39 lines
1.3 KiB
YAML
39 lines
1.3 KiB
YAML
title: Persistence and Execution at Scale via GPO Scheduled Task
|
|
author: Samir Bousseaden
|
|
date: 2019/04/03
|
|
description: Detect lateral movement using GPO scheduled task, usually used to deploy
|
|
ransomware at scale
|
|
detection:
|
|
SELECTION_1:
|
|
EventID: 5145
|
|
SELECTION_2:
|
|
ShareName: \\*\SYSVOL
|
|
SELECTION_3:
|
|
RelativeTargetName: '*ScheduledTasks.xml'
|
|
SELECTION_4:
|
|
Accesses: '*WriteData*'
|
|
SELECTION_5:
|
|
Accesses: '*%%4417*'
|
|
condition: (SELECTION_1 and SELECTION_2 and SELECTION_3 and (SELECTION_4 or SELECTION_5))
|
|
falsepositives:
|
|
- if the source IP is not localhost then it's super suspicious, better to monitor
|
|
both local and remote changes to GPO scheduledtasks
|
|
id: a8f29a7b-b137-4446-80a0-b804272f3da2
|
|
level: high
|
|
logsource:
|
|
definition: The advanced audit policy setting "Object Access > Audit Detailed
|
|
File Share" must be configured for Success/Failure
|
|
product: windows
|
|
service: security
|
|
references:
|
|
- https://twitter.com/menasec1/status/1106899890377052160
|
|
- https://www.secureworks.com/blog/ransomware-as-a-distraction
|
|
tags:
|
|
- attack.persistence
|
|
- attack.lateral_movement
|
|
- attack.t1053
|
|
- attack.t1053.005
|
|
yml_filename: win_gpo_scheduledtasks.yml
|
|
yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/builtin
|
|
|