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Trojan.DownLoader33.41163

Added to the Dr.Web virus database: 2020-05-14

Virus description added:

Technical Information

To ensure autorun and distribution
Creates the following services
  • [<HKLM>\System\CurrentControlSet\Services\IKEEXT] 'Start' = '00000002'
Malicious functions
Executes the following
  • '%WINDIR%\syswow64\net.exe' stop ?Security Center?
  • '%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 InoRT /y
  • '%WINDIR%\syswow64\net.exe' stop "Sygate Personal Firewall Pro" /y
  • '%WINDIR%\syswow64\net.exe' stop InoTask /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 "*Symanteccmdline" /y
  • '%WINDIR%\syswow64\net.exe' stop "*McAfeecmdline" /y
  • '%WINDIR%\syswow64\net.exe' stop "*nortoncmdline" /y
  • '%WINDIR%\syswow64\net.exe' stop ERSvc /y
  • '%WINDIR%\syswow64\net.exe' stop helpsvc /y
  • '%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 "McAfee SecurityCenter Update Manager" /y
  • '%WINDIR%\syswow64\net.exe' stop "Symantec SPBBCSvc" /y
  • '%WINDIR%\syswow64\net.exe' stop "Ahnlab Task Scheduler" /y
  • '%WINDIR%\syswow64\net.exe' stop netsvcs
  • '%WINDIR%\syswow64\net.exe' stop "norton AntiVirus Corporate Edition" /y
  • '%WINDIR%\syswow64\net.exe' stop navapsvc /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\net.exe' stop mcupdmgr.exe /y
  • '%WINDIR%\syswow64\net.exe' stop "McAfeeAntiSpyware" /y
  • '%WINDIR%\syswow64\netsh.exe' firewall set opmode mode=disable
  • '%WINDIR%\syswow64\net.exe' stop vrmonsvc /y
  • '%WINDIR%\syswow64\net.exe' stop spoolnt
Modifies file system
Creates the following files
  • %TEMP%\ytmp\tmp88497.bat
  • %TEMP%\ytmp\tmp89017.exe
Network activity
TCP
  • 'yo##ube.com':443
  • 'fo###.gstatic.com':443
  • 'fo###.#oogleapis.com':443
  • 'r4########ne6ns6.googlevideo.com':443
  • 'r5########ne6n7s.googlevideo.com':443
  • 'accounts.google.com':443
  • 'r3########ne6nsd.googlevideo.com':443
UDP
  • DNS ASK yo##ube.com
  • DNS ASK fo###.gstatic.com
  • DNS ASK s.##img.com
  • DNS ASK fo###.#oogleapis.com
  • DNS ASK r4########ne6ns6.googlevideo.com
  • DNS ASK accounts.google.com
  • DNS ASK r5########ne6n7s.googlevideo.com
  • DNS ASK r3########ne6nsd.googlevideo.com
Miscellaneous
Searches for the following windows
  • ClassName: 'DDEMLMom' WindowName: ''
  • ClassName: 'IEFrame' WindowName: ''
  • ClassName: 'Static' WindowName: ''
  • ClassName: 'MS_AutodialMonitor' WindowName: ''
  • ClassName: 'MS_WebCheckMonitor' WindowName: ''
Executes the following
  • '%WINDIR%\syswow64\cmd.exe' /c if not exist "%TEMP%\afolder" mkdir "%TEMP%\afolder"
  • '%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 InoRPC /y
  • '%WINDIR%\syswow64\net1.exe' stop "Symantec AntiVirus Client" /y
  • '%WINDIR%\syswow64\net1.exe' stop "Serv-U" /y
  • '%WINDIR%\syswow64\net1.exe' stop ccPwdSvc /y
  • '%WINDIR%\syswow64\net1.exe' stop "*McAfeecmdline" /y
  • '%WINDIR%\syswow64\net1.exe' stop "*Symanteccmdline" /y
  • '%WINDIR%\syswow64\net1.exe' stop "*nortoncmdline" /y
  • '%WINDIR%\syswow64\net1.exe' stop ERSvc /y
  • '%WINDIR%\syswow64\net1.exe' stop "norton AntiVirus Client" /y
  • '%WINDIR%\syswow64\net1.exe' stop "SyGateService" /y
  • '%WINDIR%\syswow64\calc.exe'
  • '%WINDIR%\syswow64\net1.exe' stop "norton AntiVirus Corporate Edition" /y
  • '%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 helpsvc /y
  • '%WINDIR%\syswow64\net1.exe' stop "Sophos Anti-Virus" /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\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 InoRT /y
  • '%WINDIR%\syswow64\net1.exe' stop InoTask /y
  • '%WINDIR%\syswow64\net1.exe' stop "McAfeeAntiSpyware" /y
  • '%WINDIR%\syswow64\net1.exe' stop "McAfee Personal Firewall 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 "norton AntiVirus Auto Protect Service" /y
  • '%WINDIR%\syswow64\net1.exe' stop ?Security Center?
  • '%WINDIR%\syswow64\cmd.exe' /c if exist "%TEMP%\ytmp\tmp89017.exe" del "%TEMP%\ytmp\tmp89017.exe"
  • '%WINDIR%\syswow64\cmd.exe' /c if exist "%TEMP%\ytmp\tmp88497.bat" del "%TEMP%\ytmp\tmp88497.bat"
  • '%WINDIR%\syswow64\cmd.exe' /c cls
  • '%WINDIR%\syswow64\attrib.exe' +h %TEMP%\ytmp
  • '%WINDIR%\syswow64\cmd.exe' /c attrib +h %TEMP%\ytmp
  • '%WINDIR%\syswow64\cmd.exe' /c if not exist "%TEMP%\ytmp" mkdir "%TEMP%\ytmp"
  • '%WINDIR%\syswow64\cmd.exe' /c %TEMP%\ytmp\tmp88497.bat "<Full path to file>"
  • '%WINDIR%\syswow64\net1.exe' stop SAVScan /y
  • '%WINDIR%\syswow64\net1.exe' stop MpfService /y
  • '%WINDIR%\syswow64\net1.exe' stop "McAfee SecurityCenter Update Manager" /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 ccSetMGR /y
  • '%WINDIR%\syswow64\net1.exe' stop mcupdmgr.exe /y
  • '%WINDIR%\syswow64\net1.exe' stop NProtectService /y
  • '%WINDIR%\syswow64\net1.exe' stop MonSvcNT /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 Spamkiller Server" /y
  • '%WINDIR%\syswow64\cmd.exe'

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.

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Download on App Store

After booting up, run a full scan of all disk partitions with Dr.Web Anti-virus for Linux.

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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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