PowerShell Defender Threat Severity Default Action Set to 'Allow' or 'NoAction'

Matt Anderson (Huntress)

Detects the use of PowerShell to execute the 'Set-MpPreference' cmdlet to configure Windows Defender's threat severity default action to 'Allow' (value '6') or 'NoAction' (value '9'). This is a highly suspicious configuration change that effectively disables Defender's ability to automatically mitigate threats of a certain severity level. An attacker might use this technique via the command line to bypass defenses before executing payloads.

2025-07-11 00:00:00

None

1e8a9b4d-3c2a-4f9b-8d1e-7c6a5b4f3d2e

attack.defense-evasion attack.t1562.001

Community Rule

Matt Anderson

Merge PR #5528 from @MATTANDERS0N - add rules for defense evasion

2025-07-28