SigmaHQ/rules/windows/sysmon/sysmon_rdp_settings_hijack.yml

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title: RDP Sensitive Settings Changed
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id: 171b67e1-74b4-460e-8d55-b331f3e32d67
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description: Detects changes to RDP terminal service sensitive settings
references:
- https://blog.menasec.net/2019/02/threat-hunting-rdp-hijacking-via.html
date: 2019/04/03
author: Samir Bousseaden
logsource:
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product: windows
service: sysmon
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detection:
selection_reg:
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EventID: 13
TargetObject:
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- '*\services\TermService\Parameters\ServiceDll*'
- '*\Control\Terminal Server\fSingleSessionPerUser*'
- '*\Control\Terminal Server\fDenyTSConnections*'
condition: selection_reg
tags:
- attack.defense_evasion
falsepositives:
- unknown
level: high