Troj/AntiAV-C is a Trojan for the Windows platform.

Troj/AntiAV-C runs continuously in the background, providing a backdoor server that allows a remote intruder to gain access and control over the computer via IRC channels.

When first run Troj/AntiAV-C copies itself to Windows\wksvcsc.exe.

The following registry entry is created to run wksvcsc.exe on startup:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run Windows UDP Control Services wksvcsc.exe

More information can be found at this Sophos page.