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Virus Profile: Generic BackDoor.bfr!A62050E019AC

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Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 5/9/2012
Date Added: 5/9/2012
Origin: Unknown
Length: 1471581
Type: Trojan
Subtype: -
DAT Required: 6706
Removal Instructions
   
 
 
   

Description

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.

Indication of Infection

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

Methods 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.

   

Virus Characteristics

This is a Trojan

File PropertiesProperty Values
McAfee DetectionGeneric BackDoor.bfr
Length1471581 bytes
MD5a62050e019ac4fe25346073782fe5fdc
SHA147b3e06ba278832910542318db77a6887804bebe


Other Common Detection Aliases

Company NamesDetection Names
EMSI SoftwareTrojan.Win32.Buzus!IK
avastWin32:Malware-gen
AVG (GriSoft)BackDoor.Ircbot.ONK (Trojan horse)
aviraTR/Crypt.ASPM.Gen
KasperskyHEUR:Trojan.Win32.Generic
BitDefenderDropped:Worm.Generic.346853
clamavPUA.Packed.ASPack
Dr.WebBackDoor.Bifrost.57
eSafe (Alladin)Win32.Bifrose.bwt
F-ProtW32/Backdoor2.FCKA
FortiNetW32/Bifrose.AFE!tr.bdr
Microsoftbackdoor:win32/bifrose.gen!b [generic]
SymantecTrojan.Gen
EsetWin32/AutoRun.IRCBot.FC worm
normanW32/Smallworm.AQKN (trojan)
pandaBck/Bifrost.gen
risingBackdoor.Win32.Bifrose.afe
SophosTroj/Agent-JZZ
Trend MicroBKDR_BIFROSE.MIC
vba32Worm.Sircam.cq
Vet (Computer Associates)Win32/Bifrost!generic

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


ActivitiesRisk Levels
Creates one or more shortcuts (.LNK files) to provide user accessible links to start a program usually form the desktop or start menu.Low
Enumerates many system files and directories.Low
Process attempts to call itself recursivelyLow
Adds or modifies Internet Explorer cookiesLow
No digital signature is presentInformational


McAfee ScansScan Detections
McAfee BetaGeneric BackDoor.bfr
McAfee SupportedGeneric BackDoor.bfr



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:

47b3e06ba2788329[private subnet]db77a6887804bebe

The following files have been added to the system:

  • %WINDIR%\SYSTEM32\systen32.exe
  • %USERPROFILE%\Desktop\Bifrost_1.2.1_español.lnk
  • %APPDATA%\addon.dat
  • %WINDIR%\SYSTEM32\klog.dat
The following files were temporarily written to disk then later removed:

  • %TEMP%\RarSFX0\Bifrost.exe
  • %TEMP%\RarSFX0\__tmp_rar_sfx_access_check_888640
  • %TEMP%\RarSFX0\Bifrost 1.2.1 Español .exe
The following registry elements have been created:

  • HKEY_CURRENT_USER\SOFTWARE\SYSTEMS32\
  • HKEY_CURRENT_USER\SOFTWARE\WINRAR SFX\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\.KEY\
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\ACTIVE SETUP\INSTALLED COMPONENTS\{A23150B4-3C39-CAFE-87AB-6EF0FF3D81EE}\
  • HKEY_LOCAL_MACHINE\SOFTWARE\SYSTEMS32\
The following registry elements have been changed:

  • HKEY_CURRENT_USER\SOFTWARE\SYSTEMS32\KLG = 01
  • HKEY_CURRENT_USER\SOFTWARE\SYSTEMS32\PLG1 = [binary data]
  • HKEY_CURRENT_USER\SOFTWARE\WINRAR SFX\C%%ARCHIVOS DE PROGRAMA = %TEMP%\RarSFX0
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\ACTIVE SETUP\INSTALLED COMPONENTS\{A23150B4-3C39-CAFE-87AB-6EF0FF3D81EE}\STUBPATH = %WINDIR%\SYSTEM32\Systen32.exe s
  • HKEY_LOCAL_MACHINE\SOFTWARE\SYSTEMS32\NCK = [binary data]
   

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.