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Potential Chrome Frame Helper DLL Sideloading

Sigma Rules

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Summary
This detection rule identifies potential side-loading attacks involving the 'chrome_frame_helper.dll' dynamic link library (DLL). The rule specifically monitors for instances where this DLL is loaded from unauthorized paths, which may indicate an attacker attempting to exploit the application by executing a malicious version of the DLL. The detection logic checks whether the image loaded ends with 'chrome_frame_helper.dll' while filtering out legitimate loads from specified Google Chrome application directories. If the DLL is loaded from a path that does not start with the main or optional user paths provided, it triggers an alert. This type of attack is relevant to concerns around defense evasion and privilege escalation, making it crucial for organizations to have visibility into such potentially malicious activity.
Categories
  • Windows
  • Application
Data Sources
  • Image
Created: 2022-08-17