Suspicious X509Enrollment - Ps Script (via ps_script)

title: Suspicious X509Enrollment - Ps Script (via ps_script)
id: 017e937f-e458-5073-a151-0f72a2b2ea4a
status: stable
description: This rule detects use of X509Enrollment
references:
    - https://attack.mitre.org/techniques/T1553/004/
    - https://speakerdeck.com/heirhabarov/hunting-for-powershell-abuse?slide=42
    - https://speakerdeck.com/heirhabarov/hunting-for-powershell-abuse?slide=41
    - https://learn.microsoft.com/en-us/dotnet/api/microsoft.hpc.scheduler.store.cx509enrollmentwebclassfactoryclass?view=hpc-sdk-5.1.6115
author: Huntrule Team
date: 2026-05-05
tags:
    - attack.defense-impairment
    - attack.t1553.004
logsource:
    product: windows
    category: ps_script
    definition: 'Requirements: Script Block Logging must be enabled'
detection:
    selection:
        ScriptBlockText|contains:
            - 'X509Enrollment.CBinaryConverter'
            - '884e2002-217d-11da-b2a4-000e7bbb2b09'
    condition: selection
falsepositives:
    - Unknown
level: medium