Nowadays web technologies allow users to make a lot of their work online. Cloud services, social networks, online games etc. are gaining more and more popularity and are replaicing desktop applications and offline stuff. Web-browsers also offer special opportunities, that can be increased by the use of different extensions and

In the last several years malware writers have clearly understood that getting access to web servers can bring more benefits than infecting users’ PCs. Nowadays there are millions of completely unprotected web-sites and web servers with different kinds of vulnerabilities, so it is easy for attackers to upload web shells