WordPress AntiVirus Protection
Posted on September 7th, 2011
AntiVirus for WordPress is a smart and effective solution to protect your blog against exploits and spam injections. Special feature of this plugin is Manual testing with immediate result of the infected files, and Daily automatic check with email notification.
This really works.. I installed this plugin on a theme running on justhost.com and it found a permalinks hack similar to the one on this link
http://mashable.com/2009/09/05/wordpress-attack/