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BackDoor-BAC.dll

This page shows details and results of our analysis on the malware BackDoor-BAC.dll

Threat Detail

Malware Type: Trojan

Malware Sub-type: Application extension

Discovery Date: 2004-12-08

Next Steps:

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

4298 (2003-10-15)

Updated DAT

5897 (2010-02-19)

 Minimum Engine

5.1.00

File Length

various

 Description Added

2004-04-21

Description Modified

2007-07-25

Malware Proliferation

Characteristics

Symptoms

For more information on this threat, please see the following description:
http://vil.nai.com/vil/content/v_101152.htm

Method of Infection

This DLL is likely to be installed on the victim machine as part of the BackDoor-BAC backdoor.

For more information on this threat, please see the following description:
http://vil.nai.com/vil/content/v_101152.htm

Removal

All Users:
Use current engine and DAT files for detection and removal.

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).

But in some particular cases, the following steps need to be taken.

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

United States - English