RE: Terminal Services
From: Ola (lawal_at_shaw.ca)
Date: Sun, 13 Mar 2005 09:08:40 -0700 To: firstname.lastname@example.org, 'AEHeald' <email@example.com>
You can use a tool called TSGrinder to brute force a terminal server using a
dictionary password for the administrator account. I have been playing
around with this tool this weekend and it really rocks. You will find
detailed information from the hammerofgod site:
TSGringer is a "dictionary" based attack tool, but it does have some
interesting features like "l337" conversion, and supports multiple attack
windows from a single dictionary file. It supports multiple password
attempts in the same connection, and allows you to specify how many times to
try a username/password combination within a particular connection.
Note that the tool requires the Microsoft Simulated Terminal Server Client
tool, "roboclient," which may be found here:
Hope this helps.
From: John the Kiwi [mailto:firstname.lastname@example.org]
Sent: March 11, 2005 3:30 PM
Subject: Re: Terminal Services
I don't use any tools for RDP testing. I have thought about writing a
perl script to try and brute force with rdesktop, but thinking about it
is all I have done.
I consider the RDP Protocol to be pretty reliable and secure, there are
some things you can do to obfuscate it.
I normally change the default RDP Port that the server listens on.
There's a registry entry you can change the port 3389 to something else,
I don't have a link handy but you can probably do a search for 3389 in
This has the added benefit of allowing you to publish as many
workstations (XP Professional anyway) behind your NAT as your router
will let you forward ports for. It's not bullet proof, but it defeats
I've also heard you can use ZeBeDee - http://www.winton.org.uk/zebedee/
to add an extra layer of encryption on a different port. I've never had
a customer request it and it adds a lot of complexity for the user but
the example usage I saw made setting it up look pretty straight forward.
John the Kiwi
On Thu, 2005-03-10 at 17:13 -0500, AEHeald wrote:
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> Greetings, group!
> I am de-lurking to inquire if anyone has some pointers on Microsoft
> Terminal Services. I'm testing a client who allows 3389 into their
> terminal server for the Remote Desktop Client.
> Other than the Bad Thing of allowing inbound traffic onto their LAN,
> I'm trying to hunt down ways to enter all the way in. I have seen
> TSCrack referenced, but the program is nowhere to be found.
> Any suggestions gratefully received.
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