Generic BackDoor!dhm!0612A7FD​9392

This page shows details and results of our analysis on the malware Generic BackDoor!dhm!0612A7FD9392

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

6391 (2011-06-28)

Updated DAT

6391 (2011-06-28)

Minimum Engine

5400.1158

File Length

84992

Description Added

2011-06-28

Description Modified

2011-06-28

Malware Proliferation

Characteristics

This is a Trojan

File PropertiesProperty Values
McAfee DetectionGeneric BackDoor!dhm
Length84992 bytes
MD50612a7fd9392ec2b6d0b2b88c792cc40
SHA17a83a744a8e7f722e32bc439bd195cd9e2c27a19


Other Common Detection Aliases

Company NamesDetection Names
ahnlabDropper/Malware.84992.CL
avastWin32:Malware-gen
aviraTR/StartPage.RR
KasperskyBackdoor.Win32.Phanta.ar
BitDefenderTrojan.Generic.KDV.219854
Dr.WebTrojan.Click1.36477
MicrosoftTrojan:Win32/Popureb.E
SymantecTrojan.Gen
EsetWin32/Ghodow.NAG
normanW32/Suspicious_Gen2.MPFAJ
rising[Suspicious]
SophosMal/Generic-L
vba32Backdoor.Phanta.ar
V-BusterBackdoor.Phanta!P2b/4q+344k

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


ActivitiesRisk Levels
Enumerates many system files and directories.Low
No digital signature is presentInformational


McAfee ScansScan Detections
McAfee BetaGeneric BackDoor!dhm
McAfee SupportedGeneric BackDoor!dhm



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:

0612A7FD9392EC2B6D0B2B88C792CC40_34D02B05224F2ADF24B392BF603BCEDF0D3354F2B94A2FBE6B4987C3

The following files have been added to the system:

  • C:\PulgFile.log
  • %APPDATA%\Microsoft\Internet Explorer\Quick Launch\Internet Explorer.IE
  • %USERPROFILE%\Desktop\Internet Explorer.IE

The following files have been changed:

  • %TEMP%orary Internet Files\Content.IE5\index.dat

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

  • C:\hello_tt.sys
  • %WINDIR%\VC.ini

The following registry elements have been created:

  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\HIDEDESKTOPICONS\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\HIDEDESKTOPICONS\CLASSICSTARTMENU\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\HIDEDESKTOPICONS\NEWSTARTPANEL\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\.IE\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\.JE\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\CLSID\{20D04FE0-3AEA-1069-A2D8-08002B30309D}\SHELL\OPEN\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\CLSID\{20D04FE0-3AEA-1069-A2D8-08002B30309D}\SHELL\OPEN\COMMAND\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\CLSID\{2559A1F4-21D7-11D4-BDAF-00C04F60B9F0}\SHELL\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\CLSID\{2559A1F4-21D7-11D4-BDAF-00C04F60B9F0}\SHELL\OPENHOMEPAGE\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\CLSID\{2559A1F4-21D7-11D4-BDAF-00C04F60B9F0}\SHELL\OPENHOMEPAGE\COMMAND\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\IE\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\IE\DEFAULTICON\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\IE\SHELL\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\IE\SHELL\OPEN\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\IE\SHELL\OPEN\COMMAND\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\JE\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\JE\SHELL\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\JE\SHELL\OPEN\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\JE\SHELL\OPEN\COMMAND\

The following registry elements have been changed:

  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\INTERNET EXPLORER\MAIN\DEFAULT_PAGE_URL = http://123.765321.info
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\INTERNET EXPLORER\MAIN\START PAGE = http://123.765321.info
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\ADVANCED\HIDDEN = 2
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\ADVANCED\HIDEFILEEXT = 1
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\HIDEDESKTOPICONS\CLASSICSTARTMENU\{871C5380-42A0-1069-A2EA-08002B30309D} = 2
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\HIDEDESKTOPICONS\CLASSICSTARTMENU\{871C5380-42A0-1069-A2EA-08002B30309D}.DEFAULT = 49
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\HIDEDESKTOPICONS\NEWSTARTPANEL\{871C5380-42A0-1069-A2EA-08002B30309D} = 2
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\DESKTOP\NAMESPACE\{450D8FBA-AD25-11D0-98A8-0800361B1103}\REMOVAL MESSAGE = @[Domain Removed],-900
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\HIDEDESKTOPICONS\CLASSICSTARTMENU\{871C5380-42A0-1069-A2EA-08002B30309D} = 2
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\HIDEDESKTOPICONS\CLASSICSTARTMENU\{871C5380-42A0-1069-A2EA-08002B30309D}.DEFAULT = 49
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\HIDEDESKTOPICONS\NEWSTARTPANEL\{871C5380-42A0-1069-A2EA-08002B30309D} = 2

The applications attempted the following network connection(s):

  • 27.54.227.***:83
  • hxxp://1.dh818.info:83/2/*****

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