Microsoft Workflow Compiler Execution
Detects invocation of Microsoft Workflow Compiler, which may permit the execution of arbitrary unsigned code.
Sigma rule (View on GitHub)
1title: Microsoft Workflow Compiler Execution
2id: 419dbf2b-8a9b-4bea-bf99-7544b050ec8d
3status: test
4description: Detects invocation of Microsoft Workflow Compiler, which may permit the execution of arbitrary unsigned code.
5references:
6 - https://posts.specterops.io/arbitrary-unsigned-code-execution-vector-in-microsoft-workflow-compiler-exe-3d9294bc5efb
7 - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1218/T1218.md
8 - https://lolbas-project.github.io/lolbas/Binaries/Microsoft.Workflow.Compiler/
9author: Nik Seetharaman, frack113
10date: 2019/01/16
11modified: 2023/02/03
12tags:
13 - attack.defense_evasion
14 - attack.execution
15 - attack.t1127
16 - attack.t1218
17logsource:
18 category: process_creation
19 product: windows
20detection:
21 selection:
22 - Image|endswith: '\Microsoft.Workflow.Compiler.exe'
23 - OriginalFileName: 'Microsoft.Workflow.Compiler.exe'
24 condition: selection
25fields:
26 - CommandLine
27 - ParentCommandLine
28falsepositives:
29 - Legitimate MWC use (unlikely in modern enterprise environments)
30level: medium
References
-
-
Small and highly portable detection tests based on MITRE's ATT&CK. - redcanaryco/atomic-red-team
Read More -
Compile and execute C# or VB.net code in a XOML file referenced in the test.xml file. Microsoft.Workflow.Compiler.exe tests.xml results.xml Use caseCompile and run code Privileges requiredUser Oper...
Read More
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