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Suspicious desktop.ini Action

Sigma Rules

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Summary
This detection rule identifies suspicious activity involving the `desktop.ini` file in Windows. The `desktop.ini` is a configuration file used by Windows to customize folder properties, including the display of contents in Windows Explorer. Malicious actors can exploit this file to manipulate folder appearance or behaviors without altering the actual files on disk. This rule is designed to monitor access patterns to `desktop.ini` by unusual processes that may indicate exploitation. It triggers when a process attempts to access `desktop.ini`, provided that it does not match any of the predefined filters that account for legitimate software behavior. The detection rule employs multiple filters to distinguish between expected and suspicious activity, reducing false positives. The rule is part of a broader persistence technique category in attack frameworks, marking it as a substantial indicator of potentially nefarious behavior.
Categories
  • Windows
  • Endpoint
Data Sources
  • File
Created: 2020-03-19