Possible Persistence Through Logon Scripts - Registry (via registry_set)

title: Possible Persistence Through Logon Scripts - Registry (via registry_set)
id: 789948b4-94a2-5470-b570-574fe8bf5c1a
status: stable
description: This rule detects creation of "UserInitMprLogonScript" registry value that can be used as a persistence method by hostile actors
references:
    - https://attack.mitre.org/techniques/T1037/001/
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1037.001/T1037.001.md
author: Huntrule Team
date: 2026-05-20
tags:
    - attack.privilege-escalation
    - attack.t1037.001
    - attack.persistence
    - attack.lateral-movement
logsource:
    category: registry_set
    product: windows
detection:
    selection:
        TargetObject|contains: 'UserInitMprLogonScript'
    condition: selection
falsepositives:
    - Unknown
level: medium
regression_tests_path: regression_data/rules/windows/registry/registry_set/registry_set_persistence_logon_scripts_userinitmprlogonscript/info.yml
simulation:
    - type: atomic-red-team
      name: Logon Scripts
      technique: T1037.001
      atomic_guid: d6042746-07d4-4c92-9ad8-e644c114a231