Kretov Nikolai Nikolaevich: Viruses on websites

At one time, the problem of infecting computers with all sorts of Trojans and viruses was especially urgent, but soon anti-virus programs learned to cope with them perfectly. Now, with the latest version of the relevant software and regular database updates, users have almost no problems with the security of using a PC. Therefore, this malicious industry began to develop in a different direction, finding vulnerabilities on the Internet and filling it with viruses on websites.

Such viruses act according to the following general scheme: they penetrate into the user's computer and steal FTP access data here (many webmasters, by their own hindsight, save this information, which is what viruses use), then go to the site's files and start introducing malicious code. Nowadays, it is almost impossible to protect yourself from viruses on the site. This is due to the fact that, as such, the pages do not contain viruses, there is only a link to a negative site, when used, the whole process starts. Viruses on websites are usually presented in the form of IFRAME and Java-Script scripts.

How to detect viruses on the site:

• Your antivirus may report the presence of unauthorized code if it detects an attempt to download or run other unplanned actions.
• If you notice that the file has been resized and dated to a day when you yourself did nothing of the kind, it means that a virus has probably settled there.
• The appearance of new unfamiliar files.
• The presence of code in an iframe tag at the end of the page, usually under the closing body tag.

What to do if you find viruses on the site:

• Change all logins and disable logins from all IP addresses except your own.
• If you find one infected file, then look at all the others that have the same modification date. It is possible that the virus has already grown into dozens of files.
• Delete all created files, clean infected files from harmful scripts.

As you understand from all of the above, in most cases the owner himself is the culprit for viruses entering the site. Therefore, be careful about protecting your project and changing its internals, and never save your passwords in browsers or FTP clients. As they say, you will be more whole!