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40 lines
1.6 KiB
YAML
40 lines
1.6 KiB
YAML
title: Suspicious Eventlog Clear or Configuration Using Wevtutil
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id: cc36992a-4671-4f21-a91d-6c2b72a2edf5
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description: Detects clearing or configuration of eventlogs uwing wevtutil, powershell and wmic. Might be used by ransomwares during the attack (seen by NotPetya and others)
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author: Ecco, Daniil Yugoslavskiy, oscd.community
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references:
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- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1070/T1070.yaml
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- https://eqllib.readthedocs.io/en/latest/analytics/5b223758-07d6-4100-9e11-238cfdd0fe97.html
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date: 2019/09/26
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modified: 2019/11/11
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tags:
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- attack.defense_evasion
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- attack.t1070
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- car.2016-04-002
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level: high
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logsource:
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category: process_creation
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product: windows
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detection:
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selection_wevtutil_binary:
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Image|endswith: '\wevtutil.exe'
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selection_wevtutil_command:
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CommandLine|contains:
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- 'clear-log' # clears specified log
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- ' cl ' # short version of 'clear-log'
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- 'set-log' # modifies config of specified log. could be uset to set it to a tiny size
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- ' sl ' # short version of 'set-log'
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selection_other_ps:
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Image|endswith: '\powershell.exe'
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CommandLine|contains:
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- 'Clear-EventLog'
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- 'Remove-EventLog'
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- 'Limit-EventLog'
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selection_other_wmic:
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Image|endswith: '\wmic.exe'
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CommandLine|contains: ' ClearEventLog '
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condition: 1 of selection_other_* or (selection_wevtutil_binary and selection_wevtutil_command)
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falsepositives:
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- Admin activity
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- Scripts and administrative tools used in the monitored environment
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