RE: forcdos.exe, msagent directory, DOS or warez??

["sean" <sean () security homeunix org>]

This is a trick used by warez kiddies as well.. you can access these
directories from an ftp client such as FlashFXP etc etc..  
http://madchat.org/netadm/unix.seku/dirbreak.htm  How to break locked
directories


http://members.chello.nl/s.pechler/Backdoor_stealth_proxy_server.htm 

Here is what I have done to get around this problem before:

1. install Serv-u or something of that sort (most likely the program that is
causing the problem is serv-u anyways) and set up a user with the home dir
pointing to C:\winnt\system32\msagent\local\ and then in the ftp client
rename the com1 directory to something else.

2. Once that is done try to open in notepad the Rhododendron.bmp file as it
is most likely a .ini file for the server. If the rename in the FTP client
doesn't work go to step 3.
 
3. Using Win32 Gnu Unix tools like mvdir.exe to move the directory to one
that you are capable of browsing to in Explorer. They can be found here:
http://unxutils.sourceforge.net/ 
Of course you will have to kill the processes that are tied to this
directory or you most likely will get an error. Kill.exe or pskill can be
very helpful for this. 

Some of the "kits" I have seen lately monitor the dirs and replace them and
the .exe's immediately after removing them as well as monitoring the child
processes and respawning them when you kill them. But with any luck you
probably can get rid of it.

Gl HTH
Sean


-----Original Message-----
From: Meidinger Chris [mailto:chris.meidinger () badenit de] 
Sent: Monday, December 08, 2003 6:25 AM
To: 'craig () broadband-computers com'; security-basics () securityfocus com
Subject: RE: forcdos.exe, msagent directory, DOS or warez??

PS: here is a thread about it:
http://hiveminds.info/phpBB/viewtopic.php?t=1803&postdays=0&postorder=asc&st
art=0&sid=fe36e424a21547d6c7e8fd13eb1ff704

I understand now about not being able to access the machine. The only thing
that occurs to me directly to access the file would be to boot into linux,
which would be very difficult considering you have no local access.

Chris Meidinger

-----Original Message-----
From: Craig Broad [mailto:craig () broadband-computers com]
Sent: Friday, December 05, 2003 12:53 AM
To: security-basics () securityfocus com
Subject: forcdos.exe, msagent directory, DOS or warez??


Hi all,

on a box recently moved to a managed network rack (GX networks), over the
last 2 weeks we have noticed strange behaviour.  One of the box's on the
subnet has been maxing out the link's bandwidth, on further investigation,
massive activity was found on ports 63501, 63502, 1734 and other high range
ports.  The behaviour was at least 8 hours of fully limiting output, and
then up to 8 hours of normal level operation and then a return to full
output.  at least ever 3 cycles, there would be a upload to the server at a
limit of abt 512kbps.

using a sniffer (netprobe) the ports were identified, and using fport these
were all linked to a executable called forcdos.exe.  i have searched all
search engines, and have seen not one single link, so i'm assuming it's
something else renamed.  The files has been placed in
C:\winnt\system32\msagent\local\com1\server directory.  We are assuming at
this time it has come in via some SQL exploit.  it look's as a full backdoor
access has been achieved.  Due to the non-local nature of the box, and the
com1 directory name, we have crrently been unable to access the directory to
retrieve the exe file.

The box has been locked down with the windows inbuilt firewall, locking all
tcpip ports not needed.  the exe is still running within the computer, but
is currently unable to get out of the box.

Firstly does anyone have any advice on how to get to this exe file?  I dont
want to just posix rd it, as i want to see the file first, and secondly does
anyone have any idea what this could be?  DOS or Warez?

many thanks for any advice.  if anyone can suggest how to get to the file,
we will make it available for analysis.

-----------
Craig Broad


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