Dynamic heuristic method for detecting computer viruses using decryption exploration and evaluation phases
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United States of America Patent
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Mar 12, 2002
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N/A
app pub date -
Sep 23, 1997
filing date -
Sep 23, 1997
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Abstract
A method for detecting computer viruses comprising three phases: a decryption phase, an exploration phase, and an evaluation phase. A purpose of the decryption phase is to emulate a sufficient number of instructions to allow an encrypted virus to decrypt its viral body. A purpose of the exploration phase is to emulate at least once all sections of code within a region deemed likely to contain any virus present in the target program. A purpose of the evaluation phase is to analyze any suspicious behavior observed during the decryption and exploration phases to determine whether the target appears to be infected.
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