Use of Wfc.exe

testmedium
log source: windows · process_creationauthor Christopher Peacock @SecurePeacock, SCYTHE @scythe_iodate 2022-06-01
01

description

What this is, in brief.

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

02

tags

attack.executionattack.stealthattack.t1127
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rule source (YAML)

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.execution
    - attack.stealth
    - 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
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detects techniques (1)

ATT&CK techniques this enables or maps to.

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references

External citations — patches, advisories, analysis.