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Trojan.Encoder.3609

Added to the Dr.Web virus database: 2016-01-28

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'zsevice-455' = '%APPDATA%\vkgnuhe45.exe'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'zsevice-34' = '%APPDATA%\vkgnuhe45.exe'
Creates or modifies the following files:
  • %ALLUSERSPROFILE%\Start Menu\Programs\Startup\help_recover_instructions+qlf.html
  • %ALLUSERSPROFILE%\Start Menu\Programs\Startup\help_recover_instructions+qlf.txt
Malicious functions:
Creates and executes the following:
  • '%APPDATA%\vkgnuhe45.exe'
Executes the following:
  • '<SYSTEM32>\cmd.exe' /c DEL <Full path to virus>
Terminates or attempts to terminate
the following system processes:
  • <SYSTEM32>\cmd.exe
the following user processes:
  • ecmd.exe
Modifies file system:
Creates the following files:
  • C:\Documents and Settings\Default User\Local Settings\History\History.IE5\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Local Settings\History\History.IE5\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Local Settings\History\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Local Settings\Application Data\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Local Settings\Application Data\Microsoft\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Local Settings\Application Data\Microsoft\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Local Settings\Application Data\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Local Settings\History\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Local Settings\Temporary Internet Files\Content.IE5\U98D4X8H\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Local Settings\Temporary Internet Files\Content.IE5\2VAZY7AN\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Local Settings\Temp\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Local Settings\Temp\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Local Settings\Temporary Internet Files\Content.IE5\2VAZY7AN\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Application Data\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Cookies\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Cookies\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Application Data\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Application Data\Microsoft\SystemCertificates\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Application Data\Microsoft\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Application Data\Microsoft\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Favorites\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Local Settings\Application Data\Microsoft\Windows Media\9.0\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Local Settings\Application Data\Microsoft\Windows Media\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Local Settings\Application Data\Microsoft\Windows Media\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Local Settings\Application Data\Microsoft\Windows Media\9.0\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Favorites\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Local Settings\Application Data\Microsoft\Media Player\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Local Settings\Application Data\Microsoft\Media Player\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Local Settings\Temporary Internet Files\Content.IE5\U98D4X8H\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Start Menu\Programs\Accessories\Accessibility\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Start Menu\Programs\Accessories\Entertainment\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Start Menu\Programs\Accessories\Entertainment\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Start Menu\Programs\Accessories\Accessibility\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Recent\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\SendTo\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\SendTo\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Start Menu\Programs\Accessories\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Start Menu\Programs\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Start Menu\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Start Menu\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Start Menu\Programs\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Start Menu\Programs\Accessories\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Start Menu\Programs\Startup\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Start Menu\Programs\Startup\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Local Settings\Temporary Internet Files\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Local Settings\Temporary Internet Files\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Local Settings\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Local Settings\Temporary Internet Files\Content.IE5\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Local Settings\Temporary Internet Files\Content.IE5\YPORKZYZ\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Local Settings\Temporary Internet Files\Content.IE5\YPORKZYZ\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Local Settings\Temporary Internet Files\Content.IE5\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Local Settings\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\PrintHood\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\PrintHood\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Recent\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\NetHood\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\My Documents\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\My Documents\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\NetHood\help_recover_instructions+qlf.txt
  • %ALLUSERSPROFILE%\Documents\My Videos\help_recover_instructions+qlf.html
  • %ALLUSERSPROFILE%\Documents\help_recover_instructions+qlf.txt
  • %ALLUSERSPROFILE%\Documents\help_recover_instructions+qlf.html
  • %ALLUSERSPROFILE%\Documents\My Videos\help_recover_instructions+qlf.txt
  • %ALLUSERSPROFILE%\Documents\My Pictures\Sample Pictures\help_recover_instructions+qlf.html
  • %ALLUSERSPROFILE%\Documents\My Pictures\help_recover_instructions+qlf.txt
  • %ALLUSERSPROFILE%\Documents\My Pictures\help_recover_instructions+qlf.html
  • %ALLUSERSPROFILE%\DRM\help_recover_instructions+qlf.txt
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\Accessibility\help_recover_instructions+qlf.html
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\Communications\help_recover_instructions+qlf.txt
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\Communications\help_recover_instructions+qlf.html
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\Accessibility\help_recover_instructions+qlf.txt
  • %ALLUSERSPROFILE%\DRM\help_recover_instructions+qlf.html
  • %ALLUSERSPROFILE%\Favorites\help_recover_instructions+qlf.txt
  • %ALLUSERSPROFILE%\Favorites\help_recover_instructions+qlf.html
  • %ALLUSERSPROFILE%\Documents\My Music\My Playlists\help_recover_instructions+qlf.txt
  • %ALLUSERSPROFILE%\Documents\My Music\My Playlists\help_recover_instructions+qlf.html
  • %ALLUSERSPROFILE%\Documents\My Music\Sample Music\help_recover_instructions+qlf.txt
  • <Current directory>\help_recover_instructions+qlf.html
  • %APPDATA%\vkgnuhe45.exe
  • %HOMEPATH%\My Documents\recover_file_aixsbjsvn.txt
  • <Current directory>\help_recover_instructions+qlf.txt
  • %ALLUSERSPROFILE%\Documents\My Music\Sample Music\help_recover_instructions+qlf.html
  • %ALLUSERSPROFILE%\Documents\My Music\help_recover_instructions+qlf.txt
  • %ALLUSERSPROFILE%\Documents\My Music\help_recover_instructions+qlf.html
  • %ALLUSERSPROFILE%\Documents\My Pictures\Sample Pictures\help_recover_instructions+qlf.txt
  • %ALLUSERSPROFILE%\Documents\My Music\Sample Playlists\help_recover_instructions+qlf.html
  • %ALLUSERSPROFILE%\Documents\My Music\Sample Playlists\0338E140\help_recover_instructions+qlf.txt
  • %ALLUSERSPROFILE%\Documents\My Music\Sample Playlists\0338E140\help_recover_instructions+qlf.html
  • %ALLUSERSPROFILE%\Documents\My Music\Sample Playlists\help_recover_instructions+qlf.txt
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\Entertainment\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Application Data\Microsoft\Media Player\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Application Data\Microsoft\Media Player\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Application Data\Microsoft\SystemCertificates\My\Certificates\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Application Data\Microsoft\Internet Explorer\help_recover_instructions+qlf.html
  • %ALLUSERSPROFILE%\help_recover_instructions+qlf.txt
  • %ALLUSERSPROFILE%\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Application Data\Microsoft\Internet Explorer\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Application Data\Microsoft\SystemCertificates\My\Certificates\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Application Data\Microsoft\SystemCertificates\My\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Application Data\Microsoft\SystemCertificates\My\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Application Data\Microsoft\SystemCertificates\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Application Data\Microsoft\SystemCertificates\My\CTLs\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Application Data\Microsoft\SystemCertificates\My\CRLs\help_recover_instructions+qlf.txt
  • C:\Documents and Settings\Default User\Application Data\Microsoft\SystemCertificates\My\CRLs\help_recover_instructions+qlf.html
  • C:\Documents and Settings\Default User\Application Data\Microsoft\SystemCertificates\My\CTLs\help_recover_instructions+qlf.txt
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\help_recover_instructions+qlf.html
  • %ALLUSERSPROFILE%\Start Menu\Programs\Administrative Tools\help_recover_instructions+qlf.txt
  • %ALLUSERSPROFILE%\Start Menu\Programs\Administrative Tools\help_recover_instructions+qlf.html
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\help_recover_instructions+qlf.txt
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\Entertainment\help_recover_instructions+qlf.html
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\System Tools\help_recover_instructions+qlf.txt
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\System Tools\help_recover_instructions+qlf.html
  • %ALLUSERSPROFILE%\Start Menu\Programs\Games\help_recover_instructions+qlf.txt
  • %ALLUSERSPROFILE%\Start Menu\help_recover_instructions+qlf.html
  • %ALLUSERSPROFILE%\Templates\help_recover_instructions+qlf.txt
  • %ALLUSERSPROFILE%\Templates\help_recover_instructions+qlf.html
  • %ALLUSERSPROFILE%\Start Menu\help_recover_instructions+qlf.txt
  • %ALLUSERSPROFILE%\Start Menu\Programs\Games\help_recover_instructions+qlf.html
  • %ALLUSERSPROFILE%\Start Menu\Programs\help_recover_instructions+qlf.txt
  • %ALLUSERSPROFILE%\Start Menu\Programs\help_recover_instructions+qlf.html
Deletes itself.
Network activity:
Connects to:
  • 'tr###hung.net':80
  • 'fl#####epublishing.com':80
  • 'bi###arice.net':80
  • 'su####-group.com':80
  • 'ip.#yk.nu':80
  • 'to######heneedyandaid.org':80
  • 'th##at.org':80
TCP:
HTTP GET requests:
  • http://ip.#yk.nu/
HTTP POST requests:
  • http://tr###hung.net/banhang/shop/upload/image/cache/catalog/demo/mssys.php
  • http://fl#####epublishing.com/administrator/components/com_sef/libs/seostats/src/ext/mssys.php
  • http://bi###arice.net/mssys.php
  • http://to######heneedyandaid.org/administrator/components/com_users/views/notes/tmpl/mssys.php
  • http://th##at.org/mssys.php
  • http://su####-group.com/administrator/components/com_admin/views/help/tmpl/mssys.php
UDP:
  • DNS ASK tr###hung.net
  • DNS ASK fl#####epublishing.com
  • DNS ASK bi###arice.net
  • DNS ASK su####-group.com
  • DNS ASK ip.#yk.nu
  • DNS ASK to######heneedyandaid.org
  • DNS ASK th##at.org
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' 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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After booting up, run a full scan of all disk partitions with Dr.Web Anti-virus for Linux.

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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.

Find out more about Dr.Web for Android