Two new mass-mailing worms hit corporate networks Wednesday, continuing what has been a miserable spring for IT managers who have had to deal with an unrelenting rash of malware. The two newest entrants are Bagle.AA and Netsky.AB, both of which have been rated as medium risks by antivirus vendors. There is little new in either of the viruses and they both borrow heavily from their forebears. The new variant of Bagle uses an increasingly popular tactic among virus writers: attempting to terminate various security applications, including antivirus software and personal firewalls. The rest of its behavior is fairly typical, as the virus arrives via e-mail with a random subject line and spoofed sending address. Subject lines include “Re: Msg reply,” “Re: Yahoo,” and Re: Document.” The text of the e-mail is random and meaningless, as well. Full Story
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