Sigma rule: Default RDP Port Changed to Non Standard Port

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-6097b7fb0d8c, updated 2024-03-25T00:00:00.000Z.

Rule

Title
Default RDP Port Changed to Non Standard Port
Status
test
Level
high
Author
frack113
Date
2022-01-01
Modified
2024-03-25
File
rules/windows/registry/registry_set/registry_set_change_rdp_port.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

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).

Log source

product
windows
category
registry_set

Detection

selection:
    TargetObject|endswith: '\Control\Terminal Server\WinStations\RDP-Tcp\PortNumber'
filter_main_port:
    Details: DWORD (0x00000d3d) # 3389
condition: selection and not 1 of filter_main_*

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.privilege-escalation
  • attack.persistence
  • attack.t1547.010

MITRE ATT&CK ids this rule names

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/registry/registry_set/registry_set_change_rdp_port.yml

Sources and licences

  • SigmaHQ

    "Default RDP Port Changed to Non Standard Port" by frack113 (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/registry/registry_set/registry_set_change_rdp_port.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Default RDP Port Changed to Non Standard Port",
entity page, dataset version ref-6097b7fb0d8c, updated 2024-03-25T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/509e84b9-a71a-40e0-834f-05470369bd1e (accessed 2026-11-03).
Underlying source: SigmaHQ rule 509e84b9-a71a-40e0-834f-05470369bd1e, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.