The Seattle Times: Business & Technology: MyDoom worm not strong enough to slam Microsoft, virus experts say "Microsoft likely won't have that problem. Jimmy Kuo, a researcher with the anti-virus team at McAfee Security, based in Santa Clara, Calif., said MyDoom.B has its own flaw — a bug within a bug, so to speak — that will make the attack ineffective. About 93 percent of computers that try to attack Microsoft's site will fail, he said.
And MyDoom.B isn't really circulating on the Internet, he said. By yesterday morning, he said, McAfee had collected a sample count of millions of MyDoom.A instances, but the MyDoom.B count was in the teens.
MyDoom.B has another twist: It is programmed to block a computer's access to some 65 Web sites, including many of the top anti-virus vendors. Some of the 65 belong to Microsoft, such as its site for developers and the Windows Update site the company uses to provide security information to customers.
Microsoft has responded by creating another Web site, at https://information.microsoft.com, that isn't on the worm's hit list. Customers can go there to learn how to get rid of the worm and visit some of the company's blocked sites, said Stephen Toulouse, a security program manager at Microsoft."