SigmaHQ/rules/windows/builtin/win_susp_eventlog_cleared.yml

title: Eventlog Cleared
id: d99b79d2-0a6f-4f46-ad8b-260b6e17f982
description: One of the Windows Eventlogs has been cleared. 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
date: 2017/01/10
modified: 2020/08/23
tags:
    - attack.defense_evasion
    - attack.t1070           # an old one
    - attack.t1070.001
    - car.2016-04-002
logsource:
    product: windows
detection:
    selection1:
        service: security
        EventID:
            - 517
            - 1102
    selection2:
        service: system
        EventID: 104
        Source: Microsoft-Windows-Eventlog
    condition: selection1 or selection2
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
Consistency between format description and examples - description/comment -> title/description - addition of reference 2017-01-10 21:40:59 +00:00			`title: Eventlog Cleared`
Added UUIDs to rules 2019-11-12 22:12:27 +00:00			`id: d99b79d2-0a6f-4f46-ad8b-260b6e17f982`
Merged 'Eventlog Cleared' and 'Eventlog Cleared Experimental' 2019-02-18 18:03:53 +00:00			`description: One of the Windows Eventlogs has been cleared. e.g. caused by "wevtutil cl" command execution`
Change All "str" references to be "list"to mach schema update 2018-01-27 23:24:16 +00:00			`references:`
			`- https://twitter.com/deviouspolack/status/832535435960209408`
Merged 'Eventlog Cleared' and 'Eventlog Cleared Experimental' 2019-02-18 18:03:53 +00:00			`- https://www.hybrid-analysis.com/sample/027cc450ef5f8c5f653329641ec1fed91f694e0d229928963b30f6b0d7d3a745?environmentId=100`
Added "logsource" sections and new rule 2017-02-18 23:31:59 +00:00			`author: Florian Roth`
fix: fixed missing date fields in remaining files 2020-01-30 15:07:37 +00:00			`date: 2017/01/10`
att&ck tags review: windows/builtin, windows/driver_load, windows/file_event, windows/image_load, windows/other 2020-08-24 23:09:17 +00:00			`modified: 2020/08/23`
Add tags to windows builtin rules 2018-07-24 05:50:32 +00:00			`tags:`
			`- attack.defense_evasion`
att&ck tags review: windows/builtin, windows/driver_load, windows/file_event, windows/image_load, windows/other 2020-08-24 23:09:17 +00:00			`- attack.t1070 # an old one`
			`- attack.t1070.001`
First Pass 2019-06-14 04:15:38 +00:00			`- car.2016-04-002`
Added "logsource" sections and new rule 2017-02-18 23:31:59 +00:00			`logsource:`
Removed lists from log source section 2017-02-19 10:08:23 +00:00			`product: windows`
Example Updates 2016-12-27 13:49:54 +00:00			`detection:`
Update win_susp_eventlog_cleared.yml Added events about security log clearance. Also, I think that the rule "sigma/rules/windows/builtin/win_susp_security_eventlog_cleared.yml" can be deleted. 2020-10-09 13:51:18 +00:00			`selection1:`
			`service: security`
			`EventID:`
			`- 517`
			`- 1102`
			`selection2:`
			`service: system`
Added "logsource" sections and new rule 2017-02-18 23:31:59 +00:00			`EventID: 104`
Specified source to prevent EventID collisions Issue #263 2019-04-01 21:45:55 +00:00			`Source: Microsoft-Windows-Eventlog`
Update win_susp_eventlog_cleared.yml Added events about security log clearance. Also, I think that the rule "sigma/rules/windows/builtin/win_susp_security_eventlog_cleared.yml" can be deleted. 2020-10-09 13:51:18 +00:00			`condition: selection1 or selection2`
First Example Set - Builtin 2016-12-24 11:23:47 +00:00			`falsepositives:`
Update win_susp_eventlog_cleared.yml Added events about security log clearance. Also, I think that the rule "sigma/rules/windows/builtin/win_susp_security_eventlog_cleared.yml" can be deleted. 2020-10-09 13:51:18 +00:00			`- 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`