Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'MicrosoftВ® WindowsВ® Operating System' = '%APPDATA%\Microsoft\Protect\Credentials\taskhostt.exe'
- [<HKLM>\Software\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe "%APPDATA%\lsass.exe"'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'MSWUpdate' = '"%APPDATA%\lsass.exe"'
- [<HKLM>\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run] 'MSWUpdate' = '"%APPDATA%\lsass.exe"'
Creates the following files on removable media
- <Drive name for removable media>:\system.exe
- <Drive name for removable media>:\autorun.inf
Malicious functions
Executes the following
- '%WINDIR%\syswow64\netsh.exe' firewall add allowedprogram "%APPDATA%\lsass.exe" CityScape Enable
Injects code into
the following user processes:
- lsass.exe
Modifies file system
Creates the following files
- %APPDATA%\microsoft\protect\credentials\wmpnetvk.gzp
- %APPDATA%\microsoft\protect\credentials\taskhostt.gzp
- %APPDATA%\lsass.exe
Sets the 'hidden' attribute to the following files
- %APPDATA%\microsoft\protect\credentials\wmpnetvk.exe
- %APPDATA%\microsoft\protect\credentials\taskhostt.exe
- %APPDATA%\lsass.exe
- <Drive name for removable media>:\system.exe
- <Drive name for removable media>:\autorun.inf
Moves the following files
- from %APPDATA%\microsoft\protect\credentials\taskhostt.gzp to %APPDATA%\microsoft\protect\credentials\taskhostt.exe
- from %APPDATA%\microsoft\protect\credentials\wmpnetvk.gzp to %APPDATA%\microsoft\protect\credentials\wmpnetvk.exe
Network activity
UDP
- DNS ASK pt####0.dyndns.info
Miscellaneous
Searches for the following windows
- ClassName: '' WindowName: 'HB'
Creates and executes the following
- '%APPDATA%\microsoft\protect\credentials\taskhostt.exe'
- '%APPDATA%\microsoft\protect\credentials\wmpnetvk.exe'
- '%APPDATA%\lsass.exe' /d <Full path to file>
- '%APPDATA%\lsass.exe' /d %APPDATA%\Microsoft\Protect\Credentials\wmpnetvk.exe
- '%APPDATA%\lsass.exe'
- '%WINDIR%\syswow64\netsh.exe' firewall add allowedprogram "%APPDATA%\lsass.exe" CityScape Enable' (with hidden window)
Executes the following
- '%WINDIR%\syswow64\cmd.exe'