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Trojan.DownLoader8.56452

Added to the Dr.Web virus database: 2013-05-01

Virus description added:

Technical Information

To ensure autorun and distribution:
Creates or modifies the following files:
  • %ALLUSERSPROFILE%\Start Menu\Programs\Startup\sapisvr.exe.lnk
  • %ALLUSERSPROFILE%\Start Menu\Programs\Startup\DW20.EXE.lnk
Creates the following services:
  • [<HKLM>\SYSTEM\ControlSet001\Services\3NSNR5] 'Start' = '00000002'
  • [<HKLM>\SYSTEM\ControlSet001\Services\OSLNBF] 'Start' = '00000002'
Malicious functions:
Creates and executes the following:
  • '%PROGRAM_FILES%\HVHHPXNKYXU.exe' JD02F9DVR4KK
  • '%PROGRAM_FILES%\HVHHPXNKYXU.exe' <Full path to virus>
Executes the following:
  • '<SYSTEM32>\reg.exe' ADD "HKCU\Software\Microsoft\Internet Explorer\Main" /v "Display Inline Videos" /t REG_SZ /d no /F
  • '<SYSTEM32>\reg.exe' ADD "HKCU\Software\Microsoft\Internet Explorer\Main" /v Play_Animations /t REG_SZ /d no /F
  • '<SYSTEM32>\reg.exe' ADD "HKCU\Software\Microsoft\Internet Explorer\Main" /v Play_Background_Sounds /t REG_SZ /d no /F
  • '<SYSTEM32>\reg.exe' ADD "HKCU\Software\Microsoft\Internet Explorer\Main" /v "Display Inline Images" /t REG_SZ /d yes /F
  • '<SYSTEM32>\reg.exe' delete HKLM\Software\Microsoft\Windows\CurrentVersion\Run /F
  • '<SYSTEM32>\reg.exe' ADD "HKCU\Software\Microsoft\Internet Explorer\Main" /v "Disable Script Debugger" /t REG_SZ /d yes /F
  • '<SYSTEM32>\reg.exe' ADD "HKCU\Software\Microsoft\Internet Explorer\Main" /v DisableScriptDebuggerIE /t REG_SZ /d yes /F
  • '<SYSTEM32>\regsvr32.exe' /s jscript.dll
  • '<SYSTEM32>\regsvr32.exe' /u /s shimgvw.dll
  • '<SYSTEM32>\sc.exe' create U6C05BinPath= "%PROGRAM_FILES%\7WP056AHLP\GZM1L0W1Z.exe -start" type= own type= interact start= auto DisplayName= NMV0WZJ
  • '<SYSTEM32>\cmd.exe' /c "%PROGRAM_FILES%\WJ3CFLS.bat"
  • '<SYSTEM32>\cmd.exe' /c "%PROGRAM_FILES%\J4FW31BD.bat"
  • '<SYSTEM32>\regsvr32.exe' /u /s vbscript.dll
  • '<SYSTEM32>\regsvr32.exe' /u /s scrrun.dll
  • '<SYSTEM32>\sc.exe' create WZHVLYX3BinPath= "%PROGRAM_FILES%\UC9D5IHLOV4\IG4PMCXBECDU.exe -start" type= own type= interact start= auto DisplayName= PDH2N0MA87
Terminates or attempts to terminate
the following system processes:
  • <SYSTEM32>\drwtsn32.exe
Modifies file system :
Creates the following files:
  • %PROGRAM_FILES%\UC9D5IHLOV4\IG4PMCXBECDU.exe
  • %PROGRAM_FILES%\J4FW31BD.bat
  • %WINDIR%\F8D8RODHWJCX.exe
  • %PROGRAM_FILES%\HVHHPXNKYXU.exe
  • %PROGRAM_FILES%\7WP056AHLP\GZM1L0W1Z.exe
  • %PROGRAM_FILES%\WJ3CFLS.bat
  • %WINDIR%\JYO7OUZR.exe
Deletes the following files:
  • %WINDIR%\Media\Windows XP Logon Sound.wav
  • %WINDIR%\Media\Windows XP Logoff Sound.wav
  • %WINDIR%\Media\Windows XP Minimize.wav
  • %WINDIR%\Media\Windows XP Menu Command.wav
  • %WINDIR%\Media\Windows XP Information Bar.wav
  • %WINDIR%\Media\Windows XP Hardware Fail.wav
  • %WINDIR%\Media\Windows XP Exclamation.wav
  • %WINDIR%\Media\Windows XP Hardware Remove.wav
  • %WINDIR%\Media\Windows XP Hardware Insert.wav
  • %WINDIR%\Media\Windows XP Notify.wav
  • %WINDIR%\Media\Windows XP Shutdown.wav
  • %WINDIR%\Media\Windows XP Ringout.wav
  • %WINDIR%\Media\Windows XP Startup.wav
  • %WINDIR%\Media\Windows XP Start.wav
  • %WINDIR%\Media\Windows XP Ringin.wav
  • %WINDIR%\Media\Windows XP Print complete.wav
  • %WINDIR%\Media\Windows XP Pop-up Blocked.wav
  • %WINDIR%\Media\Windows XP Restore.wav
  • %WINDIR%\Media\Windows XP Recycle.wav
  • %WINDIR%\Media\recycle.wav
  • %WINDIR%\Media\onestop.mid
  • %WINDIR%\Media\ringout.wav
  • %WINDIR%\Media\ringin.wav
  • %WINDIR%\Media\notify.wav
  • %WINDIR%\Media\chord.wav
  • %WINDIR%\Media\chimes.wav
  • %WINDIR%\Media\flourish.mid
  • %WINDIR%\Media\ding.wav
  • %WINDIR%\Media\start.wav
  • %WINDIR%\Media\Windows XP Default.wav
  • %WINDIR%\Media\Windows XP Critical Stop.wav
  • %WINDIR%\Media\Windows XP Error.wav
  • %WINDIR%\Media\Windows XP Ding.wav
  • %WINDIR%\Media\Windows XP Battery Low.wav
  • %WINDIR%\Media\town.mid
  • %WINDIR%\Media\tada.wav
  • %WINDIR%\Media\Windows XP Battery Critical.wav
  • %WINDIR%\Media\Windows XP Balloon.wav
Network activity:
Connects to:
  • '58.#9.58.27':443
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Shell_TrayWnd' WindowName: ''
  • ClassName: 'DKXLEMCSCP' WindowName: 'ogvlpwncmo'

Curing recommendations

  1. If the operating system (OS) can be loaded (either normally or in safe mode), download Dr.Web Security Space and run a full scan of your computer and removable media you use. More about Dr.Web Security Space.
  2. If you cannot boot the OS, change the BIOS settings to boot your system from a CD or USB drive. Download the image of the emergency system repair disk Dr.Web® LiveDisk , mount it on a USB drive or burn it to a CD/DVD. After booting up with this media, run a full scan and cure all the detected threats.
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Use Dr.Web Anti-virus for macOS to run a full scan of your Mac.

After booting up, run a full scan of all disk partitions with Dr.Web Anti-virus for Linux.

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Download by serial number

  1. If the mobile device is operating normally, download and install Dr.Web for Android. Run a full system scan and follow recommendations to neutralize the detected threats.
  2. If the mobile device has been locked by Android.Locker ransomware (the message on the screen tells you that you have broken some law or demands a set ransom amount; or you will see some other announcement that prevents you from using the handheld normally), do the following:
    • Load your smartphone or tablet in the safe mode (depending on the operating system version and specifications of the particular mobile device involved, this procedure can be performed in various ways; seek clarification from the user guide that was shipped with the device, or contact its manufacturer);
    • Once you have activated safe mode, install the Dr.Web for Android onto the infected handheld and run a full scan of the system; follow the steps recommended for neutralizing the threats that have been detected;
    • Switch off your device and turn it on as normal.

Find out more about Dr.Web for Android