RDN/Generic Downloader.x!B021008B​D2D0

This page shows details and results of our analysis on the malware RDN/Generic Downloader.x!B021008BD2D0

Overview

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.


Minimum Engine

5600.1067

File Length

2287215

Description Added

2013-07-10

Description Modified

2013-07-10

Malware Proliferation

Characteristics

This is a Trojan

File PropertiesProperty Values
McAfee DetectionRDN/Generic Downloader.x
Length2287215 bytes
MD5b021008bd2d08475c998f2ff270f7633
SHA17e71f0f74d2055151fa16eab167a077f9585af8e


Other Common Detection Aliases

Company NamesDetection Names
ahnlabDownloader/Win32.Agent
avastWin32:Trojan-gen
aviraTR/Dropper.Gen
KasperskyVirus.Win32.Lamer.k
Dr.WebTrojan.KillFiles.8536
FortiNetW32/Obfus.5
MicrosoftTrojan:Win32/Malex
SymantecTrojan Horse
EsetNewHeur_PE
normanwin32:win32/SB/Obfuscated_FA
pandaW32/Knase.C
SophosW32/Belvima-A
Trend MicroTROJ_SPNR.15KL11
vba32Virus.Lamer.K2

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


ActivitiesRisk Levels
Modifies winlogon configuration settings in registryMedium
Adds or modifies winlogon shell registry value. Could be used to launch a program on startup.Medium
Attempts to write file to shared locations.Low
Enumerates many system files and directories.Low
Enumerates process listLow
Adds or modifies Internet Explorer cookiesLow
No digital signature is presentInformational


McAfee ScansScan Detections
McAfee BetaRDN/Generic Downloader.x
McAfee SupportedRDN/Generic Downloader.x



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:

7E71F0F74D2055151FA16EAB167A077F9585AF8E

The following files have been added to the system:

  • %PROGRAMFILES%\Microsoft Office\OFFICE11\OIS.EXE
  • %COMMONPROGRAMFILES%\Microsoft Shared\Source Engine\OSE.EXE
  • %COMMONPROGRAMFILES%\Microsoft Shared\OFFICE11\MSOXMLED.EXE
  • %PROGRAMFILES%\microsoft frontpage\version3.0\bin\OLD30.tmp
  • %PROGRAMFILES%\Adobe\Reader 9.0\Reader\AcroBroker.exe
  • %PROGRAMFILES%\messenger\msmsgsin.exe
  • %COMMONPROGRAMFILES%\Microsoft Shared\web server extensions\40\_vti_bin\OLD24.tmp
  • %PROGRAMFILES%\Adobe\Reader 9.0\Reader\A3DUtility.exe
  • %COMMONPROGRAMFILES%\microsoft shared\web server extensions\40\bin\htimage.exe
  • %PROGRAMFILES%\Microsoft Office\OFFICE11\1033\MSOHELP.EXE
  • %COMMONPROGRAMFILES%\Microsoft Shared\web server extensions\40\_vti_bin\_vti_aut\OLD28.tmp
  • %PROGRAMFILES%\microsoft frontpage\version3.0\bin\fpsrvadm.exe
  • %PROGRAMFILES%\internet explorer\connection wizard\isignup.exe
  • %COMMONPROGRAMFILES%\microsoft shared\dw\dwtrig20.exe
  • %PROGRAMFILES%\internet explorer\connection wizard\icwrmind.exe
  • %PROGRAMFILES%\Adobe\Reader 9.0\Reader\AdobeCollabSync.exe
  • %COMMONPROGRAMFILES%\microsoft shared\web server extensions\40\bin\imagemap.exe
  • %COMMONPROGRAMFILES%\Microsoft Shared\Smart Tag\SmartTagInstall.exe
  • %PROGRAMFILES%\internet explorer\connection wizard\icwtutor.exe
  • %PROGRAMFILES%\internet explorer\connection wizard\icwconn2.exe
  • %COMMONPROGRAMFILES%\microsoft shared\web server extensions\40\bin\fpsrvadm.exe
  • %PROGRAMFILES%\microsoft frontpage\version3.0\bin\OLD2E.tmp
  • %COMMONPROGRAMFILES%\Microsoft Shared\OFFICE11\MSOICONS.EXE
  • %COMMONPROGRAMFILES%\microsoft shared\dw\dw20.exe
  • %PROGRAMFILES%\Microsoft Office\OFFICE11\MSTORE.EXE
  • %COMMONPROGRAMFILES%\microsoft shared\web server extensions\40\bin\fpserver.exe
  • %COMMONPROGRAMFILES%\microsoft shared\web server extensions\40\isapi\fpcount.exe
  • %PROGRAMFILES%\Adobe\Reader 9.0\Reader\PDFPrevHndlrShim.exe
  • %COMMONPROGRAMFILES%\Microsoft Shared\web server extensions\40\_vti_bin\OLD22.tmp
  • %COMMONPROGRAMFILES%\Microsoft Shared\web server extensions\40\_vti_bin\_vti_adm\OLD26.tmp
  • %COMMONPROGRAMFILES%\Adobe\Updater6\Adobe_Updater.exe
  • %PROGRAMFILES%\microsoft frontpage\version3.0\bin\fpsrvwin.exe
  • %COMMONPROGRAMFILES%\microsoft shared\speech\sapisvr.exe
  • %COMMONPROGRAMFILES%\Adobe\Updater6\AdobeUpdaterInstallMgr.exe
  • %COMMONPROGRAMFILES%\Microsoft Shared\MODI\11.0\MSPVIEW.EXE
  • %PROGRAMFILES%\internet explorer\connection wizard\inetwiz.exe
  • %COMMONPROGRAMFILES%\Microsoft Shared\web server extensions\40\bin\OLD20.tmp
  • %PROGRAMFILES%\Internet Explorer\OLD2C.tmp
  • %PROGRAMFILES%\Microsoft Office\OFFICE11\GRAPH.EXE
  • %COMMONPROGRAMFILES%\Microsoft Shared\web server extensions\40\bin\OLD1E.tmp
  • %PROGRAMFILES%\Internet Explorer\Connection Wizard\OLD2A.tmp
  • %PROGRAMFILES%\Adobe\Reader 9.0\Reader\Eula.exe
  • %PROGRAMFILES%\Adobe\Reader 9.0\Reader\AcroRd32Info.exe
  • %PROGRAMFILES%\Microsoft Office\OFFICE11\DSSM.EXE
  • c:\Users exe File.exe
  • %COMMONPROGRAMFILES%\Microsoft Shared\Web Components\11\DFUICOM.EXE
  • %TEMP%\IMT1B.tmp
  • %TEMP%\34324.exe
  • %COMMONPROGRAMFILES%\microsoft shared\msinfo\msinfo32.exe
  • %PROGRAMFILES%\Adobe\Reader 9.0\Setup Files\{AC76BA86-7AD7-[private subnet]-A92000000001}\Setup.exe
  • %PROGRAMFILES%\Adobe\Reader 9.0\Reader\AcroRd32.exe
  • %COMMONPROGRAMFILES%\Microsoft Shared\MSInfo\OINFOP11.EXE
  • %PROGRAMFILES%\Microsoft Office\OFFICE11\MSTORDB.EXE
  • c:\Users exe File.exe
  • %PROGRAMFILES%\Microsoft Office\OFFICE11\EXCEL.EXE
  • %COMMONPROGRAMFILES%\Microsoft Shared\web server extensions\40\bin\OLD1C.tmp
  • %COMMONPROGRAMFILES%\Adobe\ARM\1.0\AdobeARMHelper.exe
  • %PROGRAMFILES%\Adobe\Reader 9.0\Reader\AcroTextExtractor.exe
  • %WINDIR%\SYSTEM32\smrss.exe
  • %PROGRAMFILES%\Microsoft Office\OFFICE11\MSOHTMED.EXE

The following files have been deleted:

  • %COMMONPROGRAMFILES%\microsoft shared\stationery\glacier bkgrd.jpg
  • %PROGRAMFILES%\Microsoft Office\OFFICE11\1033\QUIKANIM.PPT
  • %PROGRAMFILES%\Microsoft Office\MEDIA\CAGCAT10\J0315447.JPG
  • %PROGRAMFILES%\Microsoft Office\OFFICE11\1033\PROTTPLN.DOC
  • %COMMONPROGRAMFILES%\microsoft shared\stationery\maize bkgrd.jpg
  • %COMMONPROGRAMFILES%\microsoft shared\grphflt\ms.jpg
  • %PROGRAMFILES%\messenger\mailtmpl.txt
  • %ALLUSERSPROFILE%\documents\my pictures\sample pictures\sunset.jpg
  • %PROGRAMFILES%\Microsoft Office\OFFICE11\1033\PROTTPLN.PPT
  • %COMMONPROGRAMFILES%\microsoft shared\stationery\sunflower bkgrd.jpg
  • %COMMONPROGRAMFILES%\microsoft shared\stationery\fiesta bkgrd.jpg
  • %PROGRAMFILES%\Microsoft Office\OFFICE11\1033\PROTTPLN.XLS
  • %USERPROFILE%\Desktop\Users Word Document.doc
  • C:\Users Word Document.doc
  • %PROGRAMFILES%\Microsoft Office\MEDIA\CAGCAT10\J0302953.JPG
  • %COMMONPROGRAMFILES%\microsoft shared\stationery\leaves bkgrd.jpg
  • %USERPROFILE%\My Documents\Users Word Document.doc
  • %PROGRAMFILES%\Microsoft Office\OFFICE11\1033\PROTTPLV.DOC
  • C:\Users text file.txt
  • C:\Users Excel Document.xls
  • %COMMONPROGRAMFILES%\microsoft shared\web server extensions\40\bin\fpsread9.txt
  • %PROGRAMFILES%\Microsoft Office\OFFICE11\1033\PROTTPLV.PPT
  • %COMMONPROGRAMFILES%\microsoft shared\stationery\pie charts bkgrd.jpg
  • %PROGRAMFILES%\Microsoft Office\OFFICE11\1033\XL8GALRY.XLS
  • %ALLUSERSPROFILE%\documents\my pictures\sample pictures\water lilies.jpg
  • %PROGRAMFILES%\Microsoft Office\MEDIA\CAGCAT10\J0284916.JPG
  • %ALLUSERSPROFILE%\documents\my pictures\sample pictures\blue hills.jpg
  • %COMMONPROGRAMFILES%\microsoft shared\stationery\nature bkgrd.jpg
  • %PROGRAMFILES%\Adobe\Reader 9.0\Reader\Optional\README.TXT
  • %ALLUSERSPROFILE%\documents\my pictures\sample pictures\winter.jpg
  • %USERPROFILE%\My Documents\Users Excel Document.xls
  • %USERPROFILE%\Desktop\Users text file.txt
  • %USERPROFILE%\Desktop\emaillist.txt
  • %PROGRAMFILES%\Microsoft Office\OFFICE11\1033\PROTTPLV.XLS
  • %COMMONPROGRAMFILES%\microsoft shared\stationery\clear day bkgrd.jpg
  • %USERPROFILE%\Desktop\Users Excel Document.xls
  • %PROGRAMFILES%\Microsoft Office\MEDIA\CAGCAT10\J0302827.JPG
  • %USERPROFILE%\My Documents\Users text file.txt

The following files were temporarily written to disk then later removed:

  • %TEMP%\MPC1A.tmp
  • C:\10340.exe

The following registry elements have been changed:

  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS NT\CURRENTVERSION\WINLOGON\SHELL = Explorer.exe smrss.exe

Symptoms

This symptoms of this detection are the files, registry, and network communication referenced in the characteristics section.

Method 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.

Removal

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.

Variants