BackDoor-DMR

This page shows details and results of our analysis on the malware BackDoor-DMR

Overview

This is a trojan detection. Unlike viruses, trojans do not self-replicate. They are spread manually, often under the premise that they are beneficial or wanted. The most common installation methods involve system or security exploitation, and unsuspecting users manually executing unknown programs. Distribution channels include email, malicious or hacked web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.


Minimum DAT

5173 (2007-11-28)

Updated DAT

5285 (2008-04-30)

Minimum Engine

5400.1158

File Length

245,760 bytes

Description Added

2007-11-28

Description Modified

2008-07-04

Malware Proliferation

Characteristics

Upon execution , drop the following files :

  • %WinDir%\afire.dll
  • %WinDir%\afprj.dll
  • %WinDir%\MSWINSCK.OCX
  • %WinDir%\services.exe
  • %WinDir%\setupconfig.dat
    (where %WinDir% is the default Windows directory, for example C:\WINNT, C:\WINDOWS etc.)

Creat the following the Reistry Keys

  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{03CB0254-5974-4AD8-AF33-3470DA3F4289}
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{248DD896-BB45-11CF-9ABC-0080C7E7B78D}
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{0633400F-CC6B-4109-9138-BC1941C8519A}
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{248DD892-BB45-11CF-9ABC-0080C7E7B78D}
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{0633400F-CC6B-4109-9138-BC1941C8519A}
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{248DD892-BB45-11CF-9ABC-0080C7E7B78D}
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{248DD890-BB45-11CF-9ABC-0080C7E7B78D}
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{D9C080B1-FFBC-422F-8F11-28C243DE3F4A}
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AfirePrj.Afire
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\MSWinsock.Winsock
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\MSWinsock.Winsock.1
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\DownloadManager
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\services: "%WinDir%\services.exe"


Try to access the following url:

  • http ://www.ramadacan{removed}.com/

Symptoms

Presence of the files and Registry keys mentioned above

Method of Infection

Trojans do not self-replicate. They spread manually, often under the premise that the executable is something beneficial.
Trojans may also be received as a result of poor security practices, or un-patched machines and vulnerable systems.
Distribution channels include IRC, peer-to-peer networks, email, newsgroups postings, etc.

Removal

All Users:

Please use the following instructions for all supported versions of Windows to remove threats and other potential risks:

1.Disable System Restore .

2.Update to current engine and DAT files for detection and removal.

3.Run a complete system scan.

Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).

1. Please go to the Microsoft Recovery Console and restore a clean MBR.

On windows XP:

Insert the Windows XP CD into the CD-ROM drive and restart the computer.
When the "Welcome to Setup" screen appears, press R to start the Recovery Console.
Select the Windows installation that is compromised and provide the administrator password
Issue 'fixmbr' command to restore the Master Boot Record
Follow onscreen instructions
Reset and remove the CD from CD-ROM drive.


On Windows Vista and 7:

Insert the Windows CD into the CD-ROM drive and restart the computer.
Click on "Repair Your Computer"
When the System Recovery Options dialog comes up, choose the Command Prompt.
Issue 'bootrec /fixmbr' command to restore the Master Boot Record
Follow onscreen instructions
Reset and remove the CD from CD-ROM drive.

Variants