RE: New Trojan
From: Jerry Heidtke (jheidtke_at_fmlh.edu)
Date: 10/26/03
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Date: Sat, 25 Oct 2003 20:07:18 -0500 To: "Jay Castaldo" <fupayme2003@hotmail.com>, <incidents@securityfocus.com>
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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