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Virus Profile: Downloader.a!bw3!29D680354078

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Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 5/25/2012
Date Added: 5/25/2012
Origin: Unknown
Length: 181760
Type: Trojan
Subtype: -
DAT Required: 6722
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 DetectionDownloader-CEW.bh
Length181760 bytes
MD529d680354078867cdde10be1770540fe
SHA1eb1797a4e6e61394308623e05f7abccf5cf04c46


Other Common Detection Aliases

Company NamesDetection Names
avastWin32:MalOb-GP
AVG (GriSoft)Downloader.Generic11.BKSL
aviraTR/Dldr.Renos.pgay
KasperskyTrojan.Win32.Arto.cgh
BitDefenderTrojan.Generic.KDV.301911
Dr.WebTrojan.DownLoader4.23779
FortiNetW32/Delf.AT!tr
MicrosoftTrojanDownloader:Win32/Renos.PG
SymantecDownloader
EsetWin32/Kryptik.RAH trojan (variant)
normanW32/Kryptik.AAU
pandaTrj/Renos.gen
risingTrojan.Win32.Generic.129A35D9
SophosMal/EncPk-ACB
vba32Trojan.Arto.cgh
V-BusterTrojan.Kryptik!n0Wfx2FvVN8 (trojan)
Vet (Computer Associates)Win32/Renos.N!generic

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


ActivitiesRisk Levels
Attempts to add an event to the Windows task scheduler. This could be used to launch programs at pre-defined intervals.Low
Enumerates many system files and directories.Low
Attempts to send data or commands via HTTPLow
Process attempts to call itself recursivelyLow
Adds or modifies Internet Explorer cookiesLow
No digital signature is presentInformational


McAfee ScansScan Detections
McAfee BetaDownloader-CEW.bh
McAfee SupportedDownloader-CEW.bh



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:

eb1797a4e6e61394308623e05f7abccf5cf04c46

The following files have been added to the system:

  • %WINDIR%\Tasks\{22116563-108C-42c0-A7CE-60161B75E508}.job
  • %TEMP%\eb1797a4e6e61394308623e05f7abccf5cf04c46.exe
The following registry elements have been created:

  • HKEY_CURRENT_USER\SOFTWARE\8DDYX0ZBPZ\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PREFERENCES\PROXYSETTINGS\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PREFERENCES\PROXYSETTINGS\HTTP\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PREFERENCES\PROXYSETTINGS\MMS\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS MEDIA\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS MEDIA\WMSDK\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS MEDIA\WMSDK\GENERAL\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS MEDIA\WMSDK\REALMS\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\INTERNET SETTINGS\ZONES\\
The following registry elements have been changed:

  • HKEY_CURRENT_USER\SOFTWARE\8DDYX0ZBPZ\BFU0 = 1
  • HKEY_CURRENT_USER\SOFTWARE\8DDYX0ZBPZ\BFUB = 2828145936
  • HKEY_CURRENT_USER\SOFTWARE\8DDYX0ZBPZ\BFUH = 30083534
  • HKEY_CURRENT_USER\SOFTWARE\8DDYX0ZBPZ\BKEH = xC7aKZ+O6wyPlq1krRM4sG7m2LFGsYtHjHOagBf10Uk/n4gL8s8xs9LeD5KQVh3/j+XFFlHTwF6UUl4+Okpff3wm9tcRFqPMYV0GkBEhcuyADazfzeMtkBA=
  • HKEY_CURRENT_USER\SOFTWARE\8DDYX0ZBPZ\BKES = 7SDUIc7NyUn+3v4Q0gYVnlLuzaherrs91Uiwuz65qx9Nk5xk/cwysdaVeIiwR0SEi7WoDWq93ivkK298QjAhKyFXr6IFUaa1ckpl/G0DB7zGcsqayrFNxHEr+lJFj1KolIwiUDTQg25XjHof/8pNTnbXzzT6JoRpEmm0ZfE2AiG3Up6h+tSgnYkEz6RzmpOQIGVkeqXt0/hju5j2J7yfe7CN/aZm4ZzInzEs4J4DkiPfbIeSdzmjrv9vsHnTSzXCLihtKSPEqw6qMT5SvNTUROjUzqQrATQh95NCZEsxwGNexwZd1krf5z0E4+NgnBjv/xVY9CYUNPd1vWJe98gstwz0yYseD2FZc+54SQM8bPhcNn6vCi9gwvFvx9vofmVN4s4DfmD3PeLIZviNg6MIKVQvMKIzdMopTrClEsgwTeeIUJe4dC9JaJL4T5wgT6hUU0dgvqP1isVa10MVXnJxF9i8INcf
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\INTERNET EXPLORER\EXTENSIONS\CMDMAPPING\{92780B25-18CC-41C8-B9BE-3C9C571A8263} = 8193
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\INTERNET EXPLORER\EXTENSIONS\CMDMAPPING\NEXTID = 8194
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PREFERENCES\PROXYSETTINGS\HTTP\PROXYEXCLUDE
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PREFERENCES\PROXYSETTINGS\HTTP\PROXYNAME
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PREFERENCES\PROXYSETTINGS\HTTP\PROXYPORT = 80
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PREFERENCES\PROXYSETTINGS\HTTP\PROXYSTYLE = 1
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PREFERENCES\PROXYSETTINGS\MMS\PROXYEXCLUDE
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PREFERENCES\PROXYSETTINGS\MMS\PROXYNAME
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PREFERENCES\PROXYSETTINGS\MMS\PROXYPORT = 1755
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PREFERENCES\PROXYSETTINGS\MMS\PROXYSTYLE = 0
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS MEDIA\WMSDK\GENERAL\COMPUTERNAME = %COMPUTERNAME%
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS MEDIA\WMSDK\GENERAL\UNIQUEID = {E318FDA2-434D-4A32-9983-505A6490DD6E}
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS MEDIA\WMSDK\GENERAL\VOLUMESERIALNUMBER = 1952645495
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\INTERNET SETTINGS\ZONES\\1601 = 0
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\RUN\8DDYX0ZBPZ = %TEMP%\eb1797a4e6e61394308623e05f7abccf5cf04c46.exe
The applications attempted the following network connection(s):

  • hxxp://newaitz.com/*****
   

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.