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Trojan.Encoder.33733

Added to the Dr.Web virus database: 2021-03-31

Virus description added:

Technical Information

To ensure autorun and distribution
Modifies the following registry keys
  • [<HKCU>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '1' = '"<Full path to file>"'
Creates the following files on removable media
  • <Drive name for removable media>:\correct.avi
  • <Drive name for removable media>:\000814251_video_01.avi
  • <Drive name for removable media>:\dashborder_192.bmp
  • <Drive name for removable media>:\dial.bmp
  • <Drive name for removable media>:\coffee.bmp
  • <Drive name for removable media>:\dashborder_120.bmp
  • <Drive name for removable media>:\contosoroot.cer
  • <Drive name for removable media>:\contoso.cer
  • <Drive name for removable media>:\sdksampleprivdeveloper.cer
  • <Drive name for removable media>:\contoso_1.cer
  • <Drive name for removable media>:\hanni_umami_chapter.doc
Malicious functions
To complicate detection of its presence in the operating system,
deletes volume shadow copies.
Terminates or attempts to terminate
the following system processes:
  • <SYSTEM32>\dwm.exe
  • <SYSTEM32>\taskhost.exe
Modifies file system
Creates the following files
  • C:\readme-warning.txt
  • %HOMEPATH%\desktop\readme-warning.txt
  • D:\readme-warning.txt
Modifies the following files
  • D:\install.log
  • <Drive name for removable media>:\correct.avi
  • <Drive name for removable media>:\000814251_video_01.avi
  • <Drive name for removable media>:\dashborder_192.bmp
  • <Drive name for removable media>:\dial.bmp
  • <Drive name for removable media>:\coffee.bmp
  • <Drive name for removable media>:\dashborder_120.bmp
  • <Drive name for removable media>:\contosoroot.cer
  • <Drive name for removable media>:\contoso.cer
  • <Drive name for removable media>:\sdksampleprivdeveloper.cer
  • <Drive name for removable media>:\contoso_1.cer
  • <Drive name for removable media>:\hanni_umami_chapter.doc
  • <Drive name for removable media>:\uep_form_786_bulletin_1726i602.doc
Creates ransom message files (Trojan.Encoder).
Modifies user data files (Trojan.Encoder).
Changes user data files extensions (Trojan.Encoder).
Miscellaneous
Creates and executes the following
  • '<SYSTEM32>\cmd.exe' ' (with hidden window)
Executes the following
  • '<SYSTEM32>\cmd.exe'
  • '<SYSTEM32>\sc.exe' delete "SQLAgent$OPTIMA"
  • '<SYSTEM32>\sc.exe' delete "ReportServer$OPTIMA"
  • '<SYSTEM32>\sc.exe' delete "msftesql$SQLEXPRESS"
  • '<SYSTEM32>\sc.exe' delete "postgresql-x64-9.4"
  • '<SYSTEM32>\sc.exe' delete WRSVC
  • '<SYSTEM32>\sc.exe' delete ekrn
  • '<SYSTEM32>\sc.exe' delete klim6
  • '<SYSTEM32>\sc.exe' delete "AVP18.0.0"
  • '<SYSTEM32>\sc.exe' delete KLIF
  • '<SYSTEM32>\sc.exe' delete klpd
  • '<SYSTEM32>\sc.exe' delete klflt
  • '<SYSTEM32>\sc.exe' delete klbackupdisk
  • '<SYSTEM32>\sc.exe' delete klbackupflt
  • '<SYSTEM32>\sc.exe' delete klmouflt
  • '<SYSTEM32>\sc.exe' delete ntrtscan
  • '<SYSTEM32>\sc.exe' delete klhk
  • '<SYSTEM32>\sc.exe' delete "KSDE1.0.0"
  • '<SYSTEM32>\sc.exe' delete kltap
  • '<SYSTEM32>\sc.exe' delete TmFilter
  • '<SYSTEM32>\sc.exe' delete TMLWCSService
  • '<SYSTEM32>\sc.exe' delete tmusa
  • '<SYSTEM32>\sc.exe' delete TmPreFilter
  • '<SYSTEM32>\sc.exe' delete TMSmartRelayService
  • '<SYSTEM32>\sc.exe' delete TMiCRCScanService
  • '<SYSTEM32>\sc.exe' delete VSApiNt
  • '<SYSTEM32>\sc.exe' delete TmCCSF
  • '<SYSTEM32>\sc.exe' delete tmlisten
  • '<SYSTEM32>\sc.exe' delete TmProxy
  • '<SYSTEM32>\sc.exe' delete "MSSQL$OPTIMA"
  • '<SYSTEM32>\sc.exe' delete klkbdflt
  • '<SYSTEM32>\sc.exe' delete "MSSQLFDLauncher$OPTIMA"
  • '<SYSTEM32>\sc.exe' delete MsDtsServer130
  • '<SYSTEM32>\sc.exe' delete vmickvpexchange
  • '<SYSTEM32>\sc.exe' delete vmicguestinterface
  • '<SYSTEM32>\sc.exe' delete vmicshutdown
  • '<SYSTEM32>\sc.exe' delete vmicheartbeat
  • '<SYSTEM32>\sc.exe' delete vmicrdv
  • '<SYSTEM32>\sc.exe' delete storflt
  • '<SYSTEM32>\sc.exe' delete vmictimesync
  • '<SYSTEM32>\sc.exe' delete vmicvss
  • '<SYSTEM32>\sc.exe' delete MSSQLFDLauncher
  • '<SYSTEM32>\sc.exe' delete MSSQLSERVER
  • '<SYSTEM32>\sc.exe' delete SQLSERVERAGENT
  • '<SYSTEM32>\sc.exe' delete SQLBrowser
  • '<SYSTEM32>\sc.exe' delete SQLTELEMETRY
  • '<SYSTEM32>\sc.exe' delete SSISTELEMETRY130
  • '<SYSTEM32>\sc.exe' delete "SQLAgent$PROGID"
  • '<SYSTEM32>\sc.exe' delete SQLWriter
  • '<SYSTEM32>\sc.exe' delete "MSSQL$VEEAMSQL2012"
  • '<SYSTEM32>\sc.exe' delete "SQLAgent$VEEAMSQL2012"
  • '<SYSTEM32>\sc.exe' delete MSSQL
  • '<SYSTEM32>\sc.exe' delete SQLAgent
  • '<SYSTEM32>\sc.exe' delete MSSQLServerADHelper100
  • '<SYSTEM32>\sc.exe' delete MSSQLServerOLAPService
  • '<SYSTEM32>\sc.exe' delete MsDtsServer100
  • '<SYSTEM32>\sc.exe' delete ReportServer
  • '<SYSTEM32>\sc.exe' delete "SQLTELEMETRY$HL"
  • '<SYSTEM32>\sc.exe' delete TMBMServer
  • '<SYSTEM32>\sc.exe' delete "MSSQL$PROGID"
  • '<SYSTEM32>\sc.exe' delete "MSSQL$WOLTERSKLUWER"
  • '<SYSTEM32>\sc.exe' delete "SQLAgent$WOLTERSKLUWER"
  • '<SYSTEM32>\sc.exe' delete ofcservice

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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Download by serial number

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.

Download Dr.Web

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

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