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Cb Defense: Why is a signed file from a trusted site flagged as KNOWN_MALWARE?

Cb Defense: Why is a signed file from a trusted site flagged as KNOWN_MALWARE?

Environment

  • Cb Defense Web Console: All Versions
  • Cb Defense Sensor: All Versions

Question

Why is a signed file that is downloaded from a trusted site blocked from running by Cb Defense and listed as KNOWN_MALWARE?

Answer

A signed file from a reputable site may be bundled with a PUP or other suspicious software.

Additional Notes

  • The file name may indicate there is additional software included with the package.  For example, a downloaded installer file may have a name such as "program_setup_bundled.exe".
  • Some sites or vendors may include additional download links to a non-bundled version of the software.

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Creation Date:
‎08-13-2018
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