IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Windows Defender Disabled via Registry Modification
editWindows Defender Disabled via Registry Modification
editIdentifies 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: 5m
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: 5
Rule authors:
- Elastic
Rule license: Elastic License v2
Investigation guide
edit## 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. ## Config If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2, events will not define `event.ingested` and default fallback for EQL rules was not added until 8.2, so you will need to add a custom pipeline to populate `event.ingested` to @timestamp for this rule to work.
Rule query
editregistry where event.type in ("creation", "change") and
(
(
registry.path:"HKLM\\SOFTWARE\\Policies\\Microsoft\\Windows Defender\\DisableAntiSpyware" and
registry.data.strings: ("1", "0x00000001")
) or
(
registry.path:"HKLM\\System\\*ControlSet*\\Services\\WinDefend\\Start" and
registry.data.strings in ("3", "4", "0x00000003", "0x00000004")
)
)
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
-
Technique:
- Name: Impair Defenses
- ID: T1562
- Reference URL: https://attack.mitre.org/techniques/T1562/
-
Sub-technique:
- Name: Disable or Modify Tools
- ID: T1562.001
- Reference URL: https://attack.mitre.org/techniques/T1562/001/
-
Sub-technique:
- Name: Indicator Blocking
- ID: T1562.006
- Reference URL: https://attack.mitre.org/techniques/T1562/006/