Method and apparatus for detection of computer viruses
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United States of America Patent
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Mar 14, 1995
Grant Date -
N/A
app pub date -
Jul 29, 1993
filing date -
Jul 29, 1993
priority date (Note) -
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Abstract
A behavior analyzing antivirus program detects viral infection of a target program by emulating the execution of the target program and analyzing the emulated execution to detect viral behavior. The antivirus monitor program contains both variables corresponding to the CPU's registers and emulation procedures corresponding to the CPU's instructions. The target program is loaded into memory and its execution is emulated by the antivirus monitor program. Intelligent procedures contained in the monitor program are given control between every instruction emulated so as to detect aberrant or dangerous behavior in the target program in which case the danger of a viral presence is flagged and emulation is terminated.
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