39 lines
1.1 KiB
YAML
39 lines
1.1 KiB
YAML
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title: Persistence and Execution at Scale via GPO Scheduled Task
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author: Samir Bousseaden
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date: 2019/04/03
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description: Detect lateral movement using GPO scheduled task, usually used to deploy
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ransomware at scale
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detection:
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SELECTION_1:
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EventID: 5145
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SELECTION_2:
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ShareName: \\*\SYSVOL
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SELECTION_3:
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RelativeTargetName: '*ScheduledTasks.xml'
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SELECTION_4:
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Accesses:
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- '*WriteData*'
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- '*%%4417*'
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condition: (SELECTION_1 and SELECTION_2 and SELECTION_3 and SELECTION_4)
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falsepositives:
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- if the source IP is not localhost then it's super suspicious, better to monitor
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both local and remote changes to GPO scheduledtasks
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id: a8f29a7b-b137-4446-80a0-b804272f3da2
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level: high
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logsource:
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definition: The advanced audit policy setting "Object Access > Audit Detailed File
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Share" must be configured for Success/Failure
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product: windows
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service: security
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references:
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- https://twitter.com/menasec1/status/1106899890377052160
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- https://www.secureworks.com/blog/ransomware-as-a-distraction
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status: experimental
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tags:
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- attack.persistence
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- attack.lateral_movement
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- attack.t1053
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- attack.t1053.005
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ruletype: SIGMA
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