AntiVirus is a WordPress plugin by stalkerX made to protect your blog against exploits and spam injections.
Features
WordPress 3.x ready: Design as well as technical
Detect the current WordPress permalink back door
Quick & Dirty: activate, check, done!
Manual testing with immediate result of the infected files
Daily automatic check with email notification
Whitelist: Mark the suspicion as “No virus”
Clean up after uninstall the plugin
English, German, Italian, Persian, Russian
Plugin homepage: http://wpantivirus.com/
Download and info: http://wordpress.org/extend/plugins/antivirus/