Sigma medium test sigma

Microsoft Workflow Compiler Execution

Detects the execution of Microsoft Workflow Compiler, which may permit the execution of arbitrary unsigned code.

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Detection Logic

{
  "selection": [
    {
      "Image
| endswith": "\\Microsoft.Workflow.Compiler.exe"
    },
    {
      "OriginalFileName": "Microsoft.Workflow.Compiler.exe"
    }
  ],
  "condition": "selection"
}

False Positives

  • ⚠ Legitimate MWC use (unlikely in modern enterprise environments)

Field Validations

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