Antivirus software companies warned customers about a new variant of the Sober e-mail worm, which began spreading on the Internet Monday and masquerades as a Microsoft Corp. software update.
Sober.D is the latest version of a worm that first appeared in October. The new worm poses as a software patch that will remove the MyDoom virus from infected Windows systems, said antivirus company F-Secure Corp. of Helsinki.
F-Secure first detected the new worm variant in Germany early Monday. The company rated the virus a "Level 2" threat, indicating "large infections," the company said.
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