Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '52b71d089f8ae2a1977b99cae39ebd20' = '"%ALLUSERSPROFILE%\Windows firewall update for microsoft.exe" ..'
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '52b71d089f8ae2a1977b99cae39ebd20' = '"%ALLUSERSPROFILE%\Windows firewall update for microsoft.exe" ..'
Creates or modifies the following files:
- %HOMEPATH%\Start Menu\Programs\Startup\52b71d089f8ae2a1977b99cae39ebd20.exe
Creates the following files on removable media:
- <Drive name for removable media>:\52b71d089f8ae2a1977b99cae39ebd20.exe
- <Drive name for removable media>:\autorun.inf
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%ALLUSERSPROFILE%\Windows firewall update for microsoft.exe' = '%ALLUS...
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
Executes the following:
- '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%ALLUSERSPROFILE%\Windows firewall update for microsoft.exe" "Windows firewall update for microsoft.exe" ENABLE
Modifies file system:
Creates the following files:
- %ALLUSERSPROFILE%\Windows firewall update for microsoft.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\52b71d089f8ae2a1977b99cae39ebd20.exe
- <Drive name for removable media>:\autorun.inf
- %ALLUSERSPROFILE%\Windows firewall update for microsoft.exe
- %HOMEPATH%\Start Menu\Programs\Startup\52b71d089f8ae2a1977b99cae39ebd20.exe
Network activity:
Connects to:
- 'vo#########rou-minha-dns.duckdns.org':5555
UDP:
- DNS ASK vo#########rou-minha-dns.duckdns.org
Miscellaneous:
Creates and executes the following:
- '%ALLUSERSPROFILE%\Windows firewall update for microsoft.exe'
