Eventlog Cleared

 1title: Eventlog Cleared
 2id: a62b37e0-45d3-48d9-a517-90c1a1b0186b
 3related:
 4    - id: f2f01843-e7b8-4f95-a35a-d23584476423
 5      type: obsolete
 6    - id: d99b79d2-0a6f-4f46-ad8b-260b6e17f982
 7      type: derived
 8    - id: 100ef69e-3327-481c-8e5c-6d80d9507556
 9      type: derived
10status: test
11description: One of the Windows Eventlogs has been cleared. e.g. caused by "wevtutil cl" command execution
12references:
13    - https://twitter.com/deviouspolack/status/832535435960209408
14    - https://www.hybrid-analysis.com/sample/027cc450ef5f8c5f653329641ec1fed91f694e0d229928963b30f6b0d7d3a745?environmentId=100
15author: Florian Roth (Nextron Systems)
16date: 2017-01-10
17modified: 2023-11-15
18tags:
19    - attack.defense-evasion
20    - attack.t1070.001
21    - car.2016-04-002
22logsource:
23    product: windows
24    service: system
25detection:
26    selection:
27        EventID: 104
28        Provider_Name: 'Microsoft-Windows-Eventlog'
29    filter_main_covered:
30        # The channels below are already covered by the rule 100ef69e-3327-481c-8e5c-6d80d9507556
31        Channel:
32            - 'Microsoft-Windows-PowerShell/Operational'
33            - 'Microsoft-Windows-Sysmon/Operational'
34            - 'PowerShellCore/Operational'
35            - 'Security'
36            - 'System'
37            - 'Windows PowerShell'
38    condition: selection and not 1 of filter_main_*
39falsepositives:
40    - Rollout of log collection agents (the setup routine often includes a reset of the local Eventlog)
41    - System provisioning (system reset before the golden image creation)
42level: medium