Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Userinit' = '<SYSTEM32>\userinit.exe'
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'shell' = 'Explorer.exe "%WINDIR%\system\csrss.exe"'
Creates the following files on removable media:
- <Drive name for removable media>:\AUTORUN.INF
- <Drive name for removable media>:\Excel.exe
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
- file extensions
Modifies settings of Windows Explorer:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer] 'NoFolderOptions' = ''
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'Nofolderoptions' = ''
Modifies file system :
Creates the following files:
- C:\Excel.exe
- %ALLUSERSPROFILE%\Documents\Music.exe
- C:\AUTORUN.INF
- <DRIVERS>\intel.exe
- %WINDIR%\Autorun.inf
- %WINDIR%\system\csrss.exe
Sets the 'hidden' attribute to the following files:
- C:\AUTORUN.INF
- <Drive name for removable media>:\Excel.exe
- <Drive name for removable media>:\AUTORUN.INF
- %WINDIR%\system\csrss.exe
- <DRIVERS>\intel.exe
- C:\Excel.exe
Deletes the following files:
- %TEMP%\~DF7BAA.tmp
- C:\Excel.exe
- C:\AUTORUN.INF
Miscellaneous:
Searches for the following windows:
- ClassName: 'Edit' WindowName: '(null)'
- ClassName: 'ComboBox' WindowName: '(null)'
- ClassName: 'ComboBoxEx32' WindowName: '(null)'
- ClassName: '(null)' WindowName: 'Administrative Tools'
- ClassName: '(null)' WindowName: 'search results'
- ClassName: '#32770' WindowName: '(null)'
- ClassName: 'RebarWindow32' WindowName: '(null)'
- ClassName: '(null)' WindowName: 'Folder Options'
- ClassName: '(null)' WindowName: 'Registry Editor'
- ClassName: 'RegEdit_RegEdit' WindowName: '(null)'
- ClassName: 'CabinetWClass' WindowName: '(null)'
- ClassName: 'ExploreWClass' WindowName: '(null)'
- ClassName: '(null)' WindowName: 'Local Settings'
