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Trojan.Encoder.31764

Added to the Dr.Web virus database: 2020-05-08

Virus description added:

Technical Information

To ensure autorun and distribution
Creates the following files on removable media
  • <Drive name for removable media>:\1sm_price.xls
  • <Drive name for removable media>:\10thingscondoms.pdf
  • <Drive name for removable media>:\samieee_obiee_presentation.pptx
Malicious functions
Terminates or attempts to terminate
the following system processes:
  • %WINDIR%\servicing\trustedinstaller.exe
Reads files which store third party applications passwords
  • %HOMEPATH%\desktop\browse.htm
  • %HOMEPATH%\desktop\tileimage.bmp
  • %HOMEPATH%\desktop\tree_view.htm
  • %HOMEPATH%\desktop\trivial-merge.htm
  • %HOMEPATH%\desktop\thlps_keeper_mayer_1965.docx
  • %HOMEPATH%\desktop\testcertificate.cer
  • %HOMEPATH%\desktop\split.avi
  • %HOMEPATH%\desktop\sdszfo.docx
  • %HOMEPATH%\desktop\pmd.cer
  • %HOMEPATH%\desktop\ovp25012015.doc
  • %HOMEPATH%\desktop\garden.htm
  • %HOMEPATH%\desktop\fi51.doc
  • %HOMEPATH%\desktop\dialmap.bmp
  • %HOMEPATH%\desktop\dashborder_144.bmp
  • %HOMEPATH%\desktop\contoso_1.cer
  • %HOMEPATH%\desktop\contoso.cer
  • %HOMEPATH%\desktop\about.htm
  • %LOCALAPPDATA%\google\chrome\user data\default\cookies
Modifies file system
Creates the following files
  • C:\totalcmd\de5aad-readme.txt
  • %LOCALAPPDATA%\google\chrome\user data\de5aad-readme.txt
  • %ProgramFiles(x86)%\winamp\system\de5aad-readme.txt
  • %HOMEPATH%\de5aad-readme.txt
  • %PROGRAMDATA%\microsoft\user account pictures\de5aad-readme.txt
  • %ProgramFiles(x86)%\mirc\de5aad-readme.txt
  • %ProgramFiles(x86)%\winamp\de5aad-readme.txt
  • %ProgramFiles(x86)%\opera\29.0.1795.47\de5aad-readme.txt
  • %HOMEPATH%\favorites\msn websites\de5aad-readme.txt
  • %HOMEPATH%\favorites\windows live\de5aad-readme.txt
  • C:\users\public\recorded tv\sample media\de5aad-readme.txt
  • C:\users\public\videos\sample videos\de5aad-readme.txt
  • C:\users\public\pictures\sample pictures\de5aad-readme.txt
  • %ProgramFiles(x86)%\k-lite codec pack\icaros\resources\de5aad-readme.txt
  • %ProgramFiles(x86)%\google\chrome\application\de5aad-readme.txt
  • %LOCALAPPDATA%\google\chrome\user data\default\cache\de5aad-readme.txt
  • %ProgramFiles(x86)%\microsoft office\office14\1033\de5aad-readme.txt
  • %ProgramFiles(x86)%\adobe\acrobat reader dc\reader\de5aad-readme.txt
  • %HOMEPATH%\favorites\links\de5aad-readme.txt
  • C:\users\public\libraries\de5aad-readme.txt
  • %ProgramFiles(x86)%\mirc\defaults\de5aad-readme.txt
  • C:\recovery\1195d5a8-f371-11e4-9c00-dd3082671db2\de5aad-readme.txt
  • %ProgramFiles(x86)%\msbuild\de5aad-readme.txt
  • C:\far2\de5aad-readme.txt
  • %ProgramFiles(x86)%\k-lite codec pack\icaros\de5aad-readme.txt
  • %HOMEPATH%\contacts\de5aad-readme.txt
  • %ProgramFiles(x86)%\adobe\acrobat reader dc\de5aad-readme.txt
  • %ProgramFiles(x86)%\microsoft office\office10\de5aad-readme.txt
  • D:\de5aad-readme.txt
  • %HOMEPATH%\desktop\de5aad-readme.txt
  • %ProgramFiles(x86)%\qip 2012\de5aad-readme.txt
  • %ProgramFiles(x86)%\k-lite codec pack\de5aad-readme.txt
  • %LOCALAPPDATA%\google\chrome\user data\default\de5aad-readme.txt
Moves the following files
  • from %ProgramFiles(x86)%\qip 2012\unins000.msg to %ProgramFiles(x86)%\qip 2012\unins000.msg.de5aad
  • from %ProgramFiles(x86)%\winamp\system\wasabi2.w5s to %ProgramFiles(x86)%\winamp\system\wasabi2.w5s.de5aad
  • from %ProgramFiles(x86)%\adobe\acrobat reader dc\reader\cryptocme.sig to %ProgramFiles(x86)%\adobe\acrobat reader dc\reader\cryptocme.sig.de5aad
  • from %ProgramFiles(x86)%\k-lite codec pack\filters\ffdshow\ffdshow.ax to %ProgramFiles(x86)%\k-lite codec pack\filters\ffdshow\ffdshow.ax.de5aad
  • from %ProgramFiles(x86)%\google\chrome\application\42.0.2311.135\natives_blob.bin to %ProgramFiles(x86)%\google\chrome\application\42.0.2311.135\natives_blob.bin.de5aad
  • from %APPDATA%\mirc\mirc.ini to %APPDATA%\mirc\mirc.ini.de5aad
  • from %ProgramFiles(x86)%\winamp\system\vp8.wbm to %ProgramFiles(x86)%\winamp\system\vp8.wbm.de5aad
  • from %ProgramFiles(x86)%\mirc\mirc.chm to %ProgramFiles(x86)%\mirc\mirc.chm.de5aad
  • from %ProgramFiles(x86)%\winamp\install.ini to %ProgramFiles(x86)%\winamp\install.ini.de5aad
  • from %ProgramFiles(x86)%\mirc\versions.txt to %ProgramFiles(x86)%\mirc\versions.txt.de5aad
  • from %ProgramFiles(x86)%\winamp\whatsnew.txt to %ProgramFiles(x86)%\winamp\whatsnew.txt.de5aad
  • from %ProgramFiles(x86)%\mirc\defaults\servers.ini to %ProgramFiles(x86)%\mirc\defaults\servers.ini.de5aad
  • from %ProgramFiles(x86)%\winamp\components\ssdp.w6c to %ProgramFiles(x86)%\winamp\components\ssdp.w6c.de5aad
  • from %ProgramFiles(x86)%\k-lite codec pack\icaros\resources\icarosdescriptions.propdesc to %ProgramFiles(x86)%\k-lite codec pack\icaros\resources\icarosdescriptions.propdesc.de5aad
  • from %ProgramFiles(x86)%\google\chrome\application\debug.log to %ProgramFiles(x86)%\google\chrome\application\debug.log.de5aad
  • from %ProgramFiles(x86)%\qip 2012\smilies\qip smilies\aa.gif to %ProgramFiles(x86)%\qip 2012\smilies\qip smilies\aa.gif.de5aad
  • from %ProgramFiles(x86)%\opera\29.0.1795.47\opera_autoupdate.licenses to %ProgramFiles(x86)%\opera\29.0.1795.47\opera_autoupdate.licenses.de5aad
  • from %ProgramFiles(x86)%\adobe\acrobat reader dc\reader\rtc.der to %ProgramFiles(x86)%\adobe\acrobat reader dc\reader\rtc.der.de5aad
  • from %ProgramFiles(x86)%\microsoft office\office14\1033\vbaows10.chm to %ProgramFiles(x86)%\microsoft office\office14\1033\vbaows10.chm.de5aad
  • from %ProgramFiles(x86)%\microsoft office\office10\thdic.lex to %ProgramFiles(x86)%\microsoft office\office10\thdic.lex.de5aad
  • from %ProgramFiles(x86)%\k-lite codec pack\unins000.dat to %ProgramFiles(x86)%\k-lite codec pack\unins000.dat.de5aad
  • from %ProgramFiles(x86)%\adobe\acrobat reader dc\reader\agmgpuoptin.ini to %ProgramFiles(x86)%\adobe\acrobat reader dc\reader\agmgpuoptin.ini.de5aad
  • from %ProgramFiles(x86)%\adobe\acrobat reader dc\reader\adobe.reader.dependencies.manifest to %ProgramFiles(x86)%\adobe\acrobat reader dc\reader\adobe.reader.dependencies.manifest.de5aad
  • from %ProgramFiles(x86)%\mirc\defaults\mirc.ini to %ProgramFiles(x86)%\mirc\defaults\mirc.ini.de5aad
  • from %ProgramFiles(x86)%\msbuild\microsoft.office.infopath.targets to %ProgramFiles(x86)%\msbuild\microsoft.office.infopath.targets.de5aad
  • from %ProgramFiles(x86)%\k-lite codec pack\icaros\icaros license.txt to %ProgramFiles(x86)%\k-lite codec pack\icaros\icaros license.txt.de5aad
  • from %ProgramFiles(x86)%\k-lite codec pack\icaros\ffmpeg license.txt to %ProgramFiles(x86)%\k-lite codec pack\icaros\ffmpeg license.txt.de5aad
  • from %ProgramFiles(x86)%\adobe\acrobat reader dc\readme.htm to %ProgramFiles(x86)%\adobe\acrobat reader dc\readme.htm.de5aad
  • from %ProgramFiles(x86)%\microsoft office\office10\trigram.lex to %ProgramFiles(x86)%\microsoft office\office10\trigram.lex.de5aad
  • from %ProgramFiles(x86)%\qip 2012\unins000.dat to %ProgramFiles(x86)%\qip 2012\unins000.dat.de5aad
  • from %ProgramFiles(x86)%\winamp\system\xml.w5s to %ProgramFiles(x86)%\winamp\system\xml.w5s.de5aad
  • from %ProgramFiles(x86)%\winamp\system\xspf.w5s to %ProgramFiles(x86)%\winamp\system\xspf.w5s.de5aad
Modifies user data files (Trojan.Encoder).
Changes user data files extensions (Trojan.Encoder).

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