Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'MSWUpdate' = '"%APPDATA%\lsass.exe"'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'MSWUpdate' = '"%APPDATA%\lsass.exe"'
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe "%APPDATA%\lsass.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%\lsass.exe
Executes the following:
- <SYSTEM32>\netsh.exe firewall add allowedprogram program = %APPDATA%\lsass.exename = Nero mode = ENABLE
Modifies file system :
Creates the following files:
- %APPDATA%\lsass.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\Autorun.inf
- <Drive name for removable media>:\SYSTEM.EXE
- %APPDATA%\lsass.exe
Deletes itself.
Network activity:
Connects to:
- 'gr#.#yndns.info':3175
UDP:
- DNS ASK gr#.#yndns.info
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: ''
- ClassName: '' WindowName: 'HB'
