Suspicious Change of Path To Screensaver Binary (via registry_event)

title: Suspicious Change of Path To Screensaver Binary (via registry_event)
id: 1e1b6828-5ebb-5751-b49e-ed893274369f
status: stable
description: This rule detects value modification of registry key containing path to binary used as screensaver.
references:
    - https://attack.mitre.org/techniques/T1546/002/
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1546.002/T1546.002.md
    - https://www.welivesecurity.com/wp-content/uploads/2017/08/eset-gazer.pdf
author: Huntrule Team
date: 2026-01-08
tags:
    - attack.persistence
    - attack.privilege-escalation
    - attack.t1546.002
logsource:
    category: registry_event
    product: windows
detection:
    selection:
        TargetObject|endswith: '\Control Panel\Desktop\SCRNSAVE.EXE'
    filter:
        Image|endswith:
            - '\rundll32.exe'
            - '\explorer.exe'
    condition: selection and not filter
falsepositives:
    - Unknown
level: medium