Fake antivirus peddlers helped by Microsoft and the IRS?

It’s been just a couple of weeks since the U.S. Federal Trade Commission shut down two companies accused of selling fake antivirus software. Now there’s a new player, taking advantage of the security loopholes in the Microsoft and IRS websites.

Over the past four days the scammers have used so-called redirector links on Web sites belonging to magazines, universities and, most remarkably, the Microsoft.com and IRS.gov domains, said Gary Warner, director of research in computer forensics at the University of Alabama at Birmingham, who first reported the activity on his blog Tuesday.

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