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Virus Profile: ZeroAccess!EF3AB45C5E5A

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Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 5/7/2012
Date Added: 5/7/2012
Origin: Unknown
Length: 352452
Type: Trojan
Subtype: -
DAT Required: 6704
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 Dropper!1rd
Length352452 bytes
MD5ef3ab45c5e5a64701c96b46be0cb12cc
SHA1d2eafe1917d4c109e0cb6df1a26f43f6165c8a2c


Other Common Detection Aliases

Company NamesDetection Names
avastWin32:Dropper-gen
KasperskyPacked.Win32.Katusha.a
MicrosoftTrojanDropper:Win32/Sirefef.B
Trend MicroCryp_Xin2

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 where winlogon residesHigh
Attempts to load and execute remote code in a previously loaded processMedium
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 BetaZeroAccess
McAfee SupportedGeneric Dropper!1rd



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:

d2eafe1917d4c109e0cb6df1a26f43f6165c8a2c

The following files have been added to the system:

  • %WINDIR%\$NtUninstallKB48399$\3260317531\L\akygdmgo
  • %WINDIR%\$NtUninstallKB48399$\3260317531\cfg.ini
  • %WINDIR%\$NtUninstallKB48399$:SummaryInformation
  • %WINDIR%\$NtUninstallKB48399$\3260317531\@
  • %WINDIR%\$NtUninstallKB48399$\2781645784
The following registry elements have been changed:

  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MVKQJDYPRUECKQGRXDR = 1
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\SERVICES\.MRXSMB\IMAGEPATH = \?
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\SERVICES\.MRXSMB\START = 3
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\SERVICES\.MRXSMB\TYPE = 1
The applications attempted the following network connection(s):

  • 178.32.190.***:80
  • 66.90.121.***:80
  • hxxp://uqdxhrvr.cn/*****
  • 208.91.207.**: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.