Default RDP Port Changed to Non Standard Port

 Original Source: [Sigma source]
Title: Default RDP Port Changed to Non Standard Port
Status: test
Description:Detects changes to the default RDP port. Remote desktop is a common feature in operating systems. It allows a user to log into a remote system using an interactive session with a graphical user interface. Microsoft refers to its implementation of the Remote Desktop Protocol (RDP) as Remote Desktop Services (RDS).
References:
  -https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1021.001/T1021.001.md
Author: frack113
Date: 2022-01-01
modified:2024-03-25
Tags:
  • -'attack.privilege-escalation'
  • -'attack.persistence'
  • -'attack.t1547.010'
Logsource:
  • category: registry_set
  • product: windows
Detection:
  selection:
    TargetObject|endswith: '\Control\Terminal Server\WinStations\RDP-Tcp\PortNumber'
  filter_main_port:
    Details: 'DWORD (0x00000d3d)'
  condition:selection and not 1 of filter_main_*
Falsepositives:
  -Unknown
Level: high