BackDoor-DUG.a!70212F​8F8886

This page shows details and results of our analysis on the malware BackDoor-DUG.a!70212F8F8886

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 e-mail, malicious or hacked Web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.


Minimum DAT

6220 (2011-01-08)

Updated DAT

6220 (2011-01-08)

Minimum Engine

5400.1158

File Length

723460

Description Added

2011-01-08

Description Modified

2011-01-08

Malware Proliferation

Characteristics

This is a Trojan

File PropertiesProperty Values
McAfee DetectionBackDoor-DUG.a
Length723460 bytes
MD570212f8f88865f4f9bb919383aabc029
SHA17e15dcb2a88ed61d7b9025eb7af3f184d7c35819


Other Common Detection Aliases

Company NamesDetection Names
avastWin32:Prosti-EF [Trj]
AVG (GriSoft)BackDoor.Generic_c.CNM (Trojan horse)
aviraTR/Dldr.Delf.uvk
KasperskyTrojan-Downloader.Win32.Delf.uvk
BitDefenderGeneric.Adw.ScreenBlaz.39F7DB82
clamavTrojan.Scraze
Dr.WebTrojan.DownLoad.40151
F-ProtW32/ScreenBlaze.A2.gen!Eldorado
FortiNetW32/Delf.SCB!tr
MicrosoftBackdoor:Win32/Prosti.AG
SymantecHacktool.Rootkit
EsetWin32/Adware.ScreenBlaze.AA (application)
normanSmalldoor.MAKB (backdoor)
pandaTrj/Downloader.MDW
risingBackdoor.Win32.Prosti.xa
SophosTroj/DwnLdr-HYE
Trend MicroTROJ_DLOAD.SMMO
vba32Trojan-Downloader.Win32.Delf.uvk
V-BusterTrojan.DL.Delphi.BSO (trojan)
Vet (Computer Associates)Win32/SillyDl.RUQ

Other brands and names may be claimed as the property of others.


ActivitiesRisk Levels
Attempts to connect to a medium risk domain that may pose a minor security risk.Medium
Enumerates many system files and directories.Low
Modifies Windows control panel settings.Low
Adds or modifies Internet Explorer cookiesLow
No digital signature is presentInformational


McAfee ScansScan Detections
McAfee BetaBackDoor-DUG.a
McAfee SupportedBackDoor-DUG.a



System Changes

Some path values have been replaced with environment variables as the exact location may vary with different configurations.
e.g.
%WINDIR% = \WINDOWS (Windows 9x/ME/XP/Vista/7), \WINNT (Windows NT/2000)
%PROGRAMFILES% = \Program Files


The following files were analyzed:

7E15DCB2A88ED61D7B9025EB7AF3F184D7C35819

The following files have been added to the system:

  • %TEMP%\32B850.dmp
  • %TEMP%\3142C7.dmp
  • %WINDIR%\scrblaze.scr

The following files were temporarily written to disk then later removed:

  • %WINDIR%\s18273659

The following registry elements have been created:

  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\INTERNET SETTINGS\USER AGENT\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\INTERNET SETTINGS\USER AGENT\POST PLATFORM\

The following registry elements have been changed:

  • HKEY_CURRENT_USER\CONTROL PANEL\DESKTOP\SCRNSAVE.EXE = %WINDIR%\ScrBlaze.scr
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\INTERNET EXPLORER\EXTENSIONS\CMDMAPPING\{92780B25-18CC-41C8-B9BE-3C9C571A8263} = 8193
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\INTERNET EXPLORER\EXTENSIONS\CMDMAPPING\NEXTID = 8194

The applications attempted the following network connection(s):

  • 69.93.188.***:80
  • 67.228.179.***:80
  • 174.132.116.**:80
  • 216.59.38.***:80
  • hxxp://www.screenblaze.com/*****

Symptoms

This symptoms of this detection are the files, registry, and network communication referenced in the characteristics section.

Method of Infection

Trojans do not self-replicate. They are spread manually, often under the premise that the executable is something beneficial. Distribution channels include IRC, peer-to-peer networks, newsgroup postings, e-mail, 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