Technical Information
To ensure autorun and distribution
Sets the following service settings
- [HKLM\System\CurrentControlSet\Services\trjznbdl] 'Start' = '00000002'
- [HKLM\System\CurrentControlSet\Services\trjznbdl] 'ImagePath' = '%WINDIR%\SysWOW64\trjznbdl\lgkcsdfd.exe /d"<Full path to file>"'
- [HKLM\SYSTEM\CurrentControlSet\services\trjznbdl] 'ImagePath' = '%WINDIR%\SysWOW64\trjznbdl\lgkcsdfd.exe'
Creates the following services
- 'trjznbdl' %WINDIR%\SysWOW64\trjznbdl\lgkcsdfd.exe /d"<Full path to file>"
- 'trjznbdl' %WINDIR%\SysWOW64\trjznbdl\lgkcsdfd.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\trjznbdl' = '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%\lgkcsdfd.exe
Moves the following files
- from %TEMP%\lgkcsdfd.exe to %WINDIR%\syswow64\trjznbdl\lgkcsdfd.exe
Deletes itself.
Network activity
Connects to
- 'mi##########m.mail.protection.outlook.com':25
- '43.#31.4.7':443
UDP
- DNS ASK mi##########m.mail.protection.outlook.com
Miscellaneous
Creates and executes the following
- '%WINDIR%\syswow64\trjznbdl\lgkcsdfd.exe' /d"<Full path to file>"
Executes the following
- '%WINDIR%\syswow64\cmd.exe' /C mkdir %WINDIR%\SysWOW64\trjznbdl\
- '%WINDIR%\syswow64\cmd.exe' /C move /Y "%TEMP%\lgkcsdfd.exe" %WINDIR%\SysWOW64\trjznbdl\
- '%WINDIR%\syswow64\sc.exe' create trjznbdl binPath= "%WINDIR%\SysWOW64\trjznbdl\lgkcsdfd.exe /d\"<Full path to file>\"" type= own start= auto DisplayName= "wifi support"
- '%WINDIR%\syswow64\sc.exe' description trjznbdl "wifi internet conection"
- '%WINDIR%\syswow64\sc.exe' start trjznbdl
- '%WINDIR%\syswow64\svchost.exe'
- '%WINDIR%\syswow64\cmd.exe' /C mkdir %WINDIR%\SysWOW64\trjznbdl\' (with hidden window)
- '%WINDIR%\syswow64\cmd.exe' /C move /Y "%TEMP%\lgkcsdfd.exe" %WINDIR%\SysWOW64\trjznbdl\' (with hidden window)
- '%WINDIR%\syswow64\sc.exe' create trjznbdl binPath= "%WINDIR%\SysWOW64\trjznbdl\lgkcsdfd.exe /d\"<Full path to file>\"" type= own start= auto DisplayName= "wifi support"' (with hidden window)
- '%WINDIR%\syswow64\sc.exe' description trjznbdl "wifi internet conection"' (with hidden window)
- '%WINDIR%\syswow64\sc.exe' start trjznbdl' (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)
