"It appears whoever wrote Zotob had access to the Mytob source code, ripped out the email-spreading section and plugged in the Microsoft exploit," added Cluley.

Zotob.e, for instance, is also known as Rbot.cbq, while Esbot.a is tagged as various versions of Rbot, Sbot, or even IRCbot. Confusion reigns.) The rate of infection by Zotob and its brethren has ...