It sounds funny, but malicious attackers are very competitive people, according to Computerworld. As Symantec informed, the Storm Trojan (Peacomm), which caused loads of spam during Jannuary, got a new code, which now attacks other spam and malware domains.

"But one researcher traced the Trojan further back than that. According to an analysis by Joe Stewart, a SecureWorks senior security researcher, Peacomm is actually a spinoff of last year's "Nuwar" worm. "It's pretty much the same code," said Stewart.
Both Stewart and Huger also noted that the Trojan has been behind several recent distributed denial-of-service (DDoS) attacks against antispam Web sites, as well as servers supporting rival malware."

The worm spreads through AOL Instant Messenger, Google Talk and Yahoo Messenger, as a message pretending to come from a trusted source.

Could this be a beginning of a new malware on malware war? Hope so, maybe they will forget all about us, normal people.