38 lines
1.1 KiB
YAML
38 lines
1.1 KiB
YAML
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title: Microsoft Workflow Compiler
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ruletype: Sigma
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author: Nik Seetharaman, frack113
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date: 2019/01/16
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description: Detects invocation of Microsoft Workflow Compiler, which may permit the
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execution of arbitrary unsigned code.
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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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Image: '*\Microsoft.Workflow.Compiler.exe'
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SELECTION_3:
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OriginalFileName: Microsoft.Workflow.Compiler.exe
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SELECTION_4:
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CommandLine: '*.xml*'
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condition: (SELECTION_1 and (SELECTION_2 or (SELECTION_3 and SELECTION_4)))
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falsepositives:
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- Legitimate MWC use (unlikely in modern enterprise environments)
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fields:
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- CommandLine
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- ParentCommandLine
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id: 419dbf2b-8a9b-4bea-bf99-7544b050ec8d
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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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modified: 2021/07/13
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references:
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- https://posts.specterops.io/arbitrary-unsigned-code-execution-vector-in-microsoft-workflow-compiler-exe-3d9294bc5efb
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- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1218/T1218.md
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status: experimental
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tags:
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- attack.defense_evasion
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- attack.execution
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- attack.t1127
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- attack.t1218
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