Potential Tampering With RDP Related Registry Keys Via Reg.EXE
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About the rule
Rule Type
Standard
Rule Description
Detects the execution of "reg.exe" for enabling/disabling the RDP service on the host by tampering with the 'CurrentControlSet\\Control\\Terminal Server' values
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "Process started" AND ((PROCESSNAME endswith "\reg.exe" OR ORIGINALFILENAME = "reg.exe") AND (COMMANDLINE contains " add " AND COMMANDLINE contains "\CurrentControlSet\Control\Terminal Server" AND COMMANDLINE contains "REG_DWORD" AND COMMANDLINE contains " /f")) AND ((COMMANDLINE contains "Licensing Core" AND COMMANDLINE contains "EnableConcurrentSessions") OR COMMANDLINE contains "WinStations\RDP-Tcp,MaxInstanceCount,fEnableWinStation,TSUserEnabled,TSEnabled,TSAppCompat,IdleWinStationPoolCount,TSAdvertise,AllowTSConnections,fSingleSessionPerUser,fDenyTSConnections") select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
pH-T (Nextron Systems), @Kostastsale, @TheDFIRReport
