sysmon_rdp_registry_modification.yml

title: RDP Registry Modification
id: 41904ebe-d56c-4904-b9ad-7a77bdf154b3
description: Detects potential malicious modification of the property value of fDenyTSConnections and UserAuthentication to enable remote desktop connections.
status: experimental
date: 2019/09/12
modified: 2019/11/10
author: Roberto Rodriguez @Cyb3rWard0g
references:
    - https://threathunterplaybook.com/notebooks/windows/05_defense_evasion/WIN-190407183310.html
tags:
    - attack.defense_evasion
    - attack.t1112
logsource:
    category: registry_event
    product: windows
detection:
    selection:
        TargetObject|endswith:
            - '\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp\UserAuthentication'
            - '\CurrentControlSet\Control\Terminal Server\fDenyTSConnections'
        Details: 'DWORD (0x00000000)'
    condition: selection
fields:
    - ComputerName
    - Image
    - EventType
    - TargetObject
falsepositives:
    - Unknown
level: high