2021-02-01 19:05:28 +00:00
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title: ShimCache Flush
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id: b0524451-19af-4efa-a46f-562a977f792e
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status: experimental
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description: Detects actions that clear the local ShimCache and remove forensic evidence
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references:
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- https://medium.com/@blueteamops/shimcache-flush-89daff28d15e
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tags:
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- attack.defense_evasion
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- attack.t1112
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author: Florian Roth
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date: 2021/02/01
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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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2021-02-01 19:16:31 +00:00
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selection1a:
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2021-02-01 19:05:28 +00:00
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CommandLine|contains|all:
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- 'rundll32'
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- 'apphelp.dll'
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2021-02-01 19:16:31 +00:00
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selection1b:
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CommandLine|contains:
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2021-02-01 19:05:28 +00:00
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- 'ShimFlushCache'
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2021-02-01 19:16:31 +00:00
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- '#250'
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selection2a:
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2021-02-01 19:05:28 +00:00
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CommandLine|contains|all:
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- 'rundll32'
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- 'kernel32.dll'
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2021-02-01 19:16:31 +00:00
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selection2b:
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CommandLine|contains:
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2021-02-01 19:05:28 +00:00
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- 'BaseFlushAppcompatCache'
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2021-02-01 19:16:31 +00:00
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- '#46'
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2021-02-22 16:30:11 +00:00
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condition: ( selection1a and selection1b ) or ( selection2a and selection2b )
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2021-02-01 19:05:28 +00:00
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fields:
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- Image
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- CommandLine
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- ParentCommandLine
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falsepositives:
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- Unknown
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level: critical
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