Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe <SYSTEM32>\sysico.exe'
Creates the following files on removable media:
- <Drive name for removable media>:\Autorun.inf
- <Drive name for removable media>:\system.exe
Malicious functions:
Executes the following:
- '<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\SuperHidden" /f /v UncheckedValue /t REG_DWORD /d 0
- '<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v Shell /t REG_SZ /d "Explorer.exe <SYSTEM32>\sysico.exe"
Modifies file system :
Creates the following files:
- C:\Autorun.inf
- C:\system.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\system.exe
- <Drive name for removable media>:\Autorun.inf
- C:\system.exe
- C:\Autorun.inf
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: '(null)'
