Detection rules › Sigma
Disable of ETW Trace - Powershell
Detects usage of powershell cmdlets to disable or remove ETW trace sessions
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Stealth | |
| Defense Impairment |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| PowerShell | Event ID 4104: Creating Scriptblock text (MessageNumber of MessageTotal). |
Rule body
title: Disable of ETW Trace - Powershell
id: 115fdba9-f017-42e6-84cf-d5573bf2ddf8
related:
- id: a238b5d0-ce2d-4414-a676-7a531b3d13d6
type: derived
status: test
description: Detects usage of powershell cmdlets to disable or remove ETW trace sessions
references:
- https://medium.com/palantir/tampering-with-windows-event-tracing-background-offense-and-defense-4be7ac62ac63
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-06-28
modified: 2022-11-25
tags:
- attack.stealth
- attack.defense-impairment
- attack.t1070
- attack.t1685
- car.2016-04-002
logsource:
product: windows
category: ps_script
definition: 'Requirements: Script Block Logging must be enabled'
detection:
selection_pwsh_remove: # Autologger provider removal
ScriptBlockText|contains: 'Remove-EtwTraceProvider '
selection_pwsh_set: # Provider “Enable” property modification
ScriptBlockText|contains|all:
- 'Set-EtwTraceProvider '
- '0x11'
condition: 1 of selection*
falsepositives:
- Unknown
level: high
Stages and Predicates
Stage 0: condition
1 of selection*Stage 1: selection_pwsh_remove
selection_pwsh_remove:
ScriptBlockText|contains: 'Remove-EtwTraceProvider '
Stage 2: selection_pwsh_set
selection_pwsh_set:
ScriptBlockText|contains|all:
- 'Set-EtwTraceProvider '
- '0x11'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
ScriptBlockText | match |
| field:"ScriptBlockText" kind:match |