Disable Windows Event and Security Logs Using Built-in Tools

Identifies attempts to disable EventLog via the logman Windows utility, PowerShell, or auditpol. This is often done by attackers in an attempt to evade detection on a system.

Rule type: eql

Rule indices:

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

Severity: low

Risk score: 21

Runs every: 5m

Searches indices from: now-9m (https://www.elastic.co/guide/en/elasticsearch/reference/current/common-options.html#date-math[Date Math format], see also Additional look-back time)

Maximum alerts per execution: 100

References:

https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/logman

Tags:

Elastic
Host
Windows
Threat Detection
Defense Evasion

Version: 1

Rule authors:

Elastic
Ivan Ninichuck
Austin Songer

Rule license: Elastic License v2

Rule query

		process where event.type in ("start", "process_started") and

  ((process.name:"logman.exe" or process.pe.original_file_name == "Logman.exe") and
      process.args : "EventLog-*" and process.args : ("stop", "delete")) or

  ((process.name : ("pwsh.exe", "powershell.exe", "powershell_ise.exe") or process.pe.original_file_name in
      ("pwsh.exe", "powershell.exe", "powershell_ise.exe")) and
	process.args : "Set-Service" and process.args: "EventLog" and process.args : "Disabled")  or

  ((process.name:"auditpol.exe" or process.pe.original_file_name == "AUDITPOL.EXE") and process.args : "/success:disable")

Framework: MITRE ATT&CKTM

Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
Technique:
- Name: Indicator Removal on Host
- ID: T1070
- Reference URL: https://attack.mitre.org/techniques/T1070/