He’s been a virus writer for seven years. He goes by the handle Melhacker and may have been responsible for the recent outbreak of the Bugbear worm, the second most prevalent worm on the Internet last year. Now he claims to be working on a new virus, Scezda, that represents a new type of threat. Scezda, as he describes it, falls into an emerging category of megaworms that combine features from some of this year’s most prolific worms and viruses, including Sircam, Klez and Nimda. It uses a random number generator to determine how long it will remain dormant on a target system. Then it randomly chooses one of many different methods to replicate itself. This is the essence of the new era of megaworms, what some experts refer to as blended, or polymorphic, threats that rely upon multiple methods of propagation. And that’s just one way in which the virus threat is evolving. Full Story
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