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Trojan.Siggen8.53314

Added to the Dr.Web virus database: 2019-11-03

Virus description added:

Technical Information

To ensure autorun and distribution
Creates the following services
  • [<HKLM>\SYSTEM\CurrentControlSet\Services\556452577] 'ImagePath' = '%ProgramFiles(x86)%\Mozilla Firefox\556452577.sys'
Malicious functions
Injects code into
the following user processes:
  • firefox.exe
Modifies file system
Creates the following files
  • %TEMP%\icon.ico
  • %ProgramFiles(x86)%\mozilla firefox\556452577.sys
Deletes the following files
  • <DRIVERS>\etc\hosts
  • %ProgramFiles(x86)%\mozilla firefox\556452577.sys
Substitutes the HOSTS file.
Network activity
TCP
HTTP GET requests
  • http://43.###.222.21:8089/hosts.txt
  • http://43.###.222.21:8080/yyroom/ZZ.key
  • http://to##u.me//ZZ.key
UDP
  • DNS ASK vi#.#fxbkj.com
  • DNS ASK b.###bkj.com
  • DNS ASK to###.#e.cdn.dnsv1.com
  • DNS ASK to##u.me
Miscellaneous
Searches for the following windows
  • ClassName: 'QWidget' WindowName: '3879'
  • ClassName: 'QWidget' WindowName: '3879-¡¾Éñ»°¡¿»ðÏß×Ͻ𹤻ᣬ´óÐÍÍøÓοªºÚ¹¤»á£¬ÎÒÃÇÒ»Ö±ÓÃÐÄÔÚ×ö£¡'
Creates and executes the following
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Administrators:N' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Remote Desktop Users:N' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Remote Desktop Users:r' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Replicator:N' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Replicator:r' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Users:N' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Users:r' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Event Log Readers:r' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Debugger Users:N' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p HomeUsers:N' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g HomeUsers:r' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p IIS_WPG:N' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g IIS_WPG:r' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p everyone:N' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g everyone:r' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Power Users:N' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Power Users:r' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Performance Monitor Users:r' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Performance Monitor Users:N' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Performance Log Users:r' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Backup Operators:N' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Backup Operators:r' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Cryptographic Operators:N' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Cryptographic Operators:r' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Distributed COM Users:N' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Distributed COM Users:r' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p user:N' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Debugger Users:r' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Event Log Readers:N' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Guests:r' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p IIS_IUSRS:N' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g IIS_IUSRS:r' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Network Configuration Operators:N' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Network Configuration Operators:r' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Performance Log Users:N' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Administrators:r' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Guests:N' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g user:r' (with hidden window)
Executes the following
  • '%ProgramFiles(x86)%\mozilla firefox\firefox.exe' 100861008671
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /t /p Users:N
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Users:N
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /g Replicator:r
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Replicator:r
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /t /p Replicator:N
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Replicator:N
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /g Remote Desktop Users:r
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Remote Desktop Users:r
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /t /p Remote Desktop Users:N
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Remote Desktop Users:N
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /g Power Users:r
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Power Users:r
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /t /p Power Users:N
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Power Users:N
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /g Performance Monitor Users:r
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Users:r
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /g Users:r
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Debugger Users:N
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /t /p Debugger Users:N
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /t /p user:N
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p user:N
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /g everyone:r
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g everyone:r
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /t /p everyone:N
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p everyone:N
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /g IIS_WPG:r
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /t /p IIS_WPG:N
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g IIS_WPG:r
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p IIS_WPG:N
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /g HomeUsers:r
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g HomeUsers:r
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /t /p HomeUsers:N
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p HomeUsers:N
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /g Debugger Users:r
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Debugger Users:r
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g user:r
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Performance Monitor Users:r
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /t /p Performance Monitor Users:N
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Performance Monitor Users:N
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Distributed COM Users:r
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /t /p Distributed COM Users:N
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Distributed COM Users:N
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /g Cryptographic Operators:r
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Cryptographic Operators:r
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /t /p Cryptographic Operators:N
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Cryptographic Operators:N
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /g Backup Operators:r
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Backup Operators:r
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /t /p Backup Operators:N
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Backup Operators:N
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /g Administrators:r
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Administrators:r
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /t /p Administrators:N
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Administrators:N
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /g Distributed COM Users:r
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Event Log Readers:N
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /t /p Event Log Readers:N
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Event Log Readers:r
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Performance Log Users:r
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /t /p Performance Log Users:N
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Performance Log Users:N
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /g Network Configuration Operators:r
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Network Configuration Operators:r
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /t /p Network Configuration Operators:N
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Network Configuration Operators:N
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g IIS_IUSRS:r
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /g IIS_IUSRS:r
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /t /p IIS_IUSRS:N
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p IIS_IUSRS:N
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /g Guests:r
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /g Guests:r
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /t /p Guests:N
  • '%WINDIR%\syswow64\cmd.exe' /c cacls.exe <DRIVERS>\etc\hosts /e /t /p Guests:N
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /g Event Log Readers:r
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /g Performance Log Users:r
  • '%WINDIR%\syswow64\cacls.exe' <DRIVERS>\etc\hosts /e /g user:r

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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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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