Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'AutoStart' = '%APPDATA%\filter.exe'
Creates the following files on removable media:
- <Drive name for removable media>:\.lnk
- <Drive name for removable media>:\.exe
Malicious functions:
Creates and executes the following:
- '%APPDATA%\filter.exe'
Modifies file system :
Creates the following files:
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\U98D4X8H\n09230945[1].asp
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\checkip.dyndns[1]
- %APPDATA%\filter.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\.exe
- %APPDATA%\filter.exe
Network activity:
Connects to:
- 'au######on.whatismyip.com':80
- 'ch####p.dyndns.org':80
TCP:
HTTP GET requests:
- au######on.whatismyip.com/n09230945.asp
- ch####p.dyndns.org/
UDP:
- DNS ASK au######on.whatismyip.com
- DNS ASK ch####p.dyndns.org
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: '(null)'
- ClassName: 'Shell_TrayWnd' WindowName: '(null)'