Windows system environment variables modified

This rule is part of a beta feature. To learn more, contact Support.

Classification:

attack

Tactic:

TA0005-defense-evasion

Technique:

T1112-modify-registry

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Goal

Detect modifications of the Windows system environment variables registry key.

Strategy

Various compliance frameworks, including PCI DSS, SOC, and CIS, require monitoring of critical system and configuration files. Microsoft recommends the monitoring of the COM RPC debugging registry key located at ‘HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\Environment’ based on known attack patterns.

Triage and response

  1. Identify which user or process modified the registry key.
  2. If these changes were not authorized, and you cannot confirm the safety of the changes, roll back the host to an acceptable configuration.

Requires Agent version 7.52 or later