Windows Defender Disabled via Registry Modificationedit

Identifies modifications to the Windows Defender registry settings to disable the service or set the service to be started manually.

Rule type: eql

Rule indices:

  • winlogbeat-*
  • logs-windows.*

Severity: low

Risk score: 21

Runs every: 5m

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100



  • Elastic
  • Host
  • Windows
  • Threat Detection
  • Defense Evasion

Version: 3

Rule authors:

  • Elastic

Rule license: Elastic License v2

Investigation guideedit

## Triage and analysis

Detections should be investigated to identify if the hosts and users are authorized to use this tool. As this rule detects post-exploitation process activity, investigations into this should be prioritized.

Rule queryedit

registry where event.type in ("creation", "change") and
  ((registry.path:"HKLM\\SOFTWARE\\Policies\\Microsoft\\Windows Defender\\DisableAntiSpyware" and"1") or
  (registry.path:"HKLM\\System\\ControlSet*\\Services\\WinDefend\\Start" and in ("3", "4")))