Five variations of the Bagle worm were released over the weekend, and two of them use tricks to bypass mail filters and antivirus scanners.
Three new Bagle variants discovered over the weekend differ from previous incarnations by using an antispam trick to try to avoid detection by antivirus software--but experts believe the attempt won't succeed.
Security researchers have discovered that the authors of MyDoom and Bagle are exchanging insults with the author of NetSky, using text hidden inside their virus code.
The latest variant of the mass-mailing Sober worm masquerades as an official Microsoft patch for the MyDoom worm.
Microsoft can expect thousands of extra technical support calls after the release of its security update for Windows XP this northern summer, according to security analysts.
A new variant of the MyDoom worm, described variously as MyDoom.Q or MyDoom.O, was discovered on Tuesday that uses Yahoo's People Search to find new email addresses.
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