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Trojan.Encoder.29723

Added to the Dr.Web virus database: 2019-10-08

Virus description added:

Technical Information

To ensure autorun and distribution
Creates or modifies the following files
  • <SYSTEM32>\tasks\_nemty_o6dttbk_
Creates the following files on removable media
  • <Drive name for removable media>:\_nemty_o6dttbk_-decrypt.txt
  • <Drive name for removable media>:\february_catalogue__2015.doc
  • <Drive name for removable media>:\cveuropeo.doc
  • <Drive name for removable media>:\508softwareandos.doc
  • <Drive name for removable media>:\contosoroot_1.cer
  • <Drive name for removable media>:\contoso.cer
  • <Drive name for removable media>:\testcertificate.cer
  • <Drive name for removable media>:\pmd.cer
  • <Drive name for removable media>:\contosoroot.cer
  • <Drive name for removable media>:\contoso_1.cer
  • <Drive name for removable media>:\default.bmp
  • <Drive name for removable media>:\dashborder_120.bmp
  • <Drive name for removable media>:\dial.bmp
  • <Drive name for removable media>:\toolbar.bmp
  • <Drive name for removable media>:\split.avi
  • <Drive name for removable media>:\delete.avi
  • <Drive name for removable media>:\correct.avi
  • <Drive name for removable media>:\000814251_video_01.avi
  • <Drive name for removable media>:\lisp_success.doc
  • <Drive name for removable media>:\uep_form_786_bulletin_1726i602.doc
Malicious functions
To complicate detection of its presence in the operating system,
deletes volume shadow copies.
Executes the following
  • '%WINDIR%\syswow64\taskkill.exe' /f /im sql.*
  • '%WINDIR%\syswow64\net.exe' stop SQLAgent$SQLEXPRESS
  • '%WINDIR%\syswow64\net.exe' stop SQLBrowser
  • '%WINDIR%\syswow64\net.exe' stop AcrSch2Svc
  • '%WINDIR%\syswow64\net.exe' stop Apache2.4
  • '%WINDIR%\syswow64\taskkill.exe' /f /im Flow.*
  • '%WINDIR%\syswow64\net.exe' stop SQLWriter
  • '%WINDIR%\syswow64\net.exe' stop MSSQL$SQLEXPRESS
  • '%WINDIR%\syswow64\net.exe' stop AcronisAgent
  • '%WINDIR%\syswow64\net.exe' stop cbVSCService11
  • '%WINDIR%\syswow64\net.exe' stop MSSQLServerADHelper100
  • '%WINDIR%\syswow64\net.exe' stop QBCFMontorService
  • '%WINDIR%\syswow64\net.exe' stop OracleServiceXE
  • '%WINDIR%\syswow64\net.exe' stop OracleXETNSListener
  • '%WINDIR%\syswow64\net.exe' stop MongoDB
  • '%WINDIR%\syswow64\taskkill.exe' /f /im thunderbird.*
  • '%WINDIR%\syswow64\taskkill.exe' /f /im excel.*
  • '%WINDIR%\syswow64\taskkill.exe' /f /im WBGX.*
  • '%WINDIR%\syswow64\net.exe' stop
  • '%WINDIR%\syswow64\net.exe' stop QBVSS
  • '%WINDIR%\syswow64\taskkill.exe' /f /im node.*
  • '%WINDIR%\syswow64\taskkill.exe' /f /im QBW32.*
  • '%WINDIR%\syswow64\taskkill.exe' /f /im onenote.*
  • '%WINDIR%\syswow64\taskkill.exe' /f /im virtualboxvm.*
  • '%WINDIR%\syswow64\taskkill.exe' /f /im wordpad.*
  • '%WINDIR%\syswow64\taskkill.exe' /f /im outlook.*
  • '%WINDIR%\syswow64\taskkill.exe' /f /im oracle.*
  • '%WINDIR%\syswow64\taskkill.exe' /f /im Teams.*
  • '%WINDIR%\syswow64\taskkill.exe' /f /im winword.*
  • '%WINDIR%\syswow64\net.exe' stop DbxSvc
  • '%WINDIR%\syswow64\net.exe' stop CobianBackup11
Modifies file system
Creates the following files
  • %APPDATA%\microsoft\crypto\rsa\s-1-5-21-1960123792-2022915161-3775307078-1001\650860e5119ec19a8de142e32f03c712_36d1130a-ac2e-44f7-9dc1-e424fbcbe0ee
  • C:\far2\plugins\compare\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\plugins\drawline\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\plugins\editcase\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\plugins\emenu\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\plugins\farcmds\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\plugins\filecase\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\plugins\ftp\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\plugins\ftp\lib\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\plugins\autowrap\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\plugins\brackets\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\plugins\hlfviewer\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\plugins\proclist\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\plugins\tmppanel\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\pluginsdk\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\pluginsdk\headers.c\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\pluginsdk\headers.pas\_nemty_o6dttbk_-decrypt.txt
  • C:\msocache\_nemty_o6dttbk_-decrypt.txt
  • C:\msocache\all users\_nemty_o6dttbk_-decrypt.txt
  • C:\msocache\all users\{90140000-0011-0000-1000-0000000ff1ce}-c\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\plugins\macroview\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\plugins\network\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\plugins\arclite\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\plugins\align\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\plugins\_nemty_o6dttbk_-decrypt.txt
  • %APPDATA%\microsoft\crypto\rsa\s-1-5-21-1960123792-2022915161-3775307078-1001\94a9cdfb09e37d01f75d09c2c4488906_36d1130a-ac2e-44f7-9dc1-e424fbcbe0ee
  • C:\_nemty_o6dttbk_-decrypt.txt
  • C:\documents and settings\_nemty_o6dttbk_-decrypt.txt
  • D:\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\addons\colors\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\addons\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\addons\colors\custom_highlighting\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\addons\colors\default_highlighting\_nemty_o6dttbk_-decrypt.txt
  • %HOMEPATH%\adobeupdate.exe
  • C:\far2\addons\macros\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\addons\shell\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\addons\xlat\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\addons\xlat\russian\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\documentation\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\documentation\eng\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\documentation\rus\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\encyclopedia\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\encyclopedia\tap\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\fexcept\_nemty_o6dttbk_-decrypt.txt
  • C:\far2\addons\setup\_nemty_o6dttbk_-decrypt.txt
  • C:\msocache\all users\{90140000-0016-0409-1000-0000000ff1ce}-c\_nemty_o6dttbk_-decrypt.txt
  • C:\msocache\all users\{90140000-0018-0409-1000-0000000ff1ce}-c\_nemty_o6dttbk_-decrypt.txt
Sets the 'hidden' attribute to the following files
  • %HOMEPATH%\adobeupdate.exe
Modifies user data files (Trojan.Encoder).
Changes user data files extensions (Trojan.Encoder).
Network activity
UDP
  • DNS ASK ap#.#pify.org
  • DNS ASK ne##y.hk
Miscellaneous
Searches for the following windows
  • ClassName: '' WindowName: ''
Creates and executes the following
  • '%WINDIR%\syswow64\cmd.exe' vssadmin resize shadowstorage /for=A: /on=A: /maxsize=401MB' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c net stop DbxSvc' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c net stop OracleXETNSListener' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c net stop OracleServiceXE' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c net stop AcrSch2Svc' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c net stop AcronisAgent' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c net stop Apache2.4' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c net stop SQLWriter' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c net stop MSSQL$SQLEXPRESS' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c net stop MSSQLServerADHelper100' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c net stop MongoDB' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c net stop SQLAgent$SQLEXPRESS' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c net stop SQLBrowser' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c net stop CobianBackup11' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c net stop cbVSCService11' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c net stop QBCFMontorService' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c net stop QBVSS' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c net stop' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im Flow.*' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c schtasks.exe /create /sc onstart /tn "_NEMTY_O6DTTBK_" /tr "%HOMEPATH%\AdobeUpdate.exe"' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im Teams.*' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im QBW32.*' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' vssadmin resize shadowstorage /for=A: /on=A: /maxsize=unbounded' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' vssadmin resize shadowstorage /for=C: /on=C: /maxsize=401MB' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' vssadmin resize shadowstorage /for=C: /on=C: /maxsize=unbounded' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' vssadmin resize shadowstorage /for=D: /on=D: /maxsize=401MB' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' vssadmin resize shadowstorage /for=D: /on=D: /maxsize=unbounded' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' vssadmin resize shadowstorage /for=F: /on=F: /maxsize=401MB' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' vssadmin resize shadowstorage /for=F: /on=F: /maxsize=unbounded' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im sql.*' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im winword.*' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im wordpad.*' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im outlook.*' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im thunderbird.*' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im oracle.*' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im excel.*' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im onenote.*' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im virtualboxvm.*' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im node.*' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im WBGX.*' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c vssadmin.exe delete shadows /all /quiet & bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no & wbadmin delete catalog -quiet & wmic shadowc...' (with hidden window)
Executes the following
  • '%WINDIR%\syswow64\cmd.exe' vssadmin resize shadowstorage /for=A: /on=A: /maxsize=401MB
  • '%WINDIR%\syswow64\cmd.exe' /c net stop SQLBrowser
  • '%WINDIR%\syswow64\cmd.exe' /c net stop CobianBackup11
  • '%WINDIR%\syswow64\cmd.exe' /c net stop cbVSCService11
  • '%WINDIR%\syswow64\cmd.exe' /c net stop QBCFMontorService
  • '%WINDIR%\syswow64\cmd.exe' /c net stop QBVSS
  • '%WINDIR%\syswow64\cmd.exe' /c net stop
  • '%WINDIR%\syswow64\cmd.exe' /c schtasks.exe /create /sc onstart /tn "_NEMTY_O6DTTBK_" /tr "%HOMEPATH%\AdobeUpdate.exe"
  • '%WINDIR%\syswow64\cmd.exe' /c vssadmin.exe delete shadows /all /quiet & bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no & wbadmin delete catalog -quiet & wmic shadowc...
  • '%WINDIR%\syswow64\schtasks.exe' /create /sc onstart /tn "_NEMTY_O6DTTBK_" /tr "%HOMEPATH%\AdobeUpdate.exe"
  • '<SYSTEM32>\vssvc.exe'
  • '%WINDIR%\syswow64\net1.exe' stop MongoDB
  • '%WINDIR%\syswow64\cmd.exe' /c net stop MongoDB
  • '%WINDIR%\syswow64\cmd.exe' /c net stop SQLAgent$SQLEXPRESS
  • '%WINDIR%\syswow64\net1.exe' stop AcrSch2Svc
  • '%WINDIR%\syswow64\net1.exe' stop QBVSS
  • '%WINDIR%\syswow64\net1.exe' stop CobianBackup11
  • '%WINDIR%\syswow64\net1.exe' stop OracleServiceXE
  • '%WINDIR%\syswow64\net1.exe' stop MSSQL$SQLEXPRESS
  • '%WINDIR%\syswow64\net1.exe' stop AcronisAgent
  • '%WINDIR%\syswow64\net1.exe' stop Apache2.4
  • '%WINDIR%\syswow64\net1.exe' stop SQLWriter
  • '%WINDIR%\syswow64\net1.exe' stop
  • '%WINDIR%\syswow64\net1.exe' stop OracleXETNSListener
  • '%WINDIR%\syswow64\net1.exe' stop cbVSCService11
  • '%WINDIR%\syswow64\net1.exe' stop MSSQLServerADHelper100
  • '%WINDIR%\syswow64\net1.exe' stop DbxSvc
  • '%WINDIR%\syswow64\net1.exe' stop QBCFMontorService
  • '%WINDIR%\syswow64\cmd.exe' /c net stop MSSQLServerADHelper100
  • '%WINDIR%\syswow64\cmd.exe' /c net stop MSSQL$SQLEXPRESS
  • '%WINDIR%\syswow64\cmd.exe' /c net stop SQLWriter
  • '%WINDIR%\syswow64\cmd.exe' vssadmin resize shadowstorage /for=C: /on=C: /maxsize=401MB
  • '%WINDIR%\syswow64\cmd.exe' vssadmin resize shadowstorage /for=C: /on=C: /maxsize=unbounded
  • '%WINDIR%\syswow64\cmd.exe' vssadmin resize shadowstorage /for=D: /on=D: /maxsize=401MB
  • '%WINDIR%\syswow64\cmd.exe' vssadmin resize shadowstorage /for=D: /on=D: /maxsize=unbounded
  • '%WINDIR%\syswow64\cmd.exe' vssadmin resize shadowstorage /for=F: /on=F: /maxsize=401MB
  • '%WINDIR%\syswow64\cmd.exe' vssadmin resize shadowstorage /for=F: /on=F: /maxsize=unbounded
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im sql.*
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im winword.*
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im wordpad.*
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im outlook.*
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im thunderbird.*
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im oracle.*
  • '%WINDIR%\syswow64\cmd.exe' vssadmin resize shadowstorage /for=A: /on=A: /maxsize=unbounded
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im excel.*
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im virtualboxvm.*
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im node.*
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im QBW32.*
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im WBGX.*
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im Teams.*
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im Flow.*
  • '%WINDIR%\syswow64\cmd.exe' /c net stop DbxSvc
  • '%WINDIR%\syswow64\cmd.exe' /c net stop OracleXETNSListener
  • '%WINDIR%\syswow64\cmd.exe' /c net stop OracleServiceXE
  • '%WINDIR%\syswow64\cmd.exe' /c net stop AcrSch2Svc
  • '%WINDIR%\syswow64\cmd.exe' /c net stop AcronisAgent
  • '%WINDIR%\syswow64\cmd.exe' /c net stop Apache2.4
  • '%WINDIR%\syswow64\cmd.exe' /c taskkill /f /im onenote.*
  • '%WINDIR%\syswow64\net1.exe' stop SQLAgent$SQLEXPRESS
  • '%WINDIR%\syswow64\net1.exe' stop SQLBrowser

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.
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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);
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    • Switch off your device and turn it on as normal.

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