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Raised hacklez

Peter Ferrie
Virus Bulletin, July 2002, pp.8-11
ISSN 0956-9979
November 2002

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When W32/Klez first appeared, it seemed like just another mass mailer of little note, but its later variants have spread so widely and rapidly that the Klez family has generated more interest. At the time of writing, there are 12 known variants of Klez. Despite the speed with which anti-virus developers released detection updates, despite the fact that some anti-virus products detected the later variants even before they were released, and despite its destructive payload, Klez remains a problem that shows no sign of being resolved in the near future.

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