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Trojan.DownLoader8.36965

Added to the Dr.Web virus database: 2013-04-08

Virus description added:

Technical Information

To ensure autorun and distribution:
Creates the following services:
  • [<HKLM>\SYSTEM\ControlSet001\Services\Cryptvc] 'Start' = '00000002'
  • [<HKLM>\SYSTEM\ControlSet001\Services\Microsoftbill] 'Start' = '00000002'
Malicious functions:
Creates and executes the following:
  • <SYSTEM32>\spool\NTSVC.exe config "Microsoftbill" DisplayName= "Windows Managements Instrumentation Drivers"
  • <SYSTEM32>\wins\NAI.exe stop Cryptvc
  • <SYSTEM32>\spool\NTSVC.exe description Microsoftbill "Component Object Model (COM +) components of the configuration and tracking. If you stop the service, most COM +-based components will not work correctly. If you disable the service, any explicit dependence on its service will not start."
  • <SYSTEM32>\wins\NTSVC.exe stop Cryptvc
  • <SYSTEM32>\spool\NTSVC.exe create Microsoftbill binpath= "<SYSTEM32>\spool\svchost.exe -service" start= auto Displayname= "Windows Managements Instrumentation Drivers"
  • <SYSTEM32>\spool\NTSVC.exe stop Microsoftbill
  • <SYSTEM32>\wins\NTSVC.exe delete LogicalDisk
  • <SYSTEM32>\wins\NTSVC.exe stop LogicalDisk
  • <SYSTEM32>\wins\NTSVC.exe create Cryptvc binpath= "<SYSTEM32>\wins\svchost.exe -service" start= auto Displayname= "Remote Access Auto Connection Managers"
  • <SYSTEM32>\wins\NAI.exe start Cryptvc
  • <SYSTEM32>\wins\NTSVC.exe description Cryptvc "No matter what, when a program or a reference to a remote DNS NetBIOS name or address will create a long-range network connections to"
  • <SYSTEM32>\wins\NTSVC.exe start Cryptvc
  • <SYSTEM32>\wins\svchost.exe -service
  • <SYSTEM32>\spool\svchost.exe -service
  • <SYSTEM32>\spool\NTSVC.exe start Microsoftbill
  • <SYSTEM32>\spool\KZ.exe start Microsoftbill
  • <SYSTEM32>\wins\NTSVC.exe config "Cryptvc" DisplayName= "Remote Access Auto Connection Managers"
  • <SYSTEM32>\wins\NAI.exe stop LogicalDisk
  • <Current directory>\a1g.exe delete RasAuto
  • <Current directory>\a1g.exe stop RasAuto
  • <SYSTEM32>\spool\basic.exe
  • <SYSTEM32>\wins\delphi.exe
  • <Current directory>\a1g.exe delete LogicalDisk
  • <Current directory>\a1g.exe stop LogicalDisk
  • <Current directory>\a1g.exe stop Microsoftbill
  • <Current directory>\a1g.exe stop Cryptvc
  • <Current directory>\a1g.exe config Microsoftbill start= auto
  • <SYSTEM32>\spool\KZ.exe stop Microsoftbill
  • <SYSTEM32>\wins\NAI.exe stop RasAuto
  • <SYSTEM32>\wins\NTSVC.exe delete RasAuto
  • <SYSTEM32>\wins\NTSVC.exe stop RasAuto
  • <Current directory>\a1g.exe config Cryptvc start= auto
  • <Current directory>\a1g.exe start Microsoftbill
  • <Current directory>\a1g.exe start LogicalDisk
  • <Current directory>\a1g.exe start Cryptvc
Executes the following:
  • <SYSTEM32>\attrib.exe +s +h <SYSTEM32>\wins\CCProxy.ini
  • <SYSTEM32>\attrib.exe +s +h <SYSTEM32>\wins\svchost.exe
  • <SYSTEM32>\attrib.exe +s +h <SYSTEM32>\spool\AccInfo.ini
  • <SYSTEM32>\net1.exe stop Cryptvc
  • <SYSTEM32>\attrib.exe +s +h +r <SYSTEM32>\spool\Language
  • <SYSTEM32>\attrib.exe +s +h <SYSTEM32>\spool\CDial.dll
  • <SYSTEM32>\net1.exe start Cryptvc
  • <SYSTEM32>\attrib.exe +s +h <SYSTEM32>\wins\AccInfo.ini
  • <SYSTEM32>\attrib.exe +s +h <SYSTEM32>\wins\CDial.dll
  • <SYSTEM32>\attrib.exe +s +h <SYSTEM32>\wins\uuid.dll
  • <SYSTEM32>\attrib.exe +s +h <SYSTEM32>\wins\web
  • <SYSTEM32>\net1.exe start LogicalDisk
  • <SYSTEM32>\attrib.exe +s +h <SYSTEM32>\spool\CCProxy.ini
  • <SYSTEM32>\net1.exe start Microsoftbill
  • <SYSTEM32>\cmd.exe /c <SYSTEM32>\wins\WS.bat
  • <SYSTEM32>\cmd.exe /c <SYSTEM32>\spool\SL.bat
  • <SYSTEM32>\net1.exe stop RasAuto
  • <SYSTEM32>\attrib.exe +s +h <SYSTEM32>\spool\svchost.exe
  • <SYSTEM32>\attrib.exe +s +h <SYSTEM32>\spool\web
  • <SYSTEM32>\net1.exe stop LogicalDisk
  • <SYSTEM32>\attrib.exe +s +h <SYSTEM32>\spool\uuid.dll
  • <SYSTEM32>\net1.exe stop Microsoftbill
Modifies file system :
Creates the following files:
  • <SYSTEM32>\spool\web\log.htm
  • <SYSTEM32>\wins\uuid.dll
  • <SYSTEM32>\wins\WS.bat
  • <SYSTEM32>\spool\web\settings.htm
  • <SYSTEM32>\spool\web\list.htm
  • <SYSTEM32>\spool\web\acclist.htm
  • <SYSTEM32>\wins\svchost.exe
  • <SYSTEM32>\spool\web\index.html
  • <SYSTEM32>\spool\web\account.htm
  • <SYSTEM32>\spool\AccInfo.ini
  • <SYSTEM32>\spool\uuid.dll
  • <SYSTEM32>\spool\svchost.exe
  • <SYSTEM32>\dllcache\basic.exe
  • <Current directory>\Km.bat
  • <SYSTEM32>\spool\SL.bat
  • <SYSTEM32>\spool\CDial.dll
  • <SYSTEM32>\spool\CCProxy.ini
  • <SYSTEM32>\spool\NTSVC.exe
  • <SYSTEM32>\spool\KZ.exe
  • <SYSTEM32>\spool\web\accheader.htm
  • <SYSTEM32>\wins\web\accheader.htm
  • <SYSTEM32>\wins\web\accadd.htm
  • <SYSTEM32>\wins\web\account.htm
  • <SYSTEM32>\wins\web\acclist.htm
  • <SYSTEM32>\dllcache\delphi.exe
  • <SYSTEM32>\wins\delphi.exe
  • <Current directory>\a1g.exe
  • <SYSTEM32>\spool\basic.exe
  • <SYSTEM32>\wins\web\index.html
  • <SYSTEM32>\wins\NAI.exe
  • <SYSTEM32>\wins\CDial.dll
  • <SYSTEM32>\spool\web\accadd.htm
  • <SYSTEM32>\wins\NTSVC.exe
  • <SYSTEM32>\wins\CCProxy.ini
  • <SYSTEM32>\wins\web\log.htm
  • <SYSTEM32>\wins\web\list.htm
  • <SYSTEM32>\wins\AccInfo.ini
  • <SYSTEM32>\wins\web\settings.htm
Sets the 'hidden' attribute to the following files:
  • <SYSTEM32>\spool\CDial.dll
  • <SYSTEM32>\wins\svchost.exe
  • <SYSTEM32>\wins\uuid.dll
  • <SYSTEM32>\wins\AccInfo.ini
  • <SYSTEM32>\wins\CDial.dll
  • <SYSTEM32>\spool\uuid.dll
  • <SYSTEM32>\spool\CCProxy.ini
  • <SYSTEM32>\spool\svchost.exe
  • <SYSTEM32>\wins\CCProxy.ini
  • <SYSTEM32>\spool\AccInfo.ini
Deletes the following files:
  • <SYSTEM32>\spool\NTSVC.exe
  • <SYSTEM32>\wins\NAI.exe
  • <SYSTEM32>\wins\NTSVC.exe
  • <SYSTEM32>\wins\delphi.exe
  • <SYSTEM32>\spool\basic.exe
  • <SYSTEM32>\spool\KZ.exe
Network activity:
Connects to:
  • '67.##5.160.76':80
  • '21#.#5.5.121':82
  • 'localhost':1035
UDP:
  • DNS ASK www.ya##o.com
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Shell_TrayWnd' WindowName: ''
  • ClassName: 'C--WINDOWS-system32-spool-svchost.HLP' WindowName: ''
  • ClassName: 'C--WINDOWS-system32-wins-svchost.HLP' WindowName: ''
  • ClassName: 'MS_AutodialMonitor' WindowName: ''
  • ClassName: 'MS_WebcheckMonitor' WindowName: ''
  • ClassName: 'EDIT' 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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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