Answers Trickle Out as Spammer Networks Remain Compromised

"Joe Stewart, director of malware research for SecureWorks, said some botnets might remain disconnected. The three largest spam botnets on the Internet appear to be stranded and unable to contact more than a small number of their control servers, according to Marshal, a computer security firm in the United Kingdom that tracks bot activity.

"The shutting down of McColo may have also slowed one of the most aggressive e-mail-address harvesting services, anti-spam groups said. Matthew Prince, chief executive of Unspam Technologies and founder of Project Honey Pot, a collaborative effort that gathers intelligence about the world's largest spam networks, said that since June 2006, crawler bots hosted at McColo were responsible for more than 30 million spam messages sent to the project's e-mail traps."

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