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Trojan.DownLoader8.59726

Added to the Dr.Web virus database: 2013-05-03

Virus description added:

Technical Information

To ensure autorun and distribution:
Creates or modifies the following files:
  • %ALLUSERSPROFILE%\Start Menu\Programs\Startup\DDHelper.lnk
  • %ALLUSERSPROFILE%\Start Menu\Programs\Startup\DualDesk.lnk
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%PROGRAM_FILES%\DD20.4.8201304202057\DualDesk.exe' = '%PROGRAM_FILES%\DD20.4.8201304202057\DualDesk.exe:*:Enabled:DualDesk-Server'
Creates and executes the following:
  • '%TEMP%\nsq5.tmp\ns10.tmp' REG.EXE DELETE "HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network\DD_Service" /f
  • '%TEMP%\nsq5.tmp\ns11.tmp' REG.EXE DELETE "SYSTEM\CurrentControlSet\Services\DD_Service\Description" /f
  • '%TEMP%\nsq5.tmp\nsE.tmp' REG.EXE DELETE "HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network\DD_Service\Security" /f
  • '%TEMP%\nsq5.tmp\nsF.tmp' REG.EXE DELETE "HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network\DD_Service\Enum" /f
  • '%PROGRAM_FILES%\DD20.4.8201304202057\DualDesk.exe'
  • '%PROGRAM_FILES%\DD20.4.8201304202057\DDHelper.exe'
  • '%TEMP%\nsq5.tmp\ns12.tmp' REG.EXE DELETE "SYSTEM\CurrentControlSet\Services\DD_Service\DependOnService" /f
  • '%TEMP%\nsq5.tmp\ns13.tmp' REG.EXE DELETE "SYSTEM\CurrentControlSet\Services\DD_Service" /f
  • '%TEMP%\nsq5.tmp\nsD.tmp' "netsh.exe" firewall add allowedprogram "%PROGRAM_FILES%\DD20.4.8201304202057\DualDesk.exe" "DualDesk-Server" ENABLE
  • '%TEMP%\nsq5.tmp\ns7.tmp' "sc.exe" stop DD_CAD
  • '%TEMP%\nsq5.tmp\ns8.tmp' "net.exe" stop DD_Service
  • '%TEMP%\nsh3.tmp\DD_don.loadplus.com_5631.exe' /23712953202316403621_Freight Management Systems/0
  • '%TEMP%\nsq5.tmp\ns6.tmp' "sc.exe" stop DD_Service
  • '%TEMP%\nsq5.tmp\nsB.tmp' "sc.exe" delete DD_CAD
  • '%TEMP%\nsq5.tmp\nsC.tmp' "netsh.exe" firewall add allowedprogram "%PROGRAM_FILES%\DD20.4.8201304202057\DualDesk.exe" "DualDesk-Server" ENABLE ALL
  • '%TEMP%\nsq5.tmp\ns9.tmp' "net.exe" stop DD_CAD
  • '%TEMP%\nsq5.tmp\nsA.tmp' "sc.exe" delete DD_Service
Executes the following:
  • '<SYSTEM32>\reg.exe' DELETE "HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network\DD_Service\Enum" /f
  • '<SYSTEM32>\reg.exe' DELETE "HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network\DD_Service" /f
  • '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%PROGRAM_FILES%\DD20.4.8201304202057\DualDesk.exe" "DualDesk-Server" ENABLE
  • '<SYSTEM32>\reg.exe' DELETE "HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network\DD_Service\Security" /f
  • '<SYSTEM32>\reg.exe' DELETE "SYSTEM\CurrentControlSet\Services\DD_Service" /f
  • '<SYSTEM32>\ipconfig.exe' /flushdns
  • '<SYSTEM32>\reg.exe' DELETE "SYSTEM\CurrentControlSet\Services\DD_Service\Description" /f
  • '<SYSTEM32>\reg.exe' DELETE "SYSTEM\CurrentControlSet\Services\DD_Service\DependOnService" /f
  • '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%PROGRAM_FILES%\DD20.4.8201304202057\DualDesk.exe" "DualDesk-Server" ENABLE ALL
  • '<SYSTEM32>\net.exe' stop DD_Service
  • '<SYSTEM32>\net1.exe' stop DD_Service
  • '<SYSTEM32>\sc.exe' stop DD_Service
  • '<SYSTEM32>\sc.exe' stop DD_CAD
  • '<SYSTEM32>\sc.exe' delete DD_Service
  • '<SYSTEM32>\sc.exe' delete DD_CAD
  • '<SYSTEM32>\net.exe' stop DD_CAD
  • '<SYSTEM32>\net1.exe' stop DD_CAD
Modifies file system :
Creates the following files:
  • %TEMP%\nsh3.tmp\ToolBox\DD20.4.8.txt
  • %TEMP%\nsh3.tmp\Configs\DD20.4.8.txt
  • %TEMP%\nsq5.tmp\nsC.tmp
  • %PROGRAM_FILES%\DD20.4.8201304202057\StopDD.reg
  • %TEMP%\nsq5.tmp\nsD.tmp
  • %PROGRAM_FILES%\DD20.4.8201304202057\DDuninst.exe
  • %PROGRAM_FILES%\DD20.4.8201304202057\UnDD.txt
  • %PROGRAM_FILES%\DD20.4.8201304202057\Flag.txt
  • %TEMP%\nsq5.tmp\DualDesk.exe
  • %TEMP%\nsq5.tmp\ddUninst.exe
  • %TEMP%\nsq5.tmp\cad.exe
  • %HOMEPATH%\Desktop\Stop Remote Support.lnk
  • %TEMP%\nsq5.tmp\ns13.tmp
  • %TEMP%\nsq5.tmp\ns12.tmp
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\2316403621[1].txt
  • %PROGRAM_FILES%\DD20.4.8201304202057\ToolBox\DDHelper.lnk
  • %TEMP%\2316403621.txt
  • %TEMP%\nsq5.tmp\ns11.tmp
  • %PROGRAM_FILES%\DD20.4.8201304202057\ToolBox\DualDesk.lnk
  • %HOMEPATH%\Desktop\ToolBox 20.4.8.0.lnk
  • %TEMP%\nsq5.tmp\nsE.tmp
  • %TEMP%\nsq5.tmp\ns10.tmp
  • %TEMP%\nsq5.tmp\nsF.tmp
  • %PROGRAM_FILES%\DD20.4.8201304202057\DD.txt
  • %TEMP%\nsh3.tmp\Icon2.ico
  • %TEMP%\nsh3.tmp\Icon1.ico
  • %TEMP%\nsh3.tmp\Blank.bmp
  • %TEMP%\nsh3.tmp\Splash.dll
  • %TEMP%\nsh3.tmp\Ring.wav
  • %TEMP%\nsh3.tmp\Logo.bmp
  • %TEMP%\nsh3.tmp\DD_don.loadplus.com_5631.exe
  • %TEMP%\nsn2.tmp
  • %TEMP%\nsh3.tmp\ddHelper.exe
  • %TEMP%\nsh3.tmp\Splash.bmp
  • %TEMP%\nsh3.tmp\DD.txt
  • %TEMP%\nsisdt.dll
  • %TEMP%\nsq5.tmp\ns8.tmp
  • %TEMP%\nsq5.tmp\ns7.tmp
  • %TEMP%\nsq5.tmp\ns9.tmp
  • %TEMP%\nsq5.tmp\nsB.tmp
  • %TEMP%\nsq5.tmp\nsA.tmp
  • %TEMP%\nsq5.tmp\ns6.tmp
  • %TEMP%\nsh3.tmp\DD-Done.txt
  • %PROGRAM_FILES%\DD20.4.8201304202057\Advantig.txt
  • %HOMEPATH%\Start Menu\Programs\Administrative Tools\desktop.ini
  • %TEMP%\nsq5.tmp\nsExec.dll
  • %HOMEPATH%\My Documents\My Videos\Desktop.ini
Sets the 'hidden' attribute to the following files:
  • %HOMEPATH%\My Documents\My Videos\Desktop.ini
Deletes the following files:
  • %TEMP%\nsq5.tmp\nsE.tmp
  • %TEMP%\nsq5.tmp\nsF.tmp
  • %TEMP%\nsq5.tmp\nsD.tmp
  • %TEMP%\nsh3.tmp\DD-Done.txt
  • %TEMP%\nsq5.tmp\nsC.tmp
  • %TEMP%\nsq5.tmp\ns10.tmp
  • %TEMP%\nsq5.tmp\cad.exe
  • %TEMP%\nsq5.tmp\nsExec.dll
  • %TEMP%\nsq5.tmp\ns13.tmp
  • %TEMP%\nsq5.tmp\ns11.tmp
  • %TEMP%\nsq5.tmp\ns12.tmp
  • %TEMP%\nsq5.tmp\ns7.tmp
  • %TEMP%\nsq5.tmp\ns8.tmp
  • %TEMP%\nsq5.tmp\ns6.tmp
  • %TEMP%\nsisdt.dll
  • %PROGRAM_FILES%\DD20.4.8201304202057\Advantig.txt
  • %TEMP%\nsq5.tmp\ns9.tmp
  • %PROGRAM_FILES%\DD20.4.8201304202057\UnDD.txt
  • %PROGRAM_FILES%\DD20.4.8201304202057\Flag.txt
  • %PROGRAM_FILES%\DD20.4.8201304202057\DD.txt
  • %TEMP%\nsq5.tmp\nsA.tmp
  • %TEMP%\nsq5.tmp\nsB.tmp
Moves the following files:
  • from %TEMP%\nsh3.tmp\ddHelper.exe to %PROGRAM_FILES%\DD20.4.8201304202057\DDHelper.exe
  • from %TEMP%\nsh3.tmp\DD.txt to %PROGRAM_FILES%\DD20.4.8201304202057\DD.txt
  • from %TEMP%\nsq5.tmp\DualDesk.exe to %PROGRAM_FILES%\DD20.4.8201304202057\DualDesk.exe
  • from %TEMP%\nsq5.tmp\ddUninst.exe to %PROGRAM_FILES%\DD20.4.8201304202057\Uninst.exe
  • from %TEMP%\nsh3.tmp\Ring.wav to %PROGRAM_FILES%\DD20.4.8201304202057\Ring.wav
  • from %TEMP%\nsh3.tmp\Icon1.ico to %PROGRAM_FILES%\DD20.4.8201304202057\icon1.ico
  • from %TEMP%\nsh3.tmp\Logo.bmp to %PROGRAM_FILES%\DD20.4.8201304202057\Logo.bmp
  • from %TEMP%\nsh3.tmp\Blank.bmp to %PROGRAM_FILES%\DD20.4.8201304202057\Blank.bmp
  • from %TEMP%\nsh3.tmp\Icon2.ico to %PROGRAM_FILES%\DD20.4.8201304202057\icon2.ico
Network activity:
Connects to:
  • 'do#.##adplus.com':5631
  • 'www.du###esk.net':80
  • 'localhost':1039
TCP:
HTTP GET requests:
  • www.du###esk.net/unreg/2316403621.txt
UDP:
  • DNS ASK do#.##adplus.com
  • DNS ASK www.du###esk.net
Miscellaneous:
Searches for the following windows:
  • ClassName: 'DualDesk Tray Icon' WindowName: ''
  • ClassName: 'Shell_TrayWnd' WindowName: ''
  • ClassName: 'SysListView32' WindowName: ''
  • ClassName: 'DualDesk desktop sink' WindowName: ''
  • ClassName: '#32770' WindowName: ''

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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  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.

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