Phoenix Studio
Convert indexed Sigma rules into analyst-ready detections.
This studio is built around Phoenix's own rule corpus, not a blank editor. Search by title or rule id, choose a local pySigma backend, then reveal pipelines only when you actually need them.
Indexed Rules
3,731
Ready to search
Backends
17
Loaded from pysigma-node
pySigma Versions
10
Newest: 1.3.3
Translation Workspace
Shape the rule before it leaves Phoenix
Tune Translation
Active Rule
Microsoft Workflow Compiler Execution
Target Profile
Splunk
Splunk through pysigma-backend-splunk.
Format Mode
Default
Default pySigma output mode for this backend.
Conversion Output
Microsoft Workflow Compiler Execution
Using Splunk · Default · pySigma 1.3.3
Translation controls
Adjust the rule on the left, then regenerate when you want a fresh backend-native query.
BackendSplunkFormatDefaultVersion1.3.3
title: Microsoft Workflow Compiler Execution
id: 419dbf2b-8a9b-4bea-bf99-7544b050ec8d
status: test
description: |
Detects the execution of Microsoft Workflow Compiler, which may permit the execution of arbitrary unsigned code.
references:
- https://posts.specterops.io/arbitrary-unsigned-code-execution-vector-in-microsoft-workflow-compiler-exe-3d9294bc5efb
- https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1218/T1218.md
- https://lolbas-project.github.io/lolbas/Binaries/Microsoft.Workflow.Compiler/
author: Nik Seetharaman, frack113
date: 2019-01-16
modified: 2023-02-03
tags:
- attack.defense-evasion
- attack.execution
- attack.t1127
- attack.t1218
- detection.threat-hunting
logsource:
category: process_creation
product: windows
detection:
selection:
- Image|endswith: '\Microsoft.Workflow.Compiler.exe'
- OriginalFileName: 'Microsoft.Workflow.Compiler.exe'
condition: selection
falsepositives:
- Legitimate MWC use (unlikely in modern enterprise environments)
level: medium
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules-threat-hunting/windows/process_creation/proc_creation_win_microsoft_workflow_compiler_execution.yml