sigmahighHunting

Important Windows Eventlog Cleared

Detects the clearing of one of the Windows Core Eventlogs. e.g. caused by "wevtutil cl" command execution

MITRE ATT&CK

defense-evasion

Detection Query

selection:
  EventID: 104
  Provider_Name: Microsoft-Windows-Eventlog
  Channel:
    - Microsoft-Windows-PowerShell/Operational
    - Microsoft-Windows-Sysmon/Operational
    - PowerShellCore/Operational
    - Security
    - System
    - Windows PowerShell
condition: selection

Author

Florian Roth (Nextron Systems), Tim Shelton, Nasreddine Bencherchali (Nextron Systems)

Created

2022-05-17

Data Sources

windowssystem

Platforms

windows

References

Tags

attack.defense-evasionattack.t1070.001car.2016-04-002

Raw Content

title: Important Windows Eventlog Cleared
id: 100ef69e-3327-481c-8e5c-6d80d9507556
related:
    - id: a62b37e0-45d3-48d9-a517-90c1a1b0186b
      type: derived
status: test
description: Detects the clearing of one of the Windows Core Eventlogs. e.g. caused by "wevtutil cl" command execution
references:
    - https://twitter.com/deviouspolack/status/832535435960209408
    - https://www.hybrid-analysis.com/sample/027cc450ef5f8c5f653329641ec1fed91f694e0d229928963b30f6b0d7d3a745?environmentId=100
author: Florian Roth (Nextron Systems), Tim Shelton, Nasreddine Bencherchali (Nextron Systems)
date: 2022-05-17
modified: 2023-11-15
tags:
    - attack.defense-evasion
    - attack.t1070.001
    - car.2016-04-002
logsource:
    product: windows
    service: system
detection:
    selection:
        EventID: 104
        Provider_Name: 'Microsoft-Windows-Eventlog'
        Channel:
            - 'Microsoft-Windows-PowerShell/Operational'
            - 'Microsoft-Windows-Sysmon/Operational'
            - 'PowerShellCore/Operational'
            - 'Security'
            - 'System'
            - 'Windows PowerShell'
    condition: selection
falsepositives:
    - Rollout of log collection agents (the setup routine often includes a reset of the local Eventlog)
    - System provisioning (system reset before the golden image creation)
level: high