VIRUS ALERT !!! CATEGORY: 4 W32.Sasser.B.Worm

W32.Sasser.B.Worm is a variant of W32.Sasser.Worm. It attempts to exploit the LSASS vulnerability described in Microsoft Security Bulletin MS04-011, and spreads by scanning randomly selected IP addresses for vulnerable systems.

http://securityresponse.symantec.com/avcenter/venc/data/w32.sasser.b.worm.html