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Techniques for detecting keyloggers in computer systems

  • US 8,707,437 B1
  • Filed: 04/18/2011
  • Issued: 04/22/2014
  • Est. Priority Date: 04/18/2011
  • Status: Active Grant
First Claim
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1. A computer-implemented method of detecting a keylogger in a computer, the method comprising:

  • the computer generating a test string;

    the computer writing the test string directly to an I/O (input/output) port of the computer for accepting keyboard input to perform a simulated keyboard input using the test string;

    the computer monitoring for files that are modified during writing of the test string directly to the I/O port using a file system driver that monitors for file modifications in kernel mode;

    the computer identifying a file detected by the file system driver as having been modified during the simulated keyboard input; and

    after identifying the file as having been modified during simulated keyboard input, the computer detecting the keylogger by scanning the file for presence of the test string.

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