Sigma Rule Library

Suspicious Windows Trace ETW Session Tamper Via Logman.EXE

Detects the execution of "logman" utility in order to disable or delete Windows trace sessions

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Detection logic

selection_img

- Image|endswith: \logman.exe
- OriginalFileName: Logman.exe

selection_action

CommandLine|contains:
  - "stop "
  - "delete "

selection_service

CommandLine|contains:
  - Circular Kernel Context Logger
  - EventLog-
  - SYSMON TRACE
  - SysmonDnsEtwSession

Condition

all of selection*

Raw YAML

title: Suspicious Windows Trace ETW Session Tamper Via Logman.EXE
id: cd1f961e-0b96-436b-b7c6-38da4583ec00
status: test
description: Detects the execution of "logman" utility in order to disable or delete Windows trace sessions
references:
    - https://twitter.com/0gtweet/status/1359039665232306183?s=21
    - https://ss64.com/nt/logman.html
author: Florian Roth (Nextron Systems)
date: 2021-02-11
modified: 2023-02-21
tags:
    - attack.defense-impairment
    - attack.t1685
    - attack.t1685.005
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\logman.exe'
        - OriginalFileName: 'Logman.exe'
    selection_action:
        CommandLine|contains:
            - 'stop '
            - 'delete '
    selection_service:
        CommandLine|contains:
            - 'Circular Kernel Context Logger'
            - 'EventLog-' # Cover multiple traces starting with EventLog-*
            - 'SYSMON TRACE'
            - 'SysmonDnsEtwSession'
    condition: all of selection*
falsepositives:
    - Legitimate deactivation by administrative staff
    - Installer tools that disable services, e.g. before log collection agent installation
level: high

False positives

  • Legitimate deactivation by administrative staff
  • Installer tools that disable services, e.g. before log collection agent installation

References

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