VBObfus.cu!F177FA0B33​A1

This page shows details and results of our analysis on the malware VBObfus.cu!F177FA0B33A1

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

7031 (2013-03-31)

Updated DAT

7031 (2013-03-31)

Minimum Engine

5400.1158

File Length

131072

Description Added

2013-04-02

Description Modified

2013-04-02

Malware Proliferation

Characteristics

This is a Trojan

File PropertiesProperty Values
McAfee DetectionVBObfus.cu
Length131072 bytes
MD5f177fa0b33a11a74ee8e033fe595f5a6
SHA119d3033f87a908faf07c8c83299f164995e934ce


Other Common Detection Aliases

Company NamesDetection Names
avastWin32:VB-ADDH [Trj]
AVG (GriSoft)Win32/Cryptor
aviraTR/Jorik.Vobfus.ec.j
KasperskyTrojan.Win32.Vobfus.kfd
BitDefenderGen:Variant.Barys.3889
clamavWIN.Trojan.VB-5371
Dr.WebWin32.HLLW.Autoruner1.16354
F-ProtW32/Vobfus.O.gen!Eldorado
FortiNetW32/Jorik.EGLG!tr
MicrosoftWorm:Win32/Vobfus.FH
SymantecW32.Changeup!gen20
EsetWin32/AutoRun.VB.AWE worm
normanVobfus.AAQC
pandaGeneric Trojan
risingWorm.Win32.FakeFolder.bk
SophosMal/VB-ABHH
Trend MicroWORM_VOBFUS.SM01
vba32Trojan.Vobfus.ioc
V-BusterTrojan.VBGent.Gen.1542 (trojan)
Vet (Computer Associates)Win32/Vobfus.AHV

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
No digital signature is presentInformational


McAfee ScansScan Detections
McAfee BetaVBObfus.cu
McAfee SupportedVBObfus.cu



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:

19D3033F87A908FAF07C8C83299F164995E934CE

The following files have been added to the system:

  • %USERPROFILE%\baupeiy.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\BAUPEIY = %USERPROFILE%\baupeiy.exe /a
  • HKEY_LOCAL_MACHINE\SOFTWARE\POLICIES\MICROSOFT\WINDOWS\WINDOWSUPDATE\AU\NOAUTOUPDATE = 1

The applications attempted the following network connection(s):

  • 255.255.255.***:8003
  • 50.116.28.**:8003

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