We will explain how an infection (tampering) with the WordPress database can cause the files on the site (server) to be tampered with.


Types of WordPress Malware Infection

WordPress consists of three major types of data: a group of program files, uploaded data such as images, and a database where content text and various WordPress settings are recorded.

Of these, the program files are the most frequently tampered with, and in our experience, more than 90% of the time, the program files are tampered with or incorrect files are added.

Cases of unauthorized data being written to the database are rare among WordPress hacking victims.

What kind of malware infects WordPress databases?

Database tampering is done through SQL injection attacks, backdoors, and brute force attacks that take advantage of plugin vulnerabilities. Through these attacks, the WordPress database may be tampered with and unauthorized data may be written to it.
There are three main types of database tampering

(1) Content tampering

WordPress content is embedded with Javascript code that creates unauthorized redirects (users who visit the site are automatically redirected to other sites) or advertisements.

(2) Tampering with configuration data

Some configuration data of plug-ins or themes are tampered with, and the configuration data is output to the homepage, causing unauthorized redirects, unauthorized search engine registration, or other unintended actions to the site.

(iii) Addition of unauthorized users

WordPress users have IDs and passwords recorded in the database. This user can be created by a hacker by tampering with the database, allowing the hacker to log in as an administrator at will.

Does database tampering cause tampering with WordPress files?

Since only data can be recorded in the database and not executed as a program on the server (data in the database can only be retrieved), database tampering can directly cause tampering with files on the server, installation of backdoors or other server file tampering or folder structure on the server, such as by tampering with files on the server or installing backdoors.

However, if an unauthorized administrator user is created as described in (3) above, a hacker can log in to WordPress with administrator privileges, which means that he/she can alter any files, install backdoors, or do anything else.

Malware such as WordPress database tampering and file tampering can be scanned and removed with our plug-ins.
Many of the features are free of charge, so please feel free to use them.

Free] WordPress:Malware Scan & Security Plugin [Malware and Virus Detection and Removal].

We also recommend that you regularly check your WordPress site for unauthorized users.

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