PowerShell ADRecon Execution — Sigma Rule

Rule metadata and linked tags

Author: Bhabesh Raj. Source status: test; severity: high. Source dates: 2021-07-16 / 2022-09-06.

{
  "product": "windows",
  "category": "ps_script",
  "definition": "Requirements: Script Block Logging must be enabled"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 7632545c9a4cad86abdab5cc6146a54d247a141750c50a3a6a1b6613e444bf43

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: PowerShell ADRecon Execution
id: bf72941a-cba0-41ea-b18c-9aca3925690d
status: test
description: Detects execution of ADRecon.ps1 for AD reconnaissance which has been reported to be actively used by FIN7
references:
    - https://github.com/sense-of-security/ADRecon/blob/11881a24e9c8b207f31b56846809ce1fb189bcc9/ADRecon.ps1
    - https://bi-zone.medium.com/from-pentest-to-apt-attack-cybercriminal-group-fin7-disguises-its-malware-as-an-ethical-hackers-c23c9a75e319
author: Bhabesh Raj
date: 2021-07-16
modified: 2022-09-06
tags:
    - attack.discovery
    - attack.execution
    - attack.t1059.001
logsource:
    product: windows
    category: ps_script
    definition: 'Requirements: Script Block Logging must be enabled'
detection:
    selection:
        ScriptBlockText|contains:
            - 'Function Get-ADRExcelComOb'
            - 'Get-ADRGPO'
            - 'Get-ADRDomainController'
            - 'ADRecon-Report.xlsx' # Default
    condition: selection
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://github.com/sense-of-security/ADRecon/blob/11881a24e9c8b207f31b56846809ce1fb189bcc9/ADRecon.ps1
• https://bi-zone.medium.com/from-pentest-to-apt-attack-cybercriminal-group-fin7-disguises-its-malware-as-an-ethical-hackers-c23c9a75e319