title: Persistence and Execution at scale via GPO scheduled task
id: a8f29a7b-b137-4446-80a0-b804272f3da2
description: Detect lateral movement using GPO scheduled task, ususally used to deploy ransomware at scale
author: Samir Bousseaden
references:
    - https://twitter.com/menasec1/status/1106899890377052160
tags:
    - attack.persistence
    - attack.lateral_movement
    - attack.t1053
logsource:
    product: windows
    service: security
    description: 'The advanced audit policy setting "Object Access > Audit Detailed File Share" must be configured for Success/Failure'
detection:
    selection:
        EventID: 5145
        ShareName: \\*\SYSVOL
        RelativeTargetName: '*ScheduledTasks.xml'
        Accesses: '*WriteData*'
    condition: selection
falsepositives: 
    - if the source IP is not localhost then it's super suspicious, better to monitor both local and remote changes to GPO scheduledtasks
level: high