyboard to complete → The invalid code has already been written to the clipboard and the command will be executed. Let&#8217;s take a look at the malicious commands that the malware writes to the clipboard. (Some of the code has been blurred out because it is dangerous. Let&#8217;s analyze what this command does. 1 -w h = start local execution window hidden 2 ep bypass = Allow script execution ignoring execution policy → This alone shows that the intent is to be &#8220;unobtrusive&#8221; and &#8220;bypass constraints&#8221;. 3 The download source URL is made by string concatenation, and finally https://files.catbox[.] moe/****.txt, and the file is retrieved from the URL and saved in a temporary folder 4 The downloaded file name .ps1 is executed as is (&#038; is the invocation operator). In other words, the local PC is infected with a virus at this moment. How to deal with fake capture malware In many cases, this malware has tampered with the index.php and wp-config.php of WordPress to display a malicious capture screen. If this part of the site has been disinfected and also tampered with, it is highly likely that hackers have already infiltrated the server and embedded backdoors and other malicious code into multiple sites. Free WordPress:Malware Scan &#038; Security Plugin [Malware and Virus Detection and Removal]. We recommend that you perform a malware scan and removal by using the following methods. It is also necessary to close the vulnerabilities that allowed hackers to enter the system in the first place. Please refer to the following pages 5 free WordPress security measures]]></description>
		
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">10606</post-id>	</item>
		<item>
		<title>Japanese SEO Spam, a malware that fills Google search results for WordPress sites with Japanese product pages that you don&#8217;t remember creating.</title>
		<link>https://blog.website-malware-removal.com/10574</link>
		
		<dc:creator><![CDATA[wpdoctoradmin]]></dc:creator>
		<pubDate>Thu, 11 Sep 2025 01:39:22 +0000</pubDate>
				<category><![CDATA[WordPress Security]]></category>
		<category><![CDATA[backdoor]]></category>
		<category><![CDATA[check]]></category>
		<category><![CDATA[free]]></category>
		<category><![CDATA[hacked]]></category>
		<category><![CDATA[htaccess]]></category>
		<category><![CDATA[index.php]]></category>
		<category><![CDATA[malware]]></category>
		<category><![CDATA[plugin]]></category>
		<category><![CDATA[removal]]></category>
		<category><![CDATA[scan]]></category>
		<category><![CDATA[security]]></category>
		<category><![CDATA[virus]]></category>
		<guid isPermaLink="false">https://blog.website-malware-removal.com/?p=10574</guid>

					<description><![CDATA[We will explain about Japanese SEO Spam, a malware that fills the Google search results of WordPress sites with pages of Japanese products that you do not remember creating. How does malware contaminate Google search results? There are three types of malware that contaminate Google search results with branded product pages that have not been created. (1) The link in the contaminated search results is not from your site&#8217;s domain → (2) The link in the search results is not from your company&#8217;s site, but from another site that has been hacked and altered to create a malicious page. Therefore, it is necessary for the operator of the other domain site that has been tampered with to deal with the problem. (2) The search result links to your site&#8217;s domain in the tainted search result, but the link destination does not exist. → In this case, this is SEO spam that takes advantage of the property of WordPress to create search result pages that do not exist. Not because your site has been tampered with, but because the hacker has taken the liberty of registering a nonexistent search results page with the search engine. It is effective to introduce a mechanism (e.g., outputting a noindex header) to prevent non-existent search result pages from being registered with search engines. (2) The domain of your site is the link destination in the tainted search results, and the linked page leads to an illegal product site. *When you access the illegal page, you will first fly to the site&#8217;s domain and instantly see [string].bookslit[.] sa[.]. com, etc., and you may jump to an unauthorized site. → In this case, it is highly likely that hackers have exploited a vulnerability and entered your site&#8217;s server, and the site&#8217;s data and files have been tampered with. We recommend that you first run a malware and vulnerability check on your plug-ins. Free WordPress:Malware Scan &#038; Security Plugin [Malware and Virus Detection and Removal]. If you are unable to log in to the WordPress administration screen, it is possible that hackers have also tampered with the HTACCESS file, which controls server settings. How are contaminated search results registered in the search results? The way a hacker has tampered with your site and registered a malicious page may be by creating that malicious page on your company&#8217;s server, or by tampering with your sitemap and registering the page in Google search results. A sitemap is data that tells search engines which pages are on a site that can be accessed by the following URLs. https://Your site URL/sitemap.xml As an example, a site that has been hacked shows that the sitemap has been falsified and illegal pages have been registered as shown below. In some malware, this page does not actually exist on the server, and when this URL is accessed, a malicious program forcibly redirects the user to another arbitrary site. How to deal with malware Japanese SEO Spam If there are symptoms of such malware, there may be a backdoor somewhere on the server that generates a sitemap, controls [&#8230;]]]></description>
		
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">10574</post-id>	</item>
		<item>
		<title>Infection case of script malware appended to a large number of posts in WordPress</title>
		<link>https://blog.website-malware-removal.com/10550</link>
		
		<dc:creator><![CDATA[wpdoctoradmin]]></dc:creator>
		<pubDate>Fri, 22 Aug 2025 02:00:31 +0000</pubDate>
				<category><![CDATA[WordPress Security]]></category>
		<category><![CDATA[backdoor]]></category>
		<category><![CDATA[database]]></category>
		<category><![CDATA[javascript]]></category>
		<category><![CDATA[malware]]></category>
		<category><![CDATA[removal]]></category>
		<guid isPermaLink="false">https://blog.website-malware-removal.com/?p=10550</guid>

					<description><![CDATA[This page describes an infection case in which script malware was appended to a large number of posts in WordPress. Analysis of script malware that writes itself at the bottom of a large amount of post data The malware shown above is an example of malicious code (mainly a redirection hack that redirects the page to another site without permission) embedded in a post with a script tag. The trouble with this malware is that in some cases, this malicious JS code is written to thousands of WordPress posts. The malware is characterized by multiple strings of _0x3023 ( _0x562006 , _0x1334d6, etc.) and obfuscation of the JS code to make it impossible to tell what it is doing. Some parts of this code use a special way of specifying strings such as \x68\x74\x74\x74\x70\x3a\x2f\x2f\x75\x72\x6c\x63\x75\x74\x74\x74\x6c\x79\x2e\x6e\x65\ as unicode, and such The code can be converted to a readable string by outputting it at a site such as the following. https://playcode.io/javascript Decoding shows that this JS is sending the user to a redirect site URL that shortens any URL. How to deal with SCRIPT malware that writes itself at the bottom of large amounts of submitted data The malware itself writes the above malformed JS to thousands of posts in bulk. In addition, the fact that such modification of posts is possible means that hackers have access to the database, so it is likely that they have already taken over the privileges to rewrite and install files on the server through the installation of backdoors or other means. The measures to deal with this are roughly as follows. (1) Detect and remove malicious JS embedded in posts (2) Detect and remove the malware itself that writes malicious JS (*There is a possibility that the malware has already been deleted. (3) Detection and removal of backdoors that hackers use to infiltrate the server (*The backdoors may not exist as files, but may have been written to memory) (4) Inspection and elimination of vulnerabilities that allowed hackers to enter the server in the first place. (*1-4 can be done to some extent automatically by the malware inspection and disinfection plug-ins. Please use it if you like. To remove infected JS from thousands of posts, you can use Search Regex or other plug-ins that can replace strings in posts with regular expressions in batches. Reference https://blog.website-malware-removal.com/7572]]></description>
		
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">10550</post-id>	</item>
		<item>
		<title>Arbitrary file uploads and SQL injection are the most important vulnerabilities to be aware of in WordPress.</title>
		<link>https://blog.website-malware-removal.com/10533</link>
		
		<dc:creator><![CDATA[wpdoctoradmin]]></dc:creator>
		<pubDate>Fri, 13 Jun 2025 01:56:15 +0000</pubDate>
				<category><![CDATA[WordPress Security]]></category>
		<category><![CDATA[backdoor]]></category>
		<category><![CDATA[check]]></category>
		<category><![CDATA[database]]></category>
		<category><![CDATA[injection]]></category>
		<category><![CDATA[plugin]]></category>
		<guid isPermaLink="false">https://blog.website-malware-removal.com/?p=10533</guid>

					<description><![CDATA[The most important WordPress vulnerabilities to be aware of are Arbitrary file uploads and SQL injection. What vulnerabilities in WordPress are being targeted? When hacking WordPress, hackers use a haphazard method of hitting the easiest and most likely vulnerabilities it has on the site. Because WordPress is the world&#8217;s most popular CMS, with over 100 million sites, there are tools available to hack into multiple WordPress sites one after another to try to find the most prominent vulnerabilities. The two most easily exploitable vulnerabilities that hackers can exploit are arbitrary file uploads and SQL injections. What are Arbitrary file uploads and SQL injection? Arbitrary file uploads are vulnerabilities (link to vulnerability database) that allow arbitrary file uploads. Hackers often use this vulnerability as a starting point to install backdoors that allow them to alter files on the server, change WordPress settings to make it impossible to log in to the administration panel, or embed malicious code in the site content. SQL injection is a vulnerability (link to vulnerability database) that may allow the database to be rewritten. This one is less targeted than Arbitrary file uploads, but if an easily exploitable vulnerability is discovered, hackers may launch an intensive attack. There is an epidemic of hacker attacks. When Arbitrary file uploads or SQL injections are discovered in plug-ins with high penetration, an epidemic occurs in which the vulnerability is widely used. As mentioned above, hackers use tools to attack these vulnerabilities by obtaining a huge number of WordPress listings from search engines, etc. It does not matter how small your site is, as long as it is listed on a search engine, sooner or later it will be exposed to hackers&#8217; vulnerability attacks. It does not matter how small your site is, as long as it is listed on a search engine, it will sooner or later be exposed to hacker vulnerability attacks. In our experience, if a vulnerability is left unchecked, it is likely to be caught in a hacker&#8217;s net within six months to a year. It is important to stay on top of vulnerabilities! If you run WordPress, we recommend that all sites on your server be tested for vulnerabilities every few months. Click here to view our vulnerability database. Click here for a plugin that can test for vulnerabilities.]]></description>
		
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">10533</post-id>	</item>
		<item>
		<title>Example of malformed JAVASCRIPT embedded in all WordPress posts</title>
		<link>https://blog.website-malware-removal.com/10511</link>
		
		<dc:creator><![CDATA[wpdoctoradmin]]></dc:creator>
		<pubDate>Mon, 26 May 2025 01:31:29 +0000</pubDate>
				<category><![CDATA[WordPress Security]]></category>
		<category><![CDATA[backdoor]]></category>
		<category><![CDATA[check]]></category>
		<category><![CDATA[database]]></category>
		<category><![CDATA[free]]></category>
		<category><![CDATA[javascript]]></category>
		<category><![CDATA[malware]]></category>
		<category><![CDATA[plugin]]></category>
		<category><![CDATA[removal]]></category>
		<category><![CDATA[scan]]></category>
		<category><![CDATA[scanner]]></category>
		<category><![CDATA[security]]></category>
		<category><![CDATA[virus]]></category>
		<guid isPermaLink="false">https://blog.website-malware-removal.com/?p=10511</guid>

					<description><![CDATA[There have been an increasing number of cases of malicious JAVASCRIPT being embedded in all WordPress posts. Here is how to deal with this malware. A case in which a malicious JAVASCRIPT is embedded in a WordPress post, causing malicious behavior such as jumping to other sites when the site is accessed. JAVASCRIPT is a scripting language that runs on the browser and performs various functions on the site, such as dynamically rewriting pages, communicating behind the scenes, and animating the layout. Because JAVASCRIPT runs on the browser, even if an illegal JAVASCRIPT is embedded in a site, it cannot directly rewrite files on the server or install any files directly on the user&#8217;s computer, but it can lead the user to dangerous websites or create SEO links to other sites. However, it can lead the user to dangerous websites, or to the insertion of SEO links to other sites without permission. *Servers can also cause serious damage such as users installing malicious software on other sites, or being blacklisted by search engines as having malicious content, which can result in the site not appearing in search results. Example of malicious JAVASCRIPT being embedded in all posts on a site If a hacker takes advantage of a vulnerability in a WordPress site, such as a weak plugin or user password, to gain administrative privileges on the site, in many cases the database can be rewritten as well. Hackers use programs that rewrite the data of the site&#8217;s database submissions in one fell swoop, sometimes writing malformed JAVASCRIPT to thousands of submissions. The malformed JAVASCRIPT is often written at the bottom of the submission data, obfuscated as shown in the figure above. Reference What is the obfuscation process used in over 90% of WordPress malware? What to do when malformed JAVASCRIPT is embedded in a post When malicious JavaScript is embedded in a post, it is often discovered when PC virus detection software blocks access to the site, search results indicate that malware has been detected, or site users complain that they were redirected to another site or forced to download malicious software. In many cases, this is discovered when users of the site complain that they were sent to a different site or forced to download malicious software. Detection of malicious JS Such malicious JS embedding in posts can sometimes be detected by online services such as the following. Try checking for viruses in posts and top page URLs on such sites. Sucuri Site Check Online Malware Scanner For more powerful detection of malware from the inside, you can also use our Malware Detection Plug-in. Free WordPress:Malware Scanning &#038; Security Plugin [Malware and Virus Detection and Removal]. What if thousands of posts have malicious JAVASCRIPT embedded in them? If several thousand posts have malicious JAVASCRIPT embedded in them, it is difficult to remove them one by one by hand. In this case, we recommend the following methods. Roll back to the database before the contamination. Directly execute SQL statements (database processing instructions) that comprehensively disable illegal JAVASCRIPT strings in the database. *This [&#8230;]]]></description>
		
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">10511</post-id>	</item>
		<item>
		<title>What if the server management company has changed the permissions to 000 due to a malware infection and the WordPress site can no longer be displayed?</title>
		<link>https://blog.website-malware-removal.com/10500</link>
		
		<dc:creator><![CDATA[wpdoctoradmin]]></dc:creator>
		<pubDate>Mon, 12 May 2025 02:07:08 +0000</pubDate>
				<category><![CDATA[WordPress Security]]></category>
		<category><![CDATA[backdoor]]></category>
		<category><![CDATA[check]]></category>
		<category><![CDATA[index.php]]></category>
		<category><![CDATA[malware]]></category>
		<category><![CDATA[removal]]></category>
		<category><![CDATA[security]]></category>
		<guid isPermaLink="false">https://blog.website-malware-removal.com/?p=10500</guid>

					<description><![CDATA[This section explains how to deal with a situation where a server management company has changed the permissions to 000 due to a malware infection and the WordPress site can no longer be displayed. If your WordPress site can no longer be displayed and the server management company informs you that the malware has changed the permissions to 000. Each server management company monitors their servers for malware malicious activity. If there is a blatant malware infection and it is confirmed that a large number of unauthorized emails are being sent or the server is overloaded, the server management company may set the permissions to 000 for the malware-infected files. Example of server management company notification In the above server account of the customer, Using mail sending software for servers (Sendmail) We have confirmed that a large number of emails are being sent to email addresses outside of Japan. In response to this, our support team has conducted a security investigation, We have confirmed that a security-critical bug (vulnerability) exists in the program used by the customer, and that it has been exploited by a third party, The possibility of a third party exploiting this vulnerability is very high. Therefore, we are sorry to inform you of the situation after the fact, As an emergency measure, the following restrictions have been implemented. Restrictions implemented by support &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212; Regarding the malware file that was installed, 　Change the permission to &#8220;000&#8221; and disable the function. [List of malware files] *Since there are many files, we will present them in the attached file [ ****.txt ]. &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212; If you are a victim of unauthorized access such as the one described here, In addition to the malicious files detected, other malicious files and backdoors (mechanisms that facilitate unauthorized access) may also be present. backdoor (a mechanism that facilitates unauthorized access) may have been installed. backdoors (a mechanism that facilitates unauthorized access) may have been installed. In order to prevent damage from unauthorized access, please check the following information and take the necessary action, Please check the following information and take the necessary measures to prevent damage from unauthorized access. Reasons why WordPress sites fail to display with permission 000 Permissions are the settings that allow files to be written to and read from. Permission 000 is a setting that prevents files from being accessed or executed, so if important WordPress files (e.g. index.php and wp-config.php) are set to permission 000, the site will not be viewable and you will not be able to log in to the admin panel. WordPress malware infections can be inspected and removed with plug-ins, but this is not possible if you are unable to log in to the admin panel. What to do if you have been set to permission 000 In this case, it may be possible to restore the display of the site by changing the file permissions back to readable (755, 555, etc.) using FTP software, but we strongly recommend that you do not change the permissions back before removing the malware, as this will also restore the [&#8230;]]]></description>
		
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">10500</post-id>	</item>
		<item>
		<title>What is the web shell that infects (hackers install) WordPress?</title>
		<link>https://blog.website-malware-removal.com/10494</link>
		
		<dc:creator><![CDATA[wpdoctoradmin]]></dc:creator>
		<pubDate>Fri, 25 Apr 2025 05:51:44 +0000</pubDate>
				<category><![CDATA[WordPress Security]]></category>
		<category><![CDATA[backdoor]]></category>
		<category><![CDATA[check]]></category>
		<category><![CDATA[database]]></category>
		<category><![CDATA[free]]></category>
		<category><![CDATA[malware]]></category>
		<category><![CDATA[plugin]]></category>
		<category><![CDATA[removal]]></category>
		<category><![CDATA[scan]]></category>
		<category><![CDATA[security]]></category>
		<category><![CDATA[virus]]></category>
		<guid isPermaLink="false">https://blog.website-malware-removal.com/?p=10494</guid>

					<description><![CDATA[This section describes a web shell that can infect (or be installed by hackers) WordPress. What is a Web Shell? A web shell is a generic term for a type of backdoor that can be accessed and used via the Web (online). Think of a backdoor as a hacker&#8217;s way in on a server. In WordPress, web shells are often installed as PHP program files by hackers who take advantage of vulnerabilities to alter files on the server. Examples of web shells installed by WordPress tampering The above malware is a very simple web shell with file upload functionality. Web shells with complex functions may have the ability to execute OS commands, or have the ability to tamper with databases. Web shells that are obfuscated and placed in deep hierarchies are difficult to find. Web shells are often located in the top directory of a WordPress site, but since many of them can run in a single file, they are often located deep within the WordPress hierarchy, and their code may be obfuscated, making them difficult to find even when searching for strings such as &#8220;Shell. Shell&#8221; and so on. The easiest way to check for web shell installations is to use a plugin that comprehensively scans WordPress files for tens of thousands of malware detection patterns. If you like, you can use a free plugin to inspect and remove malware. Free WordPress:Malware Scan &#038; Security Plug-in [Malware and Virus Detection and Removal].]]></description>
		
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">10494</post-id>	</item>
		<item>
		<title>Malware that embeds malicious code in cookies in WordPress</title>
		<link>https://blog.website-malware-removal.com/10471</link>
		
		<dc:creator><![CDATA[wpdoctoradmin]]></dc:creator>
		<pubDate>Mon, 14 Apr 2025 01:35:20 +0000</pubDate>
				<category><![CDATA[WordPress Security]]></category>
		<category><![CDATA[backdoor]]></category>
		<category><![CDATA[check]]></category>
		<category><![CDATA[free]]></category>
		<category><![CDATA[malware]]></category>
		<category><![CDATA[plugin]]></category>
		<category><![CDATA[removal]]></category>
		<category><![CDATA[scan]]></category>
		<category><![CDATA[security]]></category>
		<category><![CDATA[virus]]></category>
		<guid isPermaLink="false">https://blog.website-malware-removal.com/?p=10471</guid>

					<description><![CDATA[This section describes malware that embeds malicious code in cookies in WordPress. Hackers are sending malicious code to servers in more ways than just $_POST and $_GET The most common way to send information to a server is with the $_POST or $_GET function. The sample code to receive data on the server side with $_POST is shown below. $data = $_POST['data']; However, some recent malware has appeared that uses the $_COOKIE function to send malicious code to the server. The $_COOKIE function is a special function called a super global function that can hold values across pages, and is originally intended to hold temporary user cart data on the browser side for e-commerce sites, etc. However, it is also possible to write arbitrary data to $_COOKIE, read it on the server side, and execute it. It is also possible to write arbitrary data to $_COOKIE and have the server read and execute it. Malware that uses COOKIE as an illegal data transmission method has the structure shown in the figure below. First, $_COOKIE[36 -35] is checked to see if the malware code exists in the transmitted data. The reason why $_COOKIE[36 -35] and so on are used is to avoid detection of malware. If malware code is found in $_COOKIE[36 -35], the code is written out by fputs(), resides in the server&#8217;s memory, and finally unlinks&#8217; the physical file to delete the malware. Why would a hacker send malicious code via $_COOKIE? How to stop server-side execution via $_COOKIE? The reason why hackers send malicious code via $_COOKIE may be to ensure that the malicious code is executed on the server side, bypassing the $_POST and $_GET outgoing data inspection. To stop the execution of such malicious code via COOKIE, it is necessary to detect and remove the backdoor program that receives it and performs malicious activities on the server side. These malicious backdoors can be detected and removed with the [Free] WordPress:Malware Scan &#038; Security Plug-in [Malware and Virus Detection and Removal]. However, the plugin may have limitations in detecting new malware that has not yet been patterned for detection. We hope you find this information helpful.]]></description>
		
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">10471</post-id>	</item>
		<item>
		<title>PHP file malware with the same name as the folder name that infects systems other than WordPress</title>
		<link>https://blog.website-malware-removal.com/10466</link>
		
		<dc:creator><![CDATA[wpdoctoradmin]]></dc:creator>
		<pubDate>Wed, 09 Apr 2025 01:15:37 +0000</pubDate>
				<category><![CDATA[WordPress Security]]></category>
		<category><![CDATA[backdoor]]></category>
		<category><![CDATA[check]]></category>
		<category><![CDATA[free]]></category>
		<category><![CDATA[malware]]></category>
		<category><![CDATA[plugin]]></category>
		<category><![CDATA[removal]]></category>
		<category><![CDATA[scan]]></category>
		<category><![CDATA[security]]></category>
		<category><![CDATA[virus]]></category>
		<guid isPermaLink="false">https://blog.website-malware-removal.com/?p=10466</guid>

					<description><![CDATA[We will discuss this case because malware was discovered on a site with a mix of WordPress and other systems, with PHP files having the same names as the folders that are also installed in the non-WordPress systems. Malware infection spreading to systems outside of WordPress The client&#8217;s site was a mix of several WordPress sites and proprietary systems on the server. In general, WordPress malware scans the WordPress folder structure and automatically spreads infection. Therefore, it is rare for the infection to spread to a proprietary system that differs from the WordPress folder structure. However, the client&#8217;s original system was infected with a number of PHP files with the same name as the folder name. For example /var/www/Library/Library.php The code of this PHP file is shown in the figure below. This file is titled Shell Bypass 403 GE-C666C, which is an unobfuscated backdoor. Why did the malware spread to systems outside of WordPress? In general, proprietary systems are rarely the target of hacking unless it is a site with very large traffic and there is a significant benefit to hacking that site. Hacking such proprietary systems requires hackers to manually look for security holes, which is highly technical and time-consuming. On the other hand, there are hundreds of millions of WordPress sites around the world, and due to their high prevalence, there are a huge number of sites with known vulnerabilities that can be tampered with quickly by hacking with an automated hacking tool at random. For this reason, we believe that our client&#8217;s site was first tampered with by breaching the WordPress vulnerability, and then the hacker analyzed the structure of the site through backdoors, etc., and installed the aforementioned backdoor in the site&#8217;s original system in a discreet folder and file with the same name. How to deal with, detect and remove malware on proprietary systems outside of WordPress If WordPress malware infection and tampering is left unchecked, there is a possibility that malware will be installed in the proprietary system as well. For this reason Early detection and removal of malware is also important to protect your own system. We recommend that you use the [Free] WordPress: Malware Scan &#038; Security Plug-in [Malware and Virus Detection and Removal], which automatically and comprehensively scans and notifies you of malware in all files under the WordPress folder, and can also remove malware from the administration screen, to perform malware scanning. We recommend that you use the free WordPress: Malware Scan &#038; Security Plug-in [Malware/Virus Detection and Removal] to scan your website for malware. In addition to malware removal, you should also close the vulnerabilities that allowed hackers to enter your computer in the first place. The most common vulnerabilities used by hackers are as follows Weak passwords for WordPress administrator users Known vulnerabilities in old plugins (most vulnerabilities can be exploited even if the plugin is deactivated) Vulnerabilities in old WordPress sites left on the server Reference 5 free WordPress security measures]]></description>
		
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">10466</post-id>	</item>
		<item>
		<title>Malware infection of wordpress mu-plugins folder</title>
		<link>https://blog.website-malware-removal.com/10460</link>
		
		<dc:creator><![CDATA[wpdoctoradmin]]></dc:creator>
		<pubDate>Fri, 04 Apr 2025 02:08:10 +0000</pubDate>
				<category><![CDATA[WordPress Security]]></category>
		<category><![CDATA[backdoor]]></category>
		<category><![CDATA[check]]></category>
		<category><![CDATA[free]]></category>
		<category><![CDATA[malware]]></category>
		<category><![CDATA[plugin]]></category>
		<category><![CDATA[removal]]></category>
		<category><![CDATA[scan]]></category>
		<category><![CDATA[security]]></category>
		<category><![CDATA[virus]]></category>
		<guid isPermaLink="false">https://blog.website-malware-removal.com/?p=10460</guid>

					<description><![CDATA[There have been an increasing number of cases of malware infection of the wordpress mu-plugins folder. This case study will be explained. Malware infection of mu-plugins folder The wp-content/mu-plugins folder is a folder that does not exist on a typical WordPress site, but allows the installation of forcibly activated plugins that must be run. Therefore, if a hacker installs a malicious program in it, that program will be executed every time WordPress displays a page. We are seeing more and more cases of malicious files being installed in this mu-plugins folder. Example Malicious code like the image below will be installed The code is obfuscated, and when un-obfuscated, it reveals itself to be PHP File Manager Freya, a file manager software used as a backdoor to edit or delete files on a single-file server. How to deal with malware infection of mu-plugins folder In many cases, it is not possible to identify the presence of a malicious program introduced in the mu-plugins folder from the WordPress administration screen. After connecting to the server with FTP software, manually check if the wp-content/mu-plugins folder is not present, and if it is, visually check the code of the files in that folder. If the file is obfuscated and is not a bread-like molded program, then there is a good chance that malware has been installed. Also, please note that plug-ins that can comprehensively inspect and remove WordPress files can also detect and remove this type of malware, although not 100% of the time. Free WordPress:Malware Scan &#038; Security Plug-in [Malware and Virus Detection and Removal].]]></description>
		
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">10460</post-id>	</item>
		<item>
		<title>Online WordPress malware scanning site.</title>
		<link>https://blog.website-malware-removal.com/10440</link>
		
		<dc:creator><![CDATA[wpdoctoradmin]]></dc:creator>
		<pubDate>Wed, 19 Mar 2025 01:25:05 +0000</pubDate>
				<category><![CDATA[WordPress Security]]></category>
		<category><![CDATA[backdoor]]></category>
		<category><![CDATA[check]]></category>
		<category><![CDATA[free]]></category>
		<category><![CDATA[javascript]]></category>
		<category><![CDATA[malware]]></category>
		<category><![CDATA[removal]]></category>
		<category><![CDATA[scan]]></category>
		<category><![CDATA[scanner]]></category>
		<category><![CDATA[security]]></category>
		<category><![CDATA[virus]]></category>
		<guid isPermaLink="false">https://blog.website-malware-removal.com/?p=10440</guid>

					<description><![CDATA[Here are some sites online where you can scan your WordPress output for malware (not a vulnerability scan) to see if there is any malicious code mixed in with the HTML of your site. Sucuri SiteCheck https://sitecheck.sucuri.net/ Sucuri SiteCheck is a fairly old site that allows online malware scanning. You can scan any page by entering its URL. The site pretends to be accessed from Google and scans for malware, so it can detect malware that only appears in Google search results. Quttera https://quttera.com/website-malware-scanner Like Sucuri SiteCheck, Quttera allows you to scan for malware by entering the URL of any page. However, free malware scans are queued and performed in order, so it may take some time for the scan to complete. WP Doctor Online Malware Scanner https://malware-scan.website-malware-removal.com/ WP Doctor Online Malware Scanner is an online malware scanning site with malware detection patterns we have collected from over 1 million malware files. You can scan for malware by file code, file upload, or URL. Limitations of Online Malware Scanning Online malware scans can only scan HTML and JAVASCRIPT code that is output as a site page. However, more than 99% of the malware that infects WordPress resides on the server as PHP programs that run on the server. It is therefore important to note that online malware scans can only scan the results of malicious code generated by such malware. Disadvantages of Online Malware Scanning Since the malware itself is not scanned, even if it is detected, it is often not known where the malware itself is located. Malware detection is limited (spam-sending malware and backdoors, which are malware that hackers use to gain entry into your computer, cannot be detected). ・Malware with various malicious code expression conditions, such as only when accessing a smartphone, or when accessing a site via a search engine, or when a site is accessed by a browser, are often undetectable. Because of the above disadvantages, we believe that the detection accuracy of online malware scanners is strong against redirect hacks, etc., but is quite poor in detecting malware that infects servers as a whole. For more accurate malware scanning, we recommend using a plug-in type malware scanner that can scan the WordPress program itself comprehensively from the inside. Free WordPress:Malware Scanning &#038; Security Plug-in [Malware &#038; Virus Detection and Removal].]]></description>
		
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">10440</post-id>	</item>
		<item>
		<title>WordPress content injection case study, online casino site operating on its own server</title>
		<link>https://blog.website-malware-removal.com/10404</link>
		
		<dc:creator><![CDATA[wpdoctoradmin]]></dc:creator>
		<pubDate>Wed, 26 Feb 2025 01:23:16 +0000</pubDate>
				<category><![CDATA[WordPress Security]]></category>
		<category><![CDATA[backdoor]]></category>
		<category><![CDATA[check]]></category>
		<category><![CDATA[clean]]></category>
		<category><![CDATA[free]]></category>
		<category><![CDATA[injection]]></category>
		<category><![CDATA[malware]]></category>
		<category><![CDATA[plugin]]></category>
		<category><![CDATA[removal]]></category>
		<category><![CDATA[scan]]></category>
		<category><![CDATA[security]]></category>
		<category><![CDATA[virus]]></category>
		<guid isPermaLink="false">https://blog.website-malware-removal.com/?p=10404</guid>

					<description><![CDATA[Here is a case study of a WordPress content injection that caused an online casino site to operate on its own server. What is content injection? Content injection is the embedding of content on the server that is not intended by the operator. In the case of our malware removal service, over 7,000 online casino introduction pages were hosted in the folder &#8220;online-casino&#8221; on the initial domain of the X server. online-casino folder of the initial X server domain, more than 7,000 online casino introduction pages were hosted without permission. Why and how do hackers perform content injection? The embedding of malicious content from the online casino in this case may be to hook it into the search engines and improve the SEO of the site, which is the hacker&#8217;s intention, or to embed this content in another malicious site or in spam emails to hide who is creating and hosting the content. or to embed this content in another rogue site or in a spam email to hide who is creating and hosting the content. In our customer&#8217;s case, content injection was performed on the initial domain of the X server, but there were no other files in the initial domain folder of the X server. This means that there is another malware body (backdoor) embedded in the folders of other sites on the server that can write to the server-wide folder. Malware (backdoors) in all site folders on the server need to be removed and vulnerabilities addressed. Many of today&#8217;s malware reads the folder structure of all sites hosted on the server to spread infection, perform content injection, etc. For this reason, if any site on the server shows symptoms of malware, we recommend that you remove the malware from all WordPress sites hosted on the server and take measures to prevent vulnerabilities. Free WordPress:Malware Scan &#038; Security Plugin [Malware and Virus Detection and Removal]. What happens if I leave my site infected with malware? If left unchecked, malware infection can result in the aforementioned content injection contaminating search results, preventing users from reaching your site, a large amount of malware from low-quality programs being embedded in your site, rendering your site unviewable, or your domain becoming a springboard for spam emails so that your It can also be a stepping stone for spammers, causing your domain&#8217;s email address to be blocked by spam filters, or even worse, users can be misdirected to another site and suffer actual damage. We recommend that all sites on the server be cleaned of malware and secured as soon as possible.]]></description>
		
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">10404</post-id>	</item>
		<item>
		<title>Malware removal for a group of WordPress sites spanning multiple domains on a single server</title>
		<link>https://blog.website-malware-removal.com/10370</link>
		
		<dc:creator><![CDATA[wpdoctoradmin]]></dc:creator>
		<pubDate>Mon, 03 Feb 2025 01:13:38 +0000</pubDate>
				<category><![CDATA[WordPress Security]]></category>
		<category><![CDATA[backdoor]]></category>
		<category><![CDATA[free]]></category>
		<category><![CDATA[hacked]]></category>
		<category><![CDATA[malware]]></category>
		<category><![CDATA[plugin]]></category>
		<category><![CDATA[removal]]></category>
		<category><![CDATA[scan]]></category>
		<category><![CDATA[security]]></category>
		<category><![CDATA[virus]]></category>
		<guid isPermaLink="false">https://blog.website-malware-removal.com/?p=10370</guid>

					<description><![CDATA[We have compiled a list of precautions for malware removal for a group of WordPress sites spanning multiple domains on a single server. Dangers of running a large number of domain sites on the same server Increasingly, malware today scans multiple WordPress sites that share the same parent folder (root folder) and spreads malware. It is also becoming increasingly common for hackers, through backdoors or other means, to search for other websites on the server and embed new malware on those sites. Therefore, if you have dozens of sites on a single server subscription, even sites with no security issues can have malware embedded via an old WordPress site in a different folder. In the worst case, the malware infection can spread to all the sites on the server. Malware removal for multiple sites on the server The aforementioned &#8220;scan multiple WordPress sites that share the same parent folder (root folder) and spread malware&#8221; function may be automated so that the sites are reinfected each time they are accessed. Therefore, if multiple sites on a server are infected with malware and you perform malware removal on each site, the previous site may be reinfected while you are working on the next site. For this reason, when multiple sites on a server are infected, it is advisable to use the following strategy for malware removal. Malware disinfection of all sites on the server, and then replace all the decontaminated sites at once (perform malware disinfection of multiple sites at once to avoid as much time delay as possible). If you want to remove malware from each site one by one, migrate the malware-removed sites to a different server (another contracted folder on the same server is also acceptable) and make the server only for the malware-removed sites. Malware inspection and removal can also be done from the WordPress plugin. Free] WordPress:Malware Scan &#038; Security Plugin [Malware and Virus Detection and Removal]. Security Measures In addition, even after malware removal has been performed, if the vulnerability that allowed the hacker to enter the site in the first place remains on any of the sites on the server, it is possible to be hacked again. We will take security measures for all sites on the server, paying special attention to the following points ・Make the administrator user&#8217;s password a random string of at least 12 characters. Investigate whether any unauthorized users have been registered. We will investigate the vulnerability of plug-ins, etc., and update or discontinue their use if vulnerabilities are found. For other important security measures, please refer to the following 5 free WordPress security measures]]></description>
		
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">10370</post-id>	</item>
		<item>
		<title>Malware wp-blog-header.php, wp-cron.php, .htaccess proliferating outside of the public folder on the server in WordPress</title>
		<link>https://blog.website-malware-removal.com/10349</link>
		
		<dc:creator><![CDATA[wpdoctoradmin]]></dc:creator>
		<pubDate>Mon, 06 Jan 2025 01:41:27 +0000</pubDate>
				<category><![CDATA[WordPress Security]]></category>
		<category><![CDATA[backdoor]]></category>
		<category><![CDATA[check]]></category>
		<category><![CDATA[free]]></category>
		<category><![CDATA[htaccess]]></category>
		<category><![CDATA[malware]]></category>
		<category><![CDATA[removal]]></category>
		<category><![CDATA[scan]]></category>
		<category><![CDATA[security]]></category>
		<category><![CDATA[virus]]></category>
		<guid isPermaLink="false">https://blog.website-malware-removal.com/?p=10349</guid>

					<description><![CDATA[If you find multiple wp-blog-header.php, wp-cron.php, and .htaccess files outside of the public folder on your server in WordPress, be careful. These files are most likely malware that propagates automatically. If you have WordPress files in a location other than the public folder on the server with WordPress If there are many .php or HTACCESS files located in folders other than the public WordPress folder (www, public_html), such as htpasswd, script, xserver_php, mail, or folders above them, the server is infected with malware and malware damage may have spread to the entire server. If you have a large number of .php or HTACCESS files located in folders other than htpasswd, script, xserver_php, mail, or the folders above them, they may be infected with malware and the malware may have spread to the entire server. As an example .htaccess wp-blog-header.php wp-cron.php and moon.php or PHP files with random strings. If you download these files using FTP software, open them with a text editor, and see the following obfuscation, the malware is automatically spreading the infection to all folders. PHP files only work on the server, so even if you open the malware with a text editor, it will not infect your PC. Why is malware generated in every folder at the server location? The reason for this is that somewhere on the server there is a type of malware called a backdoor that automatically writes malware to every folder on the server. PHP file malware cannot take effect without access, so it does not make sense if it is outside the public folders, but because of the low quality of the backdoor, it can write a lot of malware not only to the folder where WordPress is located, but also to private folders. *But if a malicious HTACCESS file is written outside the public folder, it can adversely affect the lower level folders, making it impossible to log in to WordPress or disabling some functions of the administration panel. How to deal with malware written outside the public folder If you are sure that the malware is not in the public folder of the server, you can remove it by deleting the file as is. However, it is possible that a backdoor or other malware may have infected some of the folders where WordPress is located, so it is also necessary to inspect and remove malware from WordPress as a whole. (If you do not delete the main body file of the malware that is infecting WordPress, it will re-infect the WordPress site.) Free WordPress:Malware Scan &#038; Security Plug-in [Malware and Virus Detection and Removal]. We also need to close the vulnerability that allowed hackers to deface the site in the first place. Reference Five WordPress security measures If left unchecked, malware can lead to exclusion from search results, inaccessibility of the site, and users being redirected to other malicious sites where they can be infected with viruses. If you feel that the situation is out of control, please consider consulting a specialist as soon as possible.]]></description>
		
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">10349</post-id>	</item>
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