...detected as Troj/Agent-FZB) drops 2 kernel driver rootkits both of which are used to stealth the Troj/Agent-FZBTrojan (detected as Troj/NTRootK-BY and Troj/Agent-FVT respectively). Posted on July 27th, 2007 by CheeHui...
http://www.sophos.com/blogs/sophoslabs/post/417