Virus Profile: RDN/Downloader.gen.a!F9795E5256D9

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Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 3/15/2013
Date Added: 3/15/2013
Origin: Unknown
Length: 2827965
Type: Trojan
Subtype: Generic
DAT Required: 7014
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
Length2827965 bytes
MD5f9795e5256d965bad62df2ce2d7a7734
SHA1f256b846edccc06e03e1915ef5e59e183fc95f76


Other Common Detection Aliases

Company NamesDetection Names
AVG (GriSoft)Downloader.Generic13.AAOJ
KasperskyTrojan-Downloader.Win32.Kach.awx
BitDefenderGeneric.Dropper.Autoit.794BC4FA
clamavPUA.Win32.Packer.Upx-53
Dr.WebTrojan.Click2.48947
F-ProtW32/Gemax.A.gen!Eldorado
FortiNetW32/Clicker.LOO!tr
MicrosoftTrojan:Win32/Startpage.gen!L
EsetWin32/TrojanClicker.VB.NPQ
normanVBTroj.DARI
risingTrojan.Win32.fedoN.gv
SophosMal/VB-KR
V-BusterTrojan.DL.Kach.Gen.1 (trojan)
Vet (Computer Associates)Win32/AdClicker.DQV

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


ActivitiesRisk Levels
Attempts to launch an instance of Internet Explorer.Low
Enumerates many system files and directories.Low
Displays systray popupsLow
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:

F256B846EDCCC06E03E1915EF5E59E183FC95F76

The following files have been added to the system:

  • %PROGRAMFILES%\¹þ¹þСÓÎÏ·\cht.dll
  • %PROGRAMFILES%\¹þ¹þСÓÎÏ·\reopen.dll
  • %PROGRAMFILES%\¹þ¹þСÓÎÏ·\Skins\»ÒÉ«¹ì¼£.asz
  • C:\sogou_pinyin_mini_5075.exe
  • %PROGRAMFILES%\¹þ¹þСÓÎÏ·\Skins\½ðÊôÖ®ÃÀ.asz
  • %PROGRAMFILES%\¹þ¹þСÓÎÏ·\setup.dll
  • %TEMP%\~DF5331.tmp
  • %PROGRAMFILES%\¹þ¹þСÓÎÏ·\flash.mdb
  • %PROGRAMFILES%\¹þ¹þСÓÎÏ·\828la.exe
  • %PROGRAMFILES%\¹þ¹þСÓÎÏ·\ClientUpdate.exe
  • %PROGRAMFILES%\¹þ¹þСÓÎÏ·\unins000.dat
  • %PROGRAMFILES%\¹þ¹þСÓÎÏ·\Skins\Office2007.asz
  • C:\baidu.exe
  • %PROGRAMFILES%\¹þ¹þСÓÎÏ·\unins000.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\¹þ¹þСÓÎÏ·\¹þ¹þСÓÎÏ·.lnk
  • %PROGRAMFILES%\¹þ¹þСÓÎÏ·\chis.ini
  • %PROGRAMFILES%\¹þ¹þСÓÎÏ·\Skins\¼òÔ¼Ö®ÃÀ.asz
  • %PROGRAMFILES%\¹þ¹þСÓÎÏ·\count.htm
  • %APPDATA%\Microsoft\Internet Explorer\Quick Launch\launch internet explorer browser.iexplore
  • %ALLUSERSPROFILE%\Desktop\¹þ¹þСÓÎÏ·.lnk
  • %PROGRAMFILES%\¹þ¹þСÓÎÏ·\Skins\Office2003.asz
  • %TEMP%\version.ini
  • %PROGRAMFILES%\¹þ¹þСÓÎÏ·\Skins\εÀ¶Ìì¼Ê.asz
  • %ALLUSERSPROFILE%\Start Menu\Programs\¹þ¹þСÓÎÏ·\жÔØ ¹þ¹þСÓÎÏ·.lnk
  • C:\hahagame.exe
  • %PROGRAMFILES%\¹þ¹þСÓÎÏ·\chs.dll
  • %PROGRAMFILES%\¹þ¹þСÓÎÏ·\Skins\À¼É«³Á˼.asz
  • %TEMP%\pinyin_setup.exe
  • %PROGRAMFILES%\¹þ¹þСÓÎÏ·\Skins\Çà´ÐËêÔÂ.asz
  • %PROGRAMFILES%\¹þ¹þСÓÎÏ·\Skins\»³¾ÉľÎÆ.asz
  • %PROGRAMFILES%\¹þ¹þСÓÎÏ·\Skins\¶¬¼¾Áµ¸è.asz
  • %PROGRAMFILES%\¹þ¹þСÓÎÏ·\Skins\½ðÉ«Ä껪.asz
  • %ALLUSERSPROFILE%\Start Menu\Programs\¹þ¹þСÓÎÏ·\¹þ¹þСÓÎÏ· ÍøÕ¾.url

The following files have been deleted:

  • %TEMP%\is-8PNJK.tmp
  • %TEMP%\is-8PNJK.tmp\_isetup

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

  • %TEMP%\is-8PNJK.tmp\_isetup\_RegDLL.tmp
  • %TEMP%\is-8PNJK.tmp\_isetup\_shfoldr.dll
  • C:\reg2.reg
  • %PROGRAMFILES%\¹þ¹þСÓÎÏ·\GameClient.exe
  • C:\Killme.vbs
  • %TEMP%\is-7G0IJ.tmp\hahagame.tmp
  • %TEMP%\autA.tmp
  • %TEMP%\aut9.tmp
  • %TEMP%\aut8.tmp

The following registry elements have been created:

  • HKEY_CURRENT_USER\{E17D4FC0-5564-11D1-83F2-00A0C90DC849}\
  • HKEY_CURRENT_USER\{E17D4FC0-5564-11D1-83F2-00A0C90DC849}\SHELLFOLDER\
  • HKEY_CURRENT_USER\CLSID\
  • HKEY_CURRENT_USER\CLSID\{E17D4FC0-5564-11D1-83F2-00A0C90DC849}\
  • HKEY_CURRENT_USER\SOFTWARE\CLASSES\CLSID\{E17D4FC0-5564-11D1-83F2-00A0C90DC849}\DEFAULTICON\
  • HKEY_CURRENT_USER\SOFTWARE\CLASSES\CLSID\{E17D4FC0-5564-11D1-83F2-00A0C90DC849}\SHELL\????(&O)\
  • HKEY_CURRENT_USER\SOFTWARE\CLASSES\CLSID\{E17D4FC0-5564-11D1-83F2-00A0C90DC849}\SHELL\????(&O)\COMMAND\
  • HKEY_CURRENT_USER\SOFTWARE\CLASSES\CLSID\{E17D4FC0-5564-11D1-83F2-00A0C90DC849}\SHELL\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\INTERNET EXPLORER\INTERNATIONAL\CPMRU\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS SCRIPT HOST\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS SCRIPT HOST\SETTINGS\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\.IEXPLORE\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\CLSID\{E17D4FC0-5564-11D1-83F2-00A0C90DC849}\SHELL\????(&O)\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\CLSID\{E17D4FC0-5564-11D1-83F2-00A0C90DC849}\SHELL\????(&O)\COMMAND\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\CLSID\{E17D4FC0-5564-11D1-83F2-00A0C90DC849}\SHELL\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\IEXPLOREFILE\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\IEXPLOREFILE\CLSID\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\IEXPLOREFILE\DEFAULTICON\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\IEXPLOREFILE\SCRIPTENGINE\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\IEXPLOREFILE\SHELL\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\IEXPLOREFILE\SHELL\OPEN\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\IEXPLOREFILE\SHELL\OPEN\COMMAND\
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\{AFE2D42E-61CB-4ADE-9F03-4845E57D7448}_IS1\

The following registry elements have been changed:

  • HKEY_CURRENT_USER\{E17D4FC0-5564-11D1-83F2-00A0C90DC849}\SHELLFOLDER\ATTRIBUTES = 1
  • HKEY_CURRENT_USER\CLSID\{E17D4FC0-5564-11D1-83F2-00A0C90DC849}\INTROTEXT = Internet Explorer
  • HKEY_CURRENT_USER\CLSID\{E17D4FC0-5564-11D1-83F2-00A0C90DC849}\LOCALIZEDSTRING = Internet Explorer
  • 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\SECONDARY START PAGES = http://www.86on.com/
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\INTERNET EXPLORER\MAIN\START PAGE = http://www.86on.com/
  • 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\CLASSES\CLSID\{E17D4FC0-5564-11D1-83F2-00A0C90DC849}\SHELLFOLDER\ATTRIBUTES = 1
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\IEXPLOREFILE\NEVERSHOWEXT
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\IEXPLOREFILE\SHELL\OPEN\CLSID = {FBF23B40-E3F0-101B-8488-00AA003E56F8}
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\RFC1156AGENT\CURRENTVERSION\PARAMETERS\TRAPPOLLTIMEMILLISECS = 15000
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\{AFE2D42E-61CB-4ADE-9F03-4845E57D7448}_IS1\DISPLAYNAME = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\{AFE2D42E-61CB-4ADE-9F03-4845E57D7448}_IS1\HELPLINK = http://www.hahayouxi.com
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\{AFE2D42E-61CB-4ADE-9F03-4845E57D7448}_IS1\INNO SETUP: APP PATH = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\{AFE2D42E-61CB-4ADE-9F03-4845E57D7448}_IS1\INNO SETUP: DESELECTED TASKS
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\{AFE2D42E-61CB-4ADE-9F03-4845E57D7448}_IS1\INNO SETUP: ICON GROUP = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\{AFE2D42E-61CB-4ADE-9F03-4845E57D7448}_IS1\INNO SETUP: SELECTED TASKS = desktopicon,ads1
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\{AFE2D42E-61CB-4ADE-9F03-4845E57D7448}_IS1\INNO SETUP: SETUP VERSION = 5.2.3
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\{AFE2D42E-61CB-4ADE-9F03-4845E57D7448}_IS1\INNO SETUP: USER = Administrator
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\{AFE2D42E-61CB-4ADE-9F03-4845E57D7448}_IS1\INSTALLDATE = 20121115
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\{AFE2D42E-61CB-4ADE-9F03-4845E57D7448}_IS1\INSTALLLOCATION = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\{AFE2D42E-61CB-4ADE-9F03-4845E57D7448}_IS1\NOMODIFY = 1
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\{AFE2D42E-61CB-4ADE-9F03-4845E57D7448}_IS1\NOREPAIR = 1
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\{AFE2D42E-61CB-4ADE-9F03-4845E57D7448}_IS1\PUBLISHER = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\{AFE2D42E-61CB-4ADE-9F03-4845E57D7448}_IS1\QUIETUNINSTALLSTRING = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\{AFE2D42E-61CB-4ADE-9F03-4845E57D7448}_IS1\UNINSTALLSTRING = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\{AFE2D42E-61CB-4ADE-9F03-4845E57D7448}_IS1\URLINFOABOUT = http://www.hahayouxi.com
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\{AFE2D42E-61CB-4ADE-9F03-4845E57D7448}_IS1\URLUPDATEINFO = http://www.hahayouxi.com

The applications attempted the following network connection(s):

  • hxxp://www.1234.la/*****
  • 211.151.66.***:80
  • 74.86.197.***:80
  • hxxp://u.5136688.com/*****
  • hxxp://ime.sogou.com/dl/*****
  • 123.129.214.*:80
  • hxxp://www.520921.com/**
  • 108.62.33.***:80
  • hxxp://www.sogou.com/pinyin/*****
  • 123.126.68.***: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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