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A Fresh Batch of Aggressive Viruses

Several Internet security sites are warning of some potentially serious new computer virus outbreaks. A new version of the Bagle worm always makes news because it has been so successful in the past. The latest variants -- there are at least three -- surfaced this morning, according to a writeup at the SANS Internet Storm Center. As we've noted before, the Bagle worm is the result of an unholy alliance between spammers and virus writers, designed to conscript your PC as a spam-spewing zombie.

The viruses arrive via e-mail in an attached ".zip" file, bearing a spoofed "from" address, meaning it's likely to appear to come from someone you know. According to SANS, if receive such an e-mail from a person you know today, it may be best to delete the file or wait until you can confirm its authenticity with the supposed sender. That's because at the time of this writing, several popular antivirus programs don't appear to have the latest updates that would allow the software to detect it as a threat if you open or scan the attachment, SANS reports.

A couple of other things to watch out for are two new versions of the MyTob worm, which we've also covered before. Mytob is one of this year's most successful (read: infectious) worms, spawning more than 125 new variants and infecting more than 65,000 computers worldwide, according to Internet security firm Trend Micro.

By Brian Krebs  |  May 31, 2005; 1:52 PM ET
Categories:  Latest Warnings  
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