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Profil

Trojan.Encoder.31898

Added to the Dr.Web virus database: 2020-05-24

Virus description added:

Technical Information

To ensure autorun and distribution
Creates the following files on removable media
  • <Drive name for removable media>:\roozenedowebinar.pptx
  • <Drive name for removable media>:\ksearch_esa_talk.ppt
  • <Drive name for removable media>:\indogerman2010.pptx
  • <Drive name for removable media>:\middaugh_keynote.pptx
  • <Drive name for removable media>:\waterresourcesag.pptx
  • <Drive name for removable media>:\file1.ppt
  • <Drive name for removable media>:\asaprojectcompetition.pptx
  • <Drive name for removable media>:\2.jpeg
  • <Drive name for removable media>:\stoc13_ml_quoc_le.pptx
Malicious functions
To complicate detection of its presence in the operating system,
deletes volume shadow copies.
Reads files which store third party applications passwords
  • %HOMEPATH%\desktop\contosoroot_1.cer
  • %HOMEPATH%\desktop\fi51.doc
  • %HOMEPATH%\desktop\hadac_newsletter_july_2010_final.docx
  • %HOMEPATH%\desktop\weeklysheet1215.doc
  • %HOMEPATH%\desktop\thlps_keeper_mayer_1965.docx
  • %HOMEPATH%\desktop\testee.cer
  • %HOMEPATH%\desktop\sdksampleprivdeveloper.cer
  • %HOMEPATH%\desktop\sdkfailsafeemulator.cer
  • %HOMEPATH%\desktop\hanni_umami_chapter.doc
  • %HOMEPATH%\desktop\dashborder_96.bmp
Modifies file system
Creates the following files
  • C:\far2\c22197-readme.txt
  • C:\far2\documentation\rus\c22197-readme.txt
  • %HOMEPATH%\c22197-readme.txt
  • C:\far2\addons\c22197-readme.txt
  • C:\far2\plugins\drawline\c22197-readme.txt
  • %ProgramFiles%\microsoft office\office14\library\analysis\c22197-readme.txt
  • %ProgramFiles%\microsoft office\document themes 14\c22197-readme.txt
  • %PROGRAMDATA%\microsoft\mf\c22197-readme.txt
  • C:\users\public\pictures\sample pictures\c22197-readme.txt
  • %ProgramFiles(x86)%\adobe\acrobat reader dc\c22197-readme.txt
  • %ProgramFiles(x86)%\adobe\acrobat reader dc\reader\c22197-readme.txt
  • C:\far2\encyclopedia\tap\c22197-readme.txt
  • %ProgramFiles%\microsoft office\templates\1033\c22197-readme.txt
  • %HOMEPATH%\favorites\windows live\c22197-readme.txt
  • C:\far2\documentation\eng\c22197-readme.txt
  • C:\far2\fexcept\c22197-readme.txt
  • C:\far2\plugins\align\c22197-readme.txt
  • C:\far2\pluginsdk\headers.c\c22197-readme.txt
  • C:\users\all users\c22197-readme.txt
  • C:\users\all users\ntuser.pol
  • %PROGRAMDATA%\microsoft\user account pictures\c22197-readme.txt
  • %LOCALAPPDATA%\applicationhistory\c22197-readme.txt
  • %HOMEPATH%\desktop\c22197-readme.txt
  • C:\users\public\music\sample music\c22197-readme.txt
  • %ProgramFiles%\microsoft office\stationery\1033\c22197-readme.txt
  • C:\totalcmd\c22197-readme.txt
  • C:\users\public\videos\sample videos\c22197-readme.txt
  • %HOMEPATH%\contacts\c22197-readme.txt
  • C:\recovery\1195d5a8-f371-11e4-9c00-dd3082671db2\c22197-readme.txt
  • C:\users\public\recorded tv\sample media\c22197-readme.txt
  • %HOMEPATH%\favorites\links\c22197-readme.txt
  • D:\c22197-readme.txt
  • C:\users\all users\microsoft help\hx_1033_mkwd_k.hxw
  • C:\users\all users\microsoft help\hx_1033_mkwd_namedurl.hxw
Sets the 'hidden' attribute to the following files
  • C:\users\all users\microsoft help\hx_1033_mkwd_k.hxw.c22197
  • C:\users\all users\microsoft help\hx_1033_mkwd_namedurl.hxw.c22197
Moves the following files
  • from %ProgramFiles(x86)%\adobe\acrobat reader dc\reader\cryptocme.sig to %ProgramFiles(x86)%\adobe\acrobat reader dc\reader\cryptocme.sig.c22197
  • from C:\users\all users\ntuser.pol to C:\users\all users\ntuser.pol.c22197
  • from %ProgramFiles%\microsoft office\templates\1033\adjacencymergeletter.dotx to %ProgramFiles%\microsoft office\templates\1033\adjacencymergeletter.dotx.c22197
  • from %ProgramFiles%\microsoft office\office14\library\analysis\analys32.xll to %ProgramFiles%\microsoft office\office14\library\analysis\analys32.xll.c22197
  • from %ProgramFiles%\microsoft office\document themes 14\adjacency.thmx to %ProgramFiles%\microsoft office\document themes 14\adjacency.thmx.c22197
  • from %ProgramFiles%\microsoft office\stationery\1033\currency.gif to %ProgramFiles%\microsoft office\stationery\1033\currency.gif.c22197
  • from %ProgramFiles(x86)%\k-lite codec pack\icaros\icaros license.txt to %ProgramFiles(x86)%\k-lite codec pack\icaros\icaros license.txt.c22197
  • from %ProgramFiles(x86)%\k-lite codec pack\icaros\ffmpeg license.txt to %ProgramFiles(x86)%\k-lite codec pack\icaros\ffmpeg license.txt.c22197
  • from %APPDATA%\telegram desktop\unins000.dat to %APPDATA%\telegram desktop\unins000.dat.c22197
  • from %APPDATA%\telegram desktop\log.txt to %APPDATA%\telegram desktop\log.txt.c22197
  • from %ProgramFiles(x86)%\adobe\acrobat reader dc\resource\font\adobepistd.otf to %ProgramFiles(x86)%\adobe\acrobat reader dc\resource\font\adobepistd.otf.c22197
  • from C:\users\all users\microsoft help\hx_1033_mkwd_k.hxw to C:\users\all users\microsoft help\hx_1033_mkwd_k.hxw.c22197
  • from C:\users\all users\microsoft help\hx_1033_mkwd_namedurl.hxw to C:\users\all users\microsoft help\hx_1033_mkwd_namedurl.hxw.c22197
Modifies user data files (Trojan.Encoder).
Changes user data files extensions (Trojan.Encoder).
Miscellaneous
Creates and executes the following
  • '<SYSTEM32>\vssadmin.exe' delete shadows /all /quiet' (with hidden window)

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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