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WinSxS Executable File Creation By Non-System Process

Sigma Rules

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Summary
The rule "WinSxS Executable File Creation By Non-System Process" detects the creation of executable binaries in the 'WinSxS' directory on Windows systems, specifically focusing on files that are initiated by non-system processes. The WinSxS folder, which serves as the Windows Component Store, is crucial for the operation and functionality of Windows. Unauthorized creation of executables in this directory can signify malicious activity, such as malware trying to hide or install itself in a location where it is less likely to attract attention. The detection logic uses file path conditions and ensures that the executables are not being created by trusted system processes. The rule includes a mechanism to filter out actions initiated by legitimate Windows system files, reducing false positives and increasing detection accuracy.
Categories
  • Windows
  • Endpoint
Data Sources
  • File
Created: 2023-05-11