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Win32.HLLW.Autoruner2.23279

Added to the Dr.Web virus database: 2016-03-02

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Active Setup\Installed Components\{622153A8-FE81-FE49-ECCC-FC561AC9CC6D}] 'StubPath' = '%APPDATA%\svchost.exe'
  • [<HKCU>\Software\Microsoft\Active Setup\Installed Components\{622153A8-FE81-FE49-ECCC-FC561AC9CC6D}] 'StubPath' = '%APPDATA%\svchost.exe'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'svchost' = '%APPDATA%\svchost.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run] 'svchost' = '%APPDATA%\svchost.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'svchost' = '%APPDATA%\svchost.exe'
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '<Full path to virus>' = '<Full path to virus>:*:Enabled:Windows Messan...
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\svchost.exe' = '%APPDATA%\svchost.exe:*:Enabled:Windows Mess...
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DoNotAllowExceptions' = '00000000'
Executes the following:
  • '<SYSTEM32>\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...
  • '<SYSTEM32>\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...
  • '<SYSTEM32>\reg.exe' ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "<Full path to virus>" /t REG_SZ /d "<Full path to virus>:*:Enab...
  • '<SYSTEM32>\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
  • '<SYSTEM32>\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "<Full path to virus>" /t REG_SZ /d "<Full path to virus>...
  • '<SYSTEM32>\reg.exe' ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
Modifies file system:
Creates the following files:
  • %APPDATA%\data.dat
  • %APPDATA%\svchost.exe
Network activity:
Connects to:
  • 'wo##.hopto.org':27050
UDP:
  • DNS ASK wo##.hopto.org
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: ''