IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Disabling Windows Defender Security Settings via PowerShell
editDisabling Windows Defender Security Settings via PowerShell
editIdentifies use of the Set-MpPreference PowerShell command to disable or weaken certain Windows Defender settings.
Rule type: eql
Rule indices:
- winlogbeat-*
- logs-endpoint.events.*
- logs-windows.*
Severity: medium
Risk score: 47
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: 2 (version history)
Added (Elastic Stack release): 7.14.0
Last modified (Elastic Stack release): 7.16.0
Rule authors: Elastic
Rule license: Elastic License v2
Potential false positives
editPlanned Windows Defender configuration changes.
Rule query
editprocess where event.type == "start" and (process.name :
("powershell.exe", "pwsh.exe", "powershell_ise.exe") or
process.pe.original_file_name in ("powershell.exe", "pwsh.dll",
"powershell_ise.exe")) and process.args : "Set-MpPreference" and
process.args : ("-Disable*", "Disabled", "NeverSend", "-Exclusion*")
Threat mapping
editFramework: 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/
Rule version history
edit- Version 2 (7.16.0 release)
-
-
Updated query, changed from:
process where event.type == "start" and (process.name : ("powershell.exe", "pwsh.exe") or process.pe.original_file_name == "PowerShell.EXE") and process.args : "Set-MpPreference" and process.args : ("-Disable*", "Disabled", "NeverSend", "-Exclusion*")
-