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Win32.HLLW.Autoruner1.8582

Added to the Dr.Web virus database: 2011-12-21

Virus description added:

Technical Information

To ensure autorun and distribution
Modifies the following registry keys
  • [<HKCU>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'local' = '%APPDATA%\co2.exe'
Malicious functions
To bypass firewall, removes or modifies the following registry keys
  • [<HKLM>\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DoNotAllowExceptions' = '00000000'
  • [<HKLM>\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%WINDIR%\Microsoft.NET\Framework\v2.0.50727\vbc.exe' = '%WINDIR%\M...
  • [<HKLM>\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\local2.exe' = '%APPDATA%\local2.exe:*:Enabled:Windows Me...
Injects code into
the following system processes:
  • %WINDIR%\microsoft.net\framework\v2.0.50727\vbc.exe
Modifies file system
Creates the following files
  • %APPDATA%\co2.exe
  • %APPDATA%\local2.exe
  • %APPDATA%\sex
Network activity
Connects to
  • 'ju#####cle.no-ip.org':3333
  • '2j#####ycle.no-ip.org':3333
UDP
  • DNS ASK ju#####cle.no-ip.org
  • DNS ASK 1j#####ycle.no-ip.org
  • DNS ASK 2j#####ycle.no-ip.org
  • DNS ASK 3j#####ycle.no-ip.org
Miscellaneous
Creates and 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' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%WINDIR%\Microsoft.NET\Framework\v2.0.50727\vbc.exe" /t ...' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\local2.exe" /t REG_SZ /d "%APPDATA%\local2.exe...' (with hidden window)
Executes the following
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\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
  • '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%WINDIR%\Microsoft.NET\Framework\v2.0.50727\vbc.exe" /t ...
  • '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\local2.exe" /t REG_SZ /d "%APPDATA%\local2.exe...
  • '%WINDIR%\syswow64\reg.exe' ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
  • '%WINDIR%\syswow64\reg.exe' ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%WINDIR%\Microsoft.NET\Framework\v2.0.50727\vbc.exe" /t REG_SZ ...
  • '%WINDIR%\syswow64\reg.exe' ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\local2.exe" /t REG_SZ /d "%APPDATA%\local2.exe:*:Enab...

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