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Polymorphic Batch

roy g biv
Valhalla #2
December 2011

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Abstract

Everyone knows about batch files. Lots of very poor viruses have been written using it. Some of those viruses are even "encrypted", using environment variable tricks (simple text substitution). A few of them can change parts of their code using specially marked lines, find.exe, and output redirection. There has never been a truly polymorphic one... until now.

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