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Virus Profile: Generic PWS.ak!C9D770BD1075

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Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 9/16/2012
Date Added: 9/16/2012
Origin: Unknown
Length: 124075
Type: Trojan
Subtype: -
DAT Required: 6837
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 PWS.ak
Length124075 bytes
MD5c9d770bd1075461dd9b1aac7a6a19aa2
SHA1d220bae89acf5447ec7d935a35916192f9fe7201


Other Common Detection Aliases

Company NamesDetection Names
ahnlabWin-Trojan/Magania.107496.B
avastWin32:Kavos
AVG (GriSoft)Worm/AutoRun.EQ
aviraTR/Drop.Agent.ahdz
KasperskyPacked.Win32.Krap.g
BitDefenderTrojan.Generic.1364095
clamavTrojan.Agent-137653
Dr.WebTrojan.PWS.Wsgame.4983
F-ProtW32/Pwstealer.OIE
Microsoftworm:win32/taterf.b
SymantecTrojan.Packed.NsAnti
EsetWin32/PSW.OnLineGames.NMY
normanOnLineGames.IAPV
pandaW32/Lineage.KVR
SophosMal/EncPk-IG
Vet (Computer Associates)Win32/Tnega.PPG

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


ActivitiesRisk Levels
Attempts to load and execute remote code in explorer processHigh
Attempts to write to a memory location of a protected process.High
Attempts to write instructions that detour an existing code path of a previously loaded process.High
Attempts to write to a memory location of a Windows system processHigh
Attempts to load and execute remote code in a previously loaded processMedium
Enumerates process listLow
No digital signature is presentInformational


McAfee ScansScan Detections
McAfee BetaGeneric PWS.ak
McAfee SupportedGeneric PWS.ak



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:

2.EXE

The following files have been added to the system:

  • %WINDIR%\SYSTEM32\cvnmhg0.dll
  • %WINDIR%\SYSTEM32\amvo.exe
The following files were temporarily written to disk then later removed:

  • %TEMP%\d220bae89acf5447ec7d935a35916192f9fe7201
  • C:\autorun.inf
  • %TEMP%\help.rar
  • %WINDIR%\SYSTEM32\drivers\klif.sys
The following registry elements have been created:

  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\CLSID\MADOWN\
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\DOWNLOADMANAGER\
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\SERVICES\KAVSYS\
The following registry elements have been changed:

  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\ADVANCED\HIDDEN = 2
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\ADVANCED\SHOWSUPERHIDDEN = 0
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\POLICIES\EXPLORER\NODRIVETYPEAUTORUN = 145
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\RUN\AMVA = %WINDIR%\SYSTEM32\amvo.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\CLSID\MADOWN\URLINFO = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\ADVANCED\FOLDER\HIDDEN\SHOWALL\CHECKEDVALUE = 0
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\SERVICES\KAVSYS\ERRORCONTROL = 1
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\SERVICES\KAVSYS\IMAGEPATH = \??\%WINDIR%\SYSTEM32\drivers\klif.sys
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\SERVICES\KAVSYS\START = 1
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\SERVICES\KAVSYS\TYPE = 1
The applications attempted the following network connection(s):

  • hxxp://cderd.com/fm4/*****
  • 173.194.33.**:80
  • 141.8.224.**:80
   

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.