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If Svar is the answer...

Peter Ferrie
Virus Bulletin, February 2012, pp. 4-5
ISSN 0956-9979
February 2012

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Abstract

The Intel MMX instruction set is full of instructions whose usefulness might not be immediately clear to anyone who does not work with graphics. However, it’s not just the graphic designers who can do interesting things with them. Virus writers are finding ways to (ab)use some of the instructions, too. This time, we have W32/Svar, and another way to encode.

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