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Trojan.Encoder.8430

Added to the Dr.Web virus database: 2016-12-29

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe HelpMe.exe'
Creates or modifies the following files:
  • %ALLUSERSPROFILE%\Start Menu\Programs\Startup\desktop.ini.exe
  • %HOMEPATH%\Start Menu\Programs\Startup\Soft.lnk
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
  • hidden files
Executes the following:
  • '<SYSTEM32>\HelpMe.exe'
Searches for windows to
detect analytical utilities:
  • ClassName: '', WindowName: 'Process Monitor - Sysinternals: www.sysinternals.com'
  • ClassName: 'PROCMON_WINDOW_CLASS', WindowName: ''
  • ClassName: '', WindowName: 'Registry Monitor - Sysinternals: www.sysinternals.com'
  • ClassName: 'RegmonClass', WindowName: ''
  • ClassName: '', WindowName: 'File Monitor - Sysinternals: www.sysinternals.com'
  • ClassName: 'GBDYLLO', WindowName: ''
  • ClassName: 'OLLYDBG', WindowName: ''
  • ClassName: 'FilemonClass', WindowName: ''
  • ClassName: 'pediy06', WindowName: ''
Modifies file system:
Creates the following files:
  • %ALLUSERSPROFILE%\Start Menu\Programs\Windows Messenger.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\MSN.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Windows Movie Maker.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Windows Catalog.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Set Program Access and Defaults.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Games\Spider Solitaire.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Games\Internet Spades.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Games\Internet Reversi.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Games\Minesweeper.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Games\Solitaire.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Games\Pinball.lnk.exe
  • C:\Documents and Settings\Default User\Local Settings\Application Data\Microsoft\Windows Media\9.0\WMSDKNS.XML.exe
  • C:\Documents and Settings\Default User\Local Settings\Application Data\Microsoft\Windows Media\9.0\WMSDKNS.DTD.exe
  • C:\Documents and Settings\Default User\Local Settings\desktop.ini.exe
  • C:\Documents and Settings\Default User\Local Settings\History\History.IE5\desktop.ini.exe
  • C:\Documents and Settings\Default User\Local Settings\History\desktop.ini.exe
  • C:\Documents and Settings\Default User\Local Settings\Application Data\Microsoft\Media Player\CurrentDatabase_59R.wmdb.exe
  • C:\Documents and Settings\Default User\Application Data\desktop.ini.exe
  • %ALLUSERSPROFILE%\Start Menu\Windows Update.lnk.exe
  • C:\Documents and Settings\Default User\Application Data\Microsoft\Internet Explorer\brndlog.bak.exe
  • C:\Documents and Settings\Default User\Cookies\index.dat.exe
  • C:\Documents and Settings\Default User\Application Data\Microsoft\Internet Explorer\brndlog.txt.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Games\Internet Hearts.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Administrative Tools\Computer Management.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Administrative Tools\Component Services.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Administrative Tools\Data Sources (ODBC).lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Administrative Tools\Event Viewer.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Administrative Tools\desktop.ini.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\WordPad.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\System Tools\Scheduled Tasks.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\System Tools\Files and Settings Transfer Wizard.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\System Tools\Security Center.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\System Tools\System Restore.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\System Tools\System Information.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Games\Freecell.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Games\desktop.ini.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Games\Hearts.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Games\Internet Checkers.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Games\Internet Backgammon.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\desktop.ini.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Administrative Tools\Microsoft .NET Framework 1.1 Configuration.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Administrative Tools\Local Security Policy.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Administrative Tools\Microsoft .NET Framework 1.1 Wizards.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Administrative Tools\Services.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Administrative Tools\Performance.lnk.exe
  • C:\Documents and Settings\Default User\Start Menu\Programs\Remote Assistance.lnk.exe
  • C:\Documents and Settings\Default User\Start Menu\Programs\desktop.ini.exe
  • C:\Documents and Settings\Default User\Start Menu\Programs\Startup\desktop.ini.exe
  • C:\Documents and Settings\Default User\Templates\amipro.sam.exe
  • C:\Documents and Settings\Default User\Start Menu\Programs\Windows Media Player.lnk.exe
  • C:\Documents and Settings\Default User\Start Menu\Programs\Accessories\Windows Explorer.lnk.exe
  • C:\Documents and Settings\Default User\Start Menu\Programs\Accessories\Notepad.lnk.exe
  • C:\Documents and Settings\Default User\Start Menu\Programs\Accessories\Entertainment\Windows Media Player.lnk.exe
  • C:\Documents and Settings\Default User\Start Menu\Programs\Accessories\Program Compatibility Wizard.lnk.exe
  • C:\Documents and Settings\Default User\Start Menu\Programs\Accessories\Tour Windows XP.lnk.exe
  • C:\Documents and Settings\Default User\Start Menu\Programs\Accessories\Synchronize.lnk.exe
  • C:\Documents and Settings\Default User\Templates\wordpfct.wpd.exe
  • C:\Documents and Settings\Default User\Templates\sndrec.wav.exe
  • C:\Documents and Settings\Default User\Templates\wordpfct.wpg.exe
  • C:\Documents and Settings\LocalService\Local Settings\Application Data\FontCache3.0.0.0.dat.exe
  • C:\Documents and Settings\LocalService\Cookies\index.dat.exe
  • C:\Documents and Settings\Default User\Templates\quattro.wb2.exe
  • C:\Documents and Settings\Default User\Templates\excel4.xls.exe
  • C:\Documents and Settings\Default User\Templates\excel.xls.exe
  • C:\Documents and Settings\Default User\Templates\lotus.wk4.exe
  • C:\Documents and Settings\Default User\Templates\presenta.shw.exe
  • C:\Documents and Settings\Default User\Templates\powerpnt.ppt.exe
  • C:\Documents and Settings\Default User\Start Menu\Programs\Accessories\Entertainment\desktop.ini.exe
  • C:\Documents and Settings\Default User\Local Settings\<INETFILES>\desktop.ini.exe
  • C:\Documents and Settings\Default User\Local Settings\<INETFILES>\Content.IE5\YPORKZYZ\desktop.ini.exe
  • C:\Documents and Settings\Default User\NTUSER.DAT.exe
  • C:\System Volume Information\_restore{E7F0F64C-F7E5-4319-8757-E9A20C1C4E14}\_filelst.cfg
  • C:\Documents and Settings\Default User\SendTo\Compressed (zipped) Folder.ZFSendToTarget.exe
  • C:\Documents and Settings\Default User\Local Settings\<INETFILES>\Content.IE5\U98D4X8H\desktop.ini.exe
  • C:\Documents and Settings\Default User\Local Settings\<INETFILES>\Content.IE5\2VAZY7AN\desktop.ini.exe
  • C:\Documents and Settings\Default User\Local Settings\History\History.IE5\index.dat.exe
  • C:\Documents and Settings\Default User\Local Settings\<INETFILES>\Content.IE5\desktop.ini.exe
  • C:\Documents and Settings\Default User\Local Settings\<INETFILES>\Content.IE5\KHMHGZ4F\desktop.ini.exe
  • C:\Documents and Settings\Default User\Local Settings\<INETFILES>\Content.IE5\index.dat.exe
  • C:\Documents and Settings\Default User\Start Menu\Programs\Accessories\Accessibility\On-Screen Keyboard.lnk.exe
  • C:\Documents and Settings\Default User\Start Menu\Programs\Accessories\Accessibility\Narrator.lnk.exe
  • C:\Documents and Settings\Default User\Start Menu\Programs\Accessories\Accessibility\Utility Manager.lnk.exe
  • C:\Documents and Settings\Default User\Start Menu\Programs\Accessories\desktop.ini.exe
  • C:\Documents and Settings\Default User\Start Menu\Programs\Accessories\Command Prompt.lnk.exe
  • C:\Documents and Settings\Default User\Start Menu\Programs\Accessories\Accessibility\Magnifier.lnk.exe
  • C:\Documents and Settings\Default User\SendTo\desktop.ini.exe
  • C:\Documents and Settings\Default User\SendTo\Desktop (create shortcut).DeskLink.exe
  • C:\Documents and Settings\Default User\SendTo\Mail Recipient.MAPIMail.exe
  • C:\Documents and Settings\Default User\Start Menu\Programs\Accessories\Accessibility\desktop.ini.exe
  • C:\Documents and Settings\Default User\Start Menu\desktop.ini.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\horses.bmp.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\guitar.bmp.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\kick.bmp.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\palm tree.bmp.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\lift-off.bmp.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\frog.bmp.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\dog.bmp.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\dirt bike.bmp.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\drip.bmp.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\fish.bmp.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\duck.bmp.exe
  • %ALLUSERSPROFILE%\Documents\My Music\Desktop.ini.exe
  • %ALLUSERSPROFILE%\Documents\desktop.ini.exe
  • %ALLUSERSPROFILE%\Documents\My Music\Sample Music\Beethoven's Symphony No. 9 (Scherzo).wma.exe
  • %ALLUSERSPROFILE%\Documents\My Music\Sample Music\New Stories (Highway Blues).wma.exe
  • %ALLUSERSPROFILE%\Documents\My Music\Sample Music\desktop.ini.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\%USERNAME%.bmp.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\red flower.bmp.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\pink flower.bmp.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\skater.bmp.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\guest.bmp.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\snowflake.bmp.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\chess.bmp.exe
  • C:\DbgLog.log.exe
  • C:\CONFIG.SYS.exe
  • %ALLUSERSPROFILE%\Application Data\desktop.ini.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\Dr Watson\drwtsn32.log.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\Crypto\RSA\S-1-5-18\d42cc0c3858a58db2db37658219e6400_23ef5514-3059-436f-a4a7-4cefaab20eb1.exe
  • C:\boot.ini.exe
  • C:\AutoRun.exe
  • <SYSTEM32>\HelpMe.exe
  • C:\AUTORUN.INF
  • C:\AUTORUN.INF.exe
  • C:\AUTOEXEC.BAT.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\beach.bmp.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\ball.bmp.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\butterfly.bmp.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\cat.bmp.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\car.bmp.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\astronaut.bmp.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\Media Player\UserMigratedStore_59R.bin.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\Media Player\DefaultStore_59R.bin.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\Network\Connections\Pbk\rasphone.pbk.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\airplane.bmp.exe
  • %ALLUSERSPROFILE%\Application Data\Microsoft\Network\Connections\Pbk\sharedaccess.ini.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\Communications\Network Connections.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\Communications\HyperTerminal.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\Communications\Network Setup Wizard.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\Communications\Remote Desktop Connection.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\Communications\New Connection Wizard.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\Communications\desktop.ini.exe
  • %ALLUSERSPROFILE%\Start Menu\desktop.ini.exe
  • %ALLUSERSPROFILE%\DRM\drmv2.sst.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\Accessibility\Accessibility Wizard.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\Calculator.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\Accessibility\desktop.ini.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\System Tools\Character Map.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\System Tools\Backup.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\System Tools\desktop.ini.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\System Tools\Disk Defragmenter.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\System Tools\Disk Cleanup.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\Paint.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\desktop.ini.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\Communications\Wireless Network Setup Wizard.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\Entertainment\desktop.ini.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\Entertainment\Volume Control.lnk.exe
  • %ALLUSERSPROFILE%\Start Menu\Programs\Accessories\Entertainment\Sound Recorder.lnk.exe
  • %ALLUSERSPROFILE%\DRM\drmv2.lic.exe
  • %ALLUSERSPROFILE%\Documents\My Music\Sample Playlists\0338E140\Plylst2.wpl.exe
  • %ALLUSERSPROFILE%\Documents\My Music\Sample Playlists\0338E140\Plylst15.wpl.exe
  • %ALLUSERSPROFILE%\Documents\My Music\Sample Playlists\0338E140\Plylst3.wpl.exe
  • %ALLUSERSPROFILE%\Documents\My Music\Sample Playlists\0338E140\Plylst5.wpl.exe
  • %ALLUSERSPROFILE%\Documents\My Music\Sample Playlists\0338E140\Plylst4.wpl.exe
  • %ALLUSERSPROFILE%\Documents\My Music\Sample Playlists\0338E140\Plylst14.wpl.exe
  • %ALLUSERSPROFILE%\Documents\My Music\Sample Playlists\0338E140\Plylst10.wpl.exe
  • %ALLUSERSPROFILE%\Documents\My Music\Sample Playlists\0338E140\Plylst1.wpl.exe
  • %ALLUSERSPROFILE%\Documents\My Music\Sample Playlists\0338E140\Plylst11.wpl.exe
  • %ALLUSERSPROFILE%\Documents\My Music\Sample Playlists\0338E140\Plylst13.wpl.exe
  • %ALLUSERSPROFILE%\Documents\My Music\Sample Playlists\0338E140\Plylst12.wpl.exe
  • %ALLUSERSPROFILE%\Documents\My Pictures\Sample Pictures\Sunset.jpg.exe
  • %ALLUSERSPROFILE%\Documents\My Pictures\Sample Pictures\desktop.ini.exe
  • %ALLUSERSPROFILE%\Documents\My Pictures\Sample Pictures\Water lilies.jpg.exe
  • %ALLUSERSPROFILE%\Documents\My Videos\Desktop.ini.exe
  • %ALLUSERSPROFILE%\Documents\My Pictures\Sample Pictures\Winter.jpg.exe
  • %ALLUSERSPROFILE%\Documents\My Pictures\Sample Pictures\Blue hills.jpg.exe
  • %ALLUSERSPROFILE%\Documents\My Music\Sample Playlists\0338E140\Plylst7.wpl.exe
  • %ALLUSERSPROFILE%\Documents\My Music\Sample Playlists\0338E140\Plylst6.wpl.exe
  • %ALLUSERSPROFILE%\Documents\My Music\Sample Playlists\0338E140\Plylst8.wpl.exe
  • %ALLUSERSPROFILE%\Documents\My Pictures\Desktop.ini.exe
  • %ALLUSERSPROFILE%\Documents\My Music\Sample Playlists\0338E140\Plylst9.wpl.exe
Sets the 'hidden' attribute to the following files:
  • C:\AUTORUN.INF
  • C:\AutoRun.exe
Deletes the following files:
  • C:\AUTORUN.INF
Modifies user data files (Trojan.Encoder).
Changes user data files extensions (Trojan.Encoder).
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Shell_TrayWnd' WindowName: ''
  • ClassName: '18467-41' 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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  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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