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Virus Profile: Downloader.a!bt3!689915F80E3D

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Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 5/15/2012
Date Added: 5/15/2012
Origin: Unknown
Length: 129024
Type: Trojan
Subtype: -
DAT Required: 6712
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!bg.fsg
Length129024 bytes
MD5689915f80e3d314e86e0b12cd6ac3ad9
SHA12a9e3da1c83bdf01f6ecb9982bdc777ca1a59af3


Other Common Detection Aliases

Company NamesDetection Names
ahnlabWin-Trojan/Adload.129024.AI
avastWin32:Trojan-gen
AVG (GriSoft)Downloader.Agent.14.AY
aviraTR/Dldr.Dm.H.4
KasperskyTrojan-Downloader.Win32.Adload.cz
BitDefenderGen:Trojan.Heur.GM.000000E1A0
clamavTrojan.Adload-1606
Dr.WebAdware.Dmedia
eSafe (Alladin)Suspicious file
F-ProtW32/AdloaderX.EOX
Microsoftadware:win32/dmcast
SymantecTrojan.Dropper
EsetWin32/Adware.DM application
normanW32/Adload.FVI
risingTrojan.DL.Win32.Adload.cz
SophosMal/EncPk-ED
Trend MicroTROJ_ADLOAD.IO
vba32Trojan-Downloader.Win32.Adload.ca
V-BusterTrojan.DL.Adload.aqr
Vet (Computer Associates)Win32/VMalum.AEDQ

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


ActivitiesRisk Levels
Attempts to download an executable file from the web.Medium
Modifies Windows firewall settings.Medium
Attempts to add an event to the Windows task scheduler. This could be used to launch programs at pre-defined intervals.Low
No digital signature is presentInformational


McAfee ScansScan Detections
McAfee Betageneric!bg.fsg
McAfee Supportedgeneric!bg.fsg



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:

2a9e3da1c83bdf01f6ecb9982bdc777ca1a59af3

The following files have been added to the system:

  • %TEMP%\mssoak.exe
  • %WINDIR%\tasks\dm_install_program.job
The following registry elements have been created:

  • HKEY_LOCAL_MACHINE\SOFTWARE\SHAREHELPER\
  • HKEY_LOCAL_MACHINE\SOFTWARE\SHAREHELPER\INSTALL\
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\SERVICES\SHAREDACCESS\PARAMETERS\FIREWALLPOLICY\STANDARDPROFILE\AUTHORIZEDAPPLICA\
The following registry elements have been changed:

  • HKEY_LOCAL_MACHINE\SOFTWARE\SHAREHELPER\INSTALL\OEMRUNNEDFLAG = TRUE
  • HKEY_LOCAL_MACHINE\SOFTWARE\SHAREHELPER\INSTALL\OEMURL = http://ulink4.dudu.com/setup/iebar.exe
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\SERVICES\SHAREDACCESS\PARAMETERS\FIREWALLPOLICY\STANDARDPROFILE\AUTHORIZEDAPPLICATIONS\LIST\%TEMP%\2A9E3DA1C83BDF01F6ECB9982BDC777CA1A59AF3 = %TEMP%\2a9e3da1c83bdf01f6ecb9982bdc777ca1a59af3:*:Enabled:DM
The applications attempted the following network connection(s):

  • hxxp://ulink4.dudu.com/setup/*****
   

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.