sigmamediumHunting

Use of Wfc.exe

The Workflow Command-line Compiler can be used for AWL bypass and is listed in Microsoft's recommended block rules.

MITRE ATT&CK

defense-evasion

Detection Query

selection:
  - Image|endswith: \wfc.exe
  - OriginalFileName: wfc.exe
condition: selection

Author

Christopher Peacock @SecurePeacock, SCYTHE @scythe_io

Created

2022-06-01

Data Sources

windowsProcess Creation Events

Platforms

windows

References

Tags

attack.defense-evasionattack.t1127

Raw Content

title: Use of Wfc.exe
id: 49be8799-7b4d-4fda-ad23-cafbefdebbc5
status: test
description: The Workflow Command-line Compiler can be used for AWL bypass and is listed in Microsoft's recommended block rules.
references:
    - https://lolbas-project.github.io/lolbas/OtherMSBinaries/Wfc/
    - https://learn.microsoft.com/en-us/windows/security/application-security/application-control/windows-defender-application-control/design/applications-that-can-bypass-wdac
author: 'Christopher Peacock @SecurePeacock, SCYTHE @scythe_io'
date: 2022-06-01
tags:
    - attack.defense-evasion
    - attack.t1127
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        - Image|endswith: '\wfc.exe'
        - OriginalFileName: 'wfc.exe'
    condition: selection
falsepositives:
    - Legitimate use by a software developer
level: medium