Windows: gpresult.exe used to display Group Policy Resultant Set (RSoP)

title: "Windows: gpresult.exe used to display Group Policy Resultant Set (RSoP)"
id: fb98ae0f-6413-4758-84ed-8d5af9ceeb87
status: test
description: This rule identifies when a process invokes the built-in Windows utility gpresult.exe to display Group Policy Resultant Set of Policy (RSoP) information. Attackers may use this to enumerate applied policies and understand security configurations that can impact post-exploitation options. It relies on Windows process creation telemetry, matching gpresult.exe execution with command-line arguments that request detailed RSoP output (/z and /v).
references:
  - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1615/T1615.md
  - https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/gpresult
  - https://unit42.paloaltonetworks.com/emissary-trojan-changelog-did-operation-lotus-blossom-cause-it-to-evolve/
  - https://www.welivesecurity.com/wp-content/uploads/2020/05/ESET_Turla_ComRAT.pdf
  - https://github.com/SigmaHQ/sigma/blob/master/rules/windows/process_creation/proc_creation_win_gpresult_execution.yml
author: frack113, Huntrule Team
date: 2022-05-01
tags:
  - attack.discovery
  - attack.t1615
logsource:
  product: windows
  category: process_creation
detection:
  selection:
    Image|endswith: \gpresult.exe
    CommandLine|contains:
      - /z
      - /v
  condition: selection
falsepositives:
  - Unknown
level: medium
simulation:
  - type: atomic-red-team
    name: Display group policy information via gpresult
    technique: T1615
    atomic_guid: 0976990f-53b1-4d3f-a185-6df5be429d3b
regression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_gpresult_execution/info.yml
license: DRL-1.1
related:
  - id: e56d3073-83ff-4021-90fe-c658e0709e72
    type: derived