HackTool - Certipy Execution — Sigma Rule

Rule metadata and linked tags

Author: pH-T (Nextron Systems), Sittikorn Sangrattanapitak. Source status: test; severity: high. Source dates: 2023-04-17 / 2024-10-08.

{
  "category": "process_creation",
  "product": "windows"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: ba1ff0d2e5f412a81a653fd24a264894aa9821838ffad9620209a08471dca88a

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: HackTool - Certipy Execution
id: 6938366d-8954-4ddc-baff-c830b3ba8fcd
status: test
description: |
    Detects Certipy execution, a tool for Active Directory Certificate Services enumeration and abuse based on PE metadata characteristics and common command line arguments.
references:
    - https://github.com/ly4k/Certipy
    - https://research.ifcr.dk/certipy-4-0-esc9-esc10-bloodhound-gui-new-authentication-and-request-methods-and-more-7237d88061f7
author: pH-T (Nextron Systems), Sittikorn Sangrattanapitak
date: 2023-04-17
modified: 2024-10-08
tags:
    - attack.discovery
    - attack.credential-access
    - attack.t1649
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\Certipy.exe'
        - OriginalFileName: 'Certipy.exe'
        - Description|contains: 'Certipy'
    selection_cli_commands:
        CommandLine|contains:
            - ' account '
            - ' auth '
            # - ' ca ' # Too short to be used with just one CLI
            - ' cert '
            - ' find '
            - ' forge '
            - ' ptt '
            - ' relay '
            - ' req '
            - ' shadow '
            - ' template '
    selection_cli_flags:
        CommandLine|contains:
            - ' -bloodhound'
            - ' -ca-pfx '
            - ' -dc-ip '
            - ' -kirbi'
            - ' -old-bloodhound'
            - ' -pfx '
            - ' -target'
            - ' -template'
            - ' -username '
            - ' -vulnerable'
            - 'auth -pfx'
            - 'shadow auto'
            - 'shadow list'
    condition: selection_img or all of selection_cli_*
falsepositives:
    - Unlikely
level: high

Original YAML and metadata in JSON

False positives

• Unlikely

Source references

• https://github.com/ly4k/Certipy
• https://research.ifcr.dk/certipy-4-0-esc9-esc10-bloodhound-gui-new-authentication-and-request-methods-and-more-7237d88061f7