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Monday, 18 May 2009

martuz.cn injection attack

In the past couple of weeks, thousands of websites were hit with an injection attack pointing to gumblar.cn.. this week it has changed to martuz.cn. It's not a SQL injection attack as far as I can tell, the smart money is that it is using compromised FTP credentials, possibly harvested from end-user PCs rather than a problem with the web server itself.

A typical attack is that JS files on the victim's server are altered with an obfuscated (i.e. partly encrypted) script which might vector through martuz.cn/vid/?id=5718066 or martuz.cn/vid/?id=575730 or something similar, then leading to martuz.cn/vid/?id=3 or another similarly named page (the exact URLs may vary depending on the client software).

There's a writeup about martuz.cn here and here, in the meantime blocking traffic to the domain and the IP address will probably be a good idea.

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