Technical Information
To ensure autorun and distribution
Sets the following service settings
- [<HKLM>\System\CurrentControlSet\Services\gyxgctcc] 'Start' = '00000002'
- [<HKLM>\System\CurrentControlSet\Services\gyxgctcc] 'ImagePath' = '%WINDIR%\SysWOW64\gyxgctcc\tignakw.exe'
Creates the following services
- 'gyxgctcc' %WINDIR%\SysWOW64\gyxgctcc\tignakw.exe
Malicious functions
To complicate detection of its presence in the operating system,
adds antivirus exclusion with following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths] '%WINDIR%\SysWOW64\gyxgctcc' = '00000000'
Executes the following
- '%WINDIR%\syswow64\netsh.exe' advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="%WINDIR%\SysWOW64\svchost.exe" enable=yes>nul
Injects code into
the following system processes:
- %WINDIR%\syswow64\svchost.exe
Modifies file system
Creates the following files
- %TEMP%\tignakw.exe
- %TEMP%\8144.bat
Moves the following files
- from %TEMP%\tignakw.exe to %WINDIR%\syswow64\gyxgctcc\tignakw.exe
Deletes itself.
Network activity
Connects to
- 'mi##########m.mail.protection.outlook.com':25
- '11#.#21.193.242':443
UDP
- DNS ASK mi##########m.mail.protection.outlook.com
Miscellaneous
Creates and executes the following
- '%WINDIR%\syswow64\gyxgctcc\tignakw.exe'
- '%WINDIR%\syswow64\cmd.exe' /C mkdir %WINDIR%\SysWOW64\gyxgctcc\' (with hidden window)
- '%WINDIR%\syswow64\cmd.exe' /C move /Y "%TEMP%\tignakw.exe" %WINDIR%\SysWOW64\gyxgctcc\' (with hidden window)
- '%WINDIR%\syswow64\sc.exe' create gyxgctcc binPath= "%WINDIR%\SysWOW64\gyxgctcc\tignakw.exe" type= own start= auto DisplayName= "P2P Support"' (with hidden window)
- '%WINDIR%\syswow64\sc.exe' description gyxgctcc "Internet Mobile Support"' (with hidden window)
- '%WINDIR%\syswow64\sc.exe' start gyxgctcc' (with hidden window)
- '%WINDIR%\syswow64\netsh.exe' advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="%WINDIR%\SysWOW64\svchost.exe" enable=yes>nul' (with hidden window)
- '%WINDIR%\syswow64\cmd.exe' /c ""%TEMP%\8144.bat" "' (with hidden window)
Executes the following
- '%WINDIR%\syswow64\cmd.exe' /C mkdir %WINDIR%\SysWOW64\gyxgctcc\
- '%WINDIR%\syswow64\cmd.exe' /C move /Y "%TEMP%\tignakw.exe" %WINDIR%\SysWOW64\gyxgctcc\
- '%WINDIR%\syswow64\sc.exe' create gyxgctcc binPath= "%WINDIR%\SysWOW64\gyxgctcc\tignakw.exe" type= own start= auto DisplayName= "P2P Support"
- '%WINDIR%\syswow64\sc.exe' description gyxgctcc "Internet Mobile Support"
- '%WINDIR%\syswow64\sc.exe' start gyxgctcc
- '%WINDIR%\syswow64\cmd.exe' /c ""%TEMP%\8144.bat" "
- '%WINDIR%\syswow64\svchost.exe'
