SigmaHQ/rules/windows/process_creation/win_workflow_compiler.yml

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YAML

title: Microsoft Workflow Compiler
status: experimental
description: Detects invocation of Microsoft Workflow Compiler, which may permit the execution of arbitrary unsigned code.
tags:
- attack.defense_evasion
- attack.execution
- attack.t1127
author: Nik Seetharaman
references:
- https://posts.specterops.io/arbitrary-unsigned-code-execution-vector-in-microsoft-workflow-compiler-exe-3d9294bc5efb
logsource:
category: process_creation
product: windows
detection:
selection:
Image: '*\Microsoft.Workflow.Compiler.exe'
condition: selection
fields:
- CommandLine
- ParentCommandLine
falsepositives:
- Legitimate MWC use (unlikely in modern enterprise environments)
level: high