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Elastic Docs ›Elastic Security Solution [7.12] ›Detections and alerts ›Prebuilt rule reference

Windows Defender Disabled via Registry Modification

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Windows Defender Disabled via Registry Modification

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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-endpoint.events.*
  • logs-windows.*

Severity: low

Risk score: 21

Runs every: 5 minutes

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

Maximum alerts per execution: 100

References:

Tags:

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

Version: 1

Added (Elastic Stack release): 7.12.0

Rule authors: Elastic

Rule license: Elastic License v2

Investigation guide

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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 query

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

Threat mapping

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Framework: MITRE ATT&CKTM

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