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Win32.HLLW.Autoruner.56168

Added to the Dr.Web virus database: 2011-08-13

Virus description added:

Technical Information

To ensure autorun and distribution
Modifies the following registry keys
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Windows Update' = '%TEMP%\<File name>.exe'
Creates the following files on removable media
  • <Drive name for removable media>:\autorun.ini
Malicious functions
To bypass firewall, removes or modifies the following registry keys
  • [<HKLM>\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\svchost.exe' = '%APPDATA%\svchost.exe:*:Enabled:Windows ...
  • [<HKLM>\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\vbc.exe' = '%TEMP%\vbc.exe:*:Enabled:Windows Messanger'
  • [<HKLM>\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DoNotAllowExceptions' = '00000000'
Injects code into
the following user processes:
  • vbc.exe
Modifies file system
Creates the following files
  • %TEMP%\<File name>.exe
  • %TEMP%\vbc.exe
  • %APPDATA%\svchost.exe
  • %APPDATA%\data.dat
Sets the 'hidden' attribute to the following files
  • <Drive name for removable media>:\autorun.ini
Network activity
UDP
  • DNS ASK ch######ntures.zapto.org
Miscellaneous
Creates and executes the following
  • '%TEMP%\vbc.exe'
  • '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%TEMP%\vbc.exe" /t REG_SZ /d "%TEMP%\vbc.exe:*:Enabled:W...' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\svchost.exe" /t REG_SZ /d "%APPDATA%\svchost.e...' (with hidden window)
Executes the following
  • '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
  • '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%TEMP%\vbc.exe" /t REG_SZ /d "%TEMP%\vbc.exe:*:Enabled:W...
  • '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\svchost.exe" /t REG_SZ /d "%APPDATA%\svchost.e...
  • '%WINDIR%\syswow64\reg.exe' ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\svchost.exe" /t REG_SZ /d "%APPDATA%\svchost.exe:*:En...
  • '%WINDIR%\syswow64\reg.exe' ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%TEMP%\vbc.exe" /t REG_SZ /d "%TEMP%\vbc.exe:*:Enabled:Windows ...
  • '%WINDIR%\syswow64\reg.exe' ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f

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