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Added to the Dr.Web virus database: 2011-06-29

Virus description added:

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
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'

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