Detection rules › Sigma
Default RDP Port Changed to Non Standard Port
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).
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Persistence | T1547.010 Boot or Logon Autostart Execution: Port Monitors |
| Privilege Escalation | T1547.010 Boot or Logon Autostart Execution: Port Monitors |
Event coverage
| Provider | Event ID | Title |
|---|---|---|
| Sysmon | 13 | RegistryEvent (Value Set) |
Stages and Predicates
Stage 1: selection
TargetObject|endswith: '\Control\Terminal Server\WinStations\RDP-Tcp\PortNumber'
Stage 2: not 1 of filter_main_port
Details: 'DWORD (0x00000d3d)'
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
Details | eq |
|
TargetObject | ends_with |
|