Ryan Naraine writes in eWeek:
Microsoft Corp. late Wednesday shipped an update to its malware removal tool to detect and delete the fast-spreading "Zotob" worm family.
Microsoft typically updates the free utility once a month�on Patch Tuesday�but with at least a dozen "Zotob" variants squirming through unpatched Windows 2000 systems, the company added detections for 10 mutants to help with the cleanup process.
The new version of the Malicious Software Removal Tool will now zap the following worms: Zotob.A, Zotob.B, Zotob.C, Zotob.D, Zotob.E, Bobax.O, Esbot.A, Rbot.MA, Rbot.MB and Rbot.MC.
Updated Malicious Software Removal Tool: