We've received some reports of a new massmailer spreading. This is detected either as a Mytob variant or as "Doombot". It mixes the code of Mydoom, Mytob and some IRCBots. Nice.

This is detected by our update 2005_10_15-01 as Email-Worm.Win32.Doombot.a.

Update: Five hours later, we got another one. Added in 2005_10_16-01 as Email-Worm.Win32.Doombot.b.