PowerShell Script Block Logging Disabled

Identifies attempts to disable PowerShell Script Block Logging via registry modification. Attackers may disable this logging to conceal their activities in the host and evade detection.

Rule type: eql

Rule indices:

winlogbeat-*
logs-endpoint.events.*
logs-windows.*

Severity: medium

Risk score: 47

Runs every: 5m

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

Maximum alerts per execution: 100

References:

https://admx.help/?Category=Windows_10_2016&Policy=Microsoft.Policies.PowerShell::EnableScriptBlockLogging

Tags:

Elastic
Host
Windows
Threat Detection
Defense Evasion

Version: 1

Rule authors:

Elastic

Rule license: Elastic License v2

Rule query

edit

registry where event.type == "change" and
    registry.path :
        "HKLM\\SOFTWARE\\Policies\\Microsoft\\Windows\\PowerShell\\ScriptBlockLogging\\EnableScriptBlockLogging"
    and registry.data.strings : ("0", "0x00000000")

Framework: MITRE ATT&CK^TM

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 Windows Event Logging
- ID: T1562.002
- Reference URL: https://attack.mitre.org/techniques/T1562/002/

« Symbolic Link to Shadow Copy Created Microsoft Windows Defender Tampering »