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Virus Profile: RDN/Downloader.gen.a!BB38C03B2671

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Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 2/26/2013
Date Added: 2/26/2013
Origin: Unknown
Length: 122880
Type: Trojan
Subtype: Generic
DAT Required: 6997
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 DetectionRDN/Downloader.gen.a
Length122880 bytes
MD5bb38c03b2671d50f6f42770a4c63c12a
SHA16c4590ff6081c96ba74439e4ac84d1656797d4e5


Other Common Detection Aliases

Company NamesDetection Names
avastWin32:Malware-gen
AVG (GriSoft)Generic31.BURD (Trojan horse)
aviraTR/Crypt.XPACK.Gen
BitDefenderGen:Trojan.Heur.PT.hyW@auINtEo
Dr.WebTrojan.Click2.51123
MicrosoftTrojanDownloader:Win32/Qhost.D
SymantecSuspicious.MH690
EsetNewHeur_PE (probably unknown virus)
normanTroj_Generic.HTKLH
pandaTrj/CI.A
rising[Suspicious]
Trend MicroTROJ_GEN.R47CDBP

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


ActivitiesRisk Levels
Attempts to modify the hosts file. This could be used to map hostnames different IP addresses redirecting traffic to an alternate location.High
Attempts to launch an instance of Internet Explorer.Low
Enumerates many system files and directories.Low
Adds or modifies Internet Explorer cookiesLow
No digital signature is presentInformational


McAfee ScansScan Detections
McAfee BetaRDN/Downloader.gen.a
McAfee SupportedRDN/Downloader.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:

6C4590FF6081C96BA74439E4AC84D1656797D4E5

The following files have been added to the system:

  • %WINDIR%\SYSTEM32\drivers\etc\hosts
  • %WINDIR%\HotzT.ini
  • %WINDIR%\cy12betx.exe

The following registry elements have been created:

  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\INTERNET EXPLORER\INTERNATIONAL\CPMRU\
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\ESENT\PROCESS\CY12BETX\
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\ESENT\PROCESS\CY12BETX\DEBUG\

The following registry elements have been changed:

  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\INTERNET EXPLORER\INTERNATIONAL\W2KLPK = 1
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\INTERNET EXPLORER\INTERNATIONAL\CPMRU\ENABLE = 1
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\INTERNET EXPLORER\INTERNATIONAL\CPMRU\FACTOR = 20
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\INTERNET EXPLORER\INTERNATIONAL\CPMRU\INITHITS = 100
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\INTERNET EXPLORER\INTERNATIONAL\CPMRU\SIZE = 10
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\INTERNET EXPLORER\MAIN\WINDOW_PLACEMENT = [binary data]
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\INTERNET EXPLORER\TOOLBAR\LOCKED = 1
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\ESENT\PROCESS\CY12BETX\DEBUG\TRACE LEVEL
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\RUN\CY12BETX = %WINDIR%\cy12betx.exe
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\SERVICES\EVENTLOG\APPLICATION\ESENT\CATEGORYCOUNT = 16
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\SERVICES\EVENTLOG\APPLICATION\ESENT\CATEGORYMESSAGEFILE = %WINDIR%\SYSTEM32\ESENT.dll
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\SERVICES\EVENTLOG\APPLICATION\ESENT\EVENTMESSAGEFILE = %WINDIR%\SYSTEM32\ESENT.dll
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\SERVICES\EVENTLOG\APPLICATION\ESENT\TYPESSUPPORTED = 7

The applications attempted the following network connection(s):

  • 199.192.155.**:122
  • hxxp://cy12bet.com/*****
  • 199.192.155.**: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.

   

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