Here is what to do when the browser screen turns red when accessing your (your company’s) site and a warning appears on that screen.

Suddenly a warning screen appears when accessing the company’s website.

When accessing your company’s website, the browser screen may turn red and a warning may appear, preventing you from accessing the site. The warning may be worded as follows

You are trying to access a fake site.
Accessing this site may cause damage to your computer.
There is a possibility of malicious software.
Suspected phishing site

If you experience any of the above problems, it is likely that your WordPress site has been hacked and defaced. The site has been sent to another unauthorized site with a warning, or the site has been defaced to place viruses or other unauthorized software on the server, indicating that your site has been blacklisted.

What to do if you start getting a red warning screen when accessing your WordPress site

1 Remove site tampering and malware

In this case, the first step is to remove the website tampering. If you can access the original site from the red warning screen details button, log in to WordPress and use the malware inspection plugin.

Please consider using our malware removal plug-in.
[Free] WordPress:Malware Scan & Security Plugin [Malware and Virus Detection and Removal].

2 Site Security Measures.

This is another basic security measure that can be done by a professional or for free.

Update WordPress and plug-ins.
Check and remove unauthorized users and use complex passwords that include one-byte alphanumeric symbols.
Remove malware from other sites on the server.
Install and configure security plug-ins.

Please take the following measures.
Reference
5 Free WordPress Security Measures

3 Request for re-examination from Google Search Console

Finally, request a re-review of your site from Google Search Con sole.
If you have not registered with Search Console, please do so.

After logging in to Search Console, you can request a re-review from “Security and manual measures” -> “Security issues”.

At this time, you will need to report what site malware removal and security measures you have taken.
For example

We have investigated and removed malware from the website and updated WordPress and plugins. We have also removed unused plugins, removed unauthorized users, and changed administrator passwords.

The following is an honest description of the actions taken, including

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