43 lines
952 B
YAML
43 lines
952 B
YAML
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title: ShimCache Flush
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ruletype: Sigma
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author: Florian Roth
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date: 2021/02/01
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description: Detects actions that clear the local ShimCache and remove forensic evidence
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detection:
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SELECTION_1:
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EventID: 1
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SELECTION_2:
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CommandLine: '*rundll32*'
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SELECTION_3:
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CommandLine: '*apphelp.dll*'
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SELECTION_4:
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CommandLine:
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- '*ShimFlushCache*'
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- '*#250*'
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SELECTION_5:
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CommandLine: '*kernel32.dll*'
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SELECTION_6:
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CommandLine:
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- '*BaseFlushAppcompatCache*'
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- '*#46*'
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condition: (SELECTION_1 and SELECTION_2 and ((SELECTION_3 and SELECTION_4) or (SELECTION_5
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and SELECTION_6)))
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falsepositives:
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- Unknown
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fields:
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- Image
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- CommandLine
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- ParentCommandLine
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id: b0524451-19af-4efa-a46f-562a977f792e
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level: critical
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logsource:
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category: process_creation
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product: windows
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references:
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- https://medium.com/@blueteamops/shimcache-flush-89daff28d15e
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status: experimental
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tags:
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- attack.defense_evasion
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- attack.t1112
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