Virus Profile: VBObfus.da!C45D1D1A71EC

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Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 4/6/2013
Date Added: 4/6/2013
Origin: Unknown
Length: 299008
Type: Trojan
Subtype: -
DAT Required: 7036
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 DetectionVBObfus.da
Length299008 bytes
MD5c45d1d1a71ec7bfff8a23712557b6d95
SHA1eb33f1fd4f4300af7e1055769bfac54d4017d9c3


Other Common Detection Aliases

Company NamesDetection Names
avastWin32:VB-ADIT
AVG (GriSoft)Worm/Generic2.CCUJ
aviraTR/Dropper.Gen
KasperskyTrojan.Win32.Diple.fjsw
BitDefenderBackdoor.VB.Agent.GN
Dr.WebTrojan.VbCrypt.81
F-ProtW32/Vobfus.AD.gen!Eldorado
FortiNetW32/VBKrypt.CA!tr
MicrosoftWorm:Win32/Vobfus
SymantecW32.Changeup!gen18
EsetWin32/Pronny.BA worm (variant)
normanVobfus.AMHZ
pandaTrj/VB.JC
risingTrojan.Win32.Generic.12D9A074
SophosW32/Autorun-BXQ
vba32Worm.Autorun
V-BusterTrojan.VBGent.Gen.1617 (trojan)

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


ActivitiesRisk Levels
Modifies Windows explorer file browser's Advanced settings. Sometimes used by malware to make executable files look like documents.Medium
Enumerates many system files and directories.Low
Enumerates process listLow
Process attempts to call itself recursivelyLow
Adds or modifies Internet Explorer cookiesLow
No digital signature is presentInformational


McAfee ScansScan Detections
McAfee BetaVBObfus.da
McAfee SupportedVBObfus.da



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:

EB33F1FD4F4300AF7E1055769BFAC54D4017D9C3

The following files have been added to the system:

  • %USERPROFILE%\puiiko.exe

The following registry elements have been created:

  • HKEY_LOCAL_MACHINE\SOFTWARE\POLICIES\MICROSOFT\WINDOWS\WINDOWSUPDATE\
  • HKEY_LOCAL_MACHINE\SOFTWARE\POLICIES\MICROSOFT\WINDOWS\WINDOWSUPDATE\AU\

The following registry elements have been changed:

  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\ADVANCED\SHOWSUPERHIDDEN = 0
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\RUN\PUIIKO = %USERPROFILE%\puiiko.exe /j
  • HKEY_LOCAL_MACHINE\SOFTWARE\POLICIES\MICROSOFT\WINDOWS\WINDOWSUPDATE\AU\NOAUTOUPDATE = 1

The applications attempted the following network connection(s):

  • 255.255.255.***:8000
  • 50.116.28.**:8000

   

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.

   

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