Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [<HKLM>\Software\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Userinit' = '<SYSTEM32>\Userinit.exe,C:\svchost.exe'
Malicious functions
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
- file extensions
Modifies file system
Creates the following files
- C:\svchost.exe
- %WINDIR%\sp.htm
- <SYSTEM32>\launch.bat
- <SYSTEM32>\launch.vbs
- <Current directory>\workgroup
- <Current directory>\windows_7full.scr
- <SYSTEM32>\s4c.vbs
- <Current directory>\tmp
Sets the 'hidden' attribute to the following files
- C:\svchost.exe
Deletes the following files
- <SYSTEM32>\s4c.vbs
Network activity
UDP
- DNS ASK co####city-team.com
Miscellaneous
Creates and executes the following
- '<SYSTEM32>\wscript.exe' "<SYSTEM32>\launch.vbs"
- '<SYSTEM32>\cmd.exe' /c ""<SYSTEM32>\launch.bat" "' (with hidden window)
Executes the following
- '<SYSTEM32>\cmd.exe' /c ""<SYSTEM32>\launch.bat" "
- '<SYSTEM32>\wscript.exe' "<SYSTEM32>\s4c.vbs"
