W32/Virut.gen.a!790A0​C396476

This page shows details and results of our analysis on the malware W32/Virut.gen.a!790A0C396476

Overview

Viruses are self-replicating. They are often spread by a network or by transmission to a removable medium such as a removable disk, writable CD, or USB drive. Viruses may also spread by infecting files on a network file system or a file system that is shared by another computer.


Minimum DAT

6691 (2012-04-24)

Updated DAT

6691 (2012-04-24)

Minimum Engine

5400.1158

File Length

43520

Description Added

2012-04-25

Description Modified

2012-04-25

Malware Proliferation

Characteristics

This is a Virus

File PropertiesProperty Values
McAfee DetectionW32/Virut.gen.a
Length43520 bytes
MD5790a0c396476384600dc34ea72e63663
SHA15391f5d2df4d645de525dee21de110e88dd9c464


Other Common Detection Aliases

Company NamesDetection Names
EMSI SoftwareTrojan.Win32.ServStart!IK
ahnlabWin32/Virut.B
AVG (GriSoft)DDoS.AC (Trojan horse)
aviraW32/Virut.AJ
KasperskyVirus.Win32.Virut.af
BitDefenderWin32.Virtob.6.Gen
clamavW32.Virut-9
Dr.WebBackDoor.Siggen.22027
F-ProtW32/Virut.6547.B
FortiNetW32/Virut.AF
Microsofttrojan:win32/nitol.a
SymantecBackdoor.Trojan
EsetWin32/Virut.AF virus
normanw32/virut.ct
pandaW32/Virutas.FG
risingBackdoor.Win32.Rbot.gcy
SophosW32/Virut-Gen
Trend MicroPE_VIRUT.PAU
vba32Virus.Virut.07
V-BusterWin32.Virut.Gen.4
Vet (Computer Associates)Win32/Virut.6548

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


ActivitiesRisk Levels
Attempts to write to a memory location of a protected process.High
Attempts to write to a memory location of a Windows system processHigh
Attempts to write to a memory location of a previously loaded process.Medium
Enumerates many system files and directories.Low
No digital signature is presentInformational


McAfee ScansScan Detections
McAfee BetaW32/Virut.gen.a
McAfee SupportedW32/Virut.gen.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:

5391f5d2df4d645de525dee21de110e88dd9c464

The following files have been added to the system:

  • %PROGRAMFILES%\Windows Media Player\lpk.dll
  • %PROGRAMFILES%\Outlook Express\lpk.dll
  • %COMMONPROGRAMFILES%\Microsoft Shared\web server extensions\40\bin\lpk.dll
  • %WINDIR%\$MSI31Uninstall_KB893803v2$\lpk.dll
  • %PROGRAMFILES%\MSN\MSNCoreFiles\Setup\lpk.dll
  • %COMMONPROGRAMFILES%\Microsoft Shared\OFFICE11\lpk.dll
  • %PROGRAMFILES%\Windows NT\Pinball\lpk.dll
  • %COMMONPROGRAMFILES%\Microsoft Shared\Web Components\11\lpk.dll
  • %PROGRAMFILES%\Windows NT\Accessories\lpk.dll
  • %COMMONPROGRAMFILES%\Microsoft Shared\Speech\lpk.dll
  • %PROGRAMFILES%\MSN\MSNCoreFiles\lpk.dll
  • %COMMONPROGRAMFILES%\Adobe\Updater6\lpk.dll
  • %PROGRAMFILES%\microsoft frontpage\version3.0\bin\lpk.dll
  • %WINDIR%\$MSI31Uninstall_KB893803v2$\spuninst\lpk.dll
  • %COMMONPROGRAMFILES%\Microsoft Shared\web server extensions\40\_vti_bin\lpk.dll
  • %COMMONPROGRAMFILES%\Microsoft Shared\web server extensions\40\_vti_bin\_vti_aut\lpk.dll
  • %WINDIR%\Help\Tours\mmTour\lpk.dll
  • %PROGRAMFILES%\Adobe\Reader 9.0\Setup Files\{AC76BA86-7AD7-[private subnet]-A92000000001}\lpk.dll
  • %PROGRAMFILES%\Internet Explorer\Connection Wizard\lpk.dll
  • %COMMONPROGRAMFILES%\Adobe\ARM\1.0\lpk.dll
  • %PROGRAMFILES%\Messenger\lpk.dll
  • %PROGRAMFILES%\MSN Gaming Zone\Windows\lpk.dll
  • %WINDIR%\lpk.dll
  • %PROGRAMFILES%\Microsoft Office\OFFICE11\1033\lpk.dll
  • %WINDIR%\inf\lpk.dll
  • %PROGRAMFILES%\Adobe\Reader 9.0\Reader\lpk.dll
  • %PROGRAMFILES%\WinRAR\lpk.dll
  • %WINDIR%\Installer\{350C97B0-3D7C-4EE8-BAA9-00BCB3D54227}\lpk.dll
  • %PROGRAMFILES%\Movie Maker\lpk.dll
  • %COMMONPROGRAMFILES%\Microsoft Shared\MODI\11.0\lpk.dll
  • %COMMONPROGRAMFILES%\Microsoft Shared\DW\lpk.dll
  • %COMMONPROGRAMFILES%\Microsoft Shared\web server extensions\40\_vti_bin\_vti_adm\lpk.dll
  • %PROGRAMFILES%\Microsoft Office\OFFICE11\lpk.dll
  • %COMMONPROGRAMFILES%\Microsoft Shared\Smart Tag\lpk.dll
  • %WINDIR%\Installer\{716E0306-8318-4364-8B8F-0CC4E9376BAC}\lpk.dll
  • %PROGRAMFILES%\NetMeeting\lpk.dll
  • %PROGRAMFILES%\Windows NT\lpk.dll
  • %COMMONPROGRAMFILES%\Microsoft Shared\Source Engine\lpk.dll
  • %WINDIR%\Installer\{901[private subnet]-11D3-8CFE-0150048383C9}\lpk.dll
  • %PROGRAMFILES%\Internet Explorer\lpk.dll
  • %COMMONPROGRAMFILES%\Microsoft Shared\web server extensions\40\isapi\lpk.dll
  • %COMMONPROGRAMFILES%\Microsoft Shared\MSInfo\lpk.dll
  • C:\lpk.dll
  • %WINDIR%\ehome\lpk.dll
  • %WINDIR%\SYSTEM32\ryhxum.exe
  • %WINDIR%\assembly\NativeImages_v2.0.50727_32\dfsvc\c81e85b756fb5d48a2bd385e9631b355\lpk.dll

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

  • %WINDIR%\SYSTEM32\hra33.dll

The following registry elements have been changed:

  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\SERVICES\NATIONALAIKQ\DESCRIPTION = Providestgn a domainw server for NI security.

The applications attempted the following network connection(s):

  • 50.115.34.**:80
  • 100.42.219.*:23317
  • hxxp://www.ody.cc/*****

Symptoms

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

Method of Infection

Viruses are self-replicating. They are often spread by a network or by transmission to a removable medium such as a removable disk, writable CD, or USB drive. Viruses may also spread by infecting files on a network file system or a file system that is shared by another computer.

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