Default RDP Port Changed to Non Standard Port
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About the rule
Rule Type
Standard
Rule 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).
Severity
Trouble
Rule Requirement
Criteria
Action1:
actionname = "Registry value modified" AND (OBJECTNAME endswith "\Control\Terminal Server\WinStations\RDP-Tcp\PortNumber" OR (OBJECTNAME endswith "\Control\Terminal Server\WinStations\RDP-Tcp" AND OBJECTVALUENAME = "PortNumber")) AND (INFORMATION != "DWORD (0x00000d3d)" AND (CHANGES != 3389 OR NEWTYPE != "REG_DWORD"))
select Action1.HOSTNAME,Action1.MESSAGE,Action1.OBJECTNAME,Action1.PROCESSNAME,Action1.PREVVAL,Action1.CHANGES,Action1.USERNAME,Action1.DOMAIN,Action1.NEWTYPE,Action1.OBJECTVALUENAME,Action1.OLDTYPE
Detection
Execution Mode
realtime
Log Sources
Windows
Author
frack113
