Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Userinit' = '<SYSTEM32>\userinit.exe,%APPDATA%\winlogon.exe'
Creates the following files on removable media:
- <Drive name for removable media>:\Autorun.inf
- <Drive name for removable media>:\SYSTEM.EXE
Malicious functions:
Creates and executes the following:
- %APPDATA%\winlogon.exe /k <Full path to virus>
Executes the following:
- <SYSTEM32>\netsh.exe firewall add allowedprogram "%APPDATA%\winlogon.exe" winlogon Enable
Modifies file system :
Creates the following files:
- %APPDATA%\RCX1.tmp
- %APPDATA%\winlogon.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\Autorun.inf
- <Drive name for removable media>:\SYSTEM.EXE
- %APPDATA%\winlogon.exe
Deletes the following files:
- %APPDATA%\winlogon.exe
Deletes itself.
Network activity:
Connects to:
- 'sn######syou.dyndns.info':3178
UDP:
- DNS ASK sn######syou.dyndns.info
- '<Private IP address>':1037
Miscellaneous:
Searches for the following windows:
- ClassName: '' WindowName: 'BHH'
