RE: New Trojan

[John Ives <jives () socrates Berkeley EDU>]

As has already been mentioned the colon means that it was stored in an
Alternate Data Stream.  Since I don't have anything to add in that
respect, I will suggest a tool for getting to the ADS.  As a part of this
GCWN practical assignment, Ryan Means wrote a Windows Shell Extension for
finding, saving or deleting streams.  The tool (w/ source) can be found at
http://www.giac.org/practical/GCWN/Ryan_Means_GCWN.zip and the
accompanying paper, with a discussion of streams and the tool can be found
at http://www.giac.org/practical/GCWN/Ryan_Means_GCWN.pdf.  Ryan really
did a good job on the paper, and I've been using the tool for a few months
without problem.  In case you are wondering the tool is not a stand-alone
tool and must be installed on the system, but it still can be useful.

John

On Sat, 25 Oct 2003, Jerry Heidtke wrote:

> The trojan is stored in an Alternate Data Stream attached to your C:\WINNT\system32 directory. Most 
> anti-virus/anti-trojan scanners will not be able to detect it there, just as you will not be able to see it in a 
> normal directory listing.
>
> There are tools available to let you see and manipulate an Alternate Data Stream. You may be able to delete it by:
>
> 1. killing the process with Task Manager (or pskill.exe from www.sysinternals.com if Task Manager can't do it),
> 2. deleting the registry keys
> 3. type the following at a command prompt: "echo . > C:\WINNT\system32:acbdhpd.dll (or find a tool to directly delete 
> it, search google for "ntfs+ads"
>
> Hope this helps.
>
> Jerry
>
> -----Original Message-----
> From: Jay Castaldo [mailto:fupayme2003 () hotmail com]
> Sent: Saturday, October 25, 2003 3:18 AM
> To: incidents () securityfocus com
> Subject: New Trojan
>
>
>
>
> I don't know if this is a new trojan or anything, but I have tried doing some research on the Internet and couldn't 
> find anything on it. Well it has two registry entries in my Run, and RunOnce.  Here is the name of both keys acbdhpd 
> and the values are pointing to a file1129 I can not seem to find rundll32 C:\WINNT\system32:acbdhpd.dll,Init 1.  I 
> tried killing my explorer.exe to see if that is reason I can't find it because I am most likely using a trojanized 
> explorer.exe, but I could only find a copy in my temp, I delete through DOS and delete the registry entries to no 
> success, the registry keys appear within 30 seconds and the file pops right back up.  Anybody seen this or can give 
> me some help to get this out without reloading? It has also opened up two TCP, 3799, and 41225 and two UDP ports, 
> 1129, 1241.  Thanks
>
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Network with over 10,000 of the brightest minds in information security
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see demos from more than 250 industry vendors. If your job touches
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http://www.securityfocus.com/sponsor/RSA_incidents_031023
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