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You've got M(1**)a(D)i(L+K)l

Peter Ferrie
Virus Bulletin, November 2002, pp.10-11
ISSN 0956-9979
November 2002

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Abstract

Encryption techniques have evolved over the years, from simple bit-flipping, through polymorphism, to metamorphism, and combinations of these have been used as well (for example, see VB, May 2002, p.4). All of these techniques have one thing in common: they are applied to the virus body. The alternative is to apply them to the thing that contains the virus body. This variant of the Chiton family, which the virus author calls W32/Junkmail, is one of those.

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