New worms that use Microsoft's instant-messaging software to spread are tunneling their way across the Web.Antivirus companies on Tuesday flagged a new worm targeting MSN Messenger and a variation of an existing threat.
Researchers at both Aladdin Knowledge Systems and F-Secure discovered the appearance of Win32.Kelvir.a, a new twist on the previously identified Kelvir threat. Each company also identified a new worm in the wild; Aladdin is calling it Win32.Serflog.a., while F-Secure is calling the same threat Sumom. Aladdin is rating both Win32.Kelvir.a and Win32.Serflog.a as medium-to-high risks.
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