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Dealing with Metamorphism

Myles Jordan
Virus Bulletin, 1 Oct 2002
ISSN 0956-9979
October 2002

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When the virus writer known as z0mbie released Win95.Zmist.A in early 2001, much of the attention paid to this virus by the AV community was directed at its remarkable ability to intersperse its own code with that of its infection target. However, this virus also embodied the continuation of z0mbie's work on viral evolution towards metamorphism - a form of camouflage being developed by virus writers that is so potent and radically different from common encryption that AV scanners will soon need powerful new tools to confront this threat. This article will discuss one possible method that AV scanners could use to deal with metamorphism.

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