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Win32.HLLW.Autoruner2.12990

Added to the Dr.Web virus database: 2014-04-25

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'e5a9ed9865566182cd0d27ec63ce3828' = '%TEMP%\Microsoft\svchost.exe'
Creates or modifies the following files:
  • %HOMEPATH%\Start Menu\Programs\Startup\svchost.exe
Creates the following files on removable media:
  • <Drive name for removable media>:\Worm.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DoNotAllowExceptions' = '00000000'
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'EnableFirewall' = '00000000'
To complicate detection of its presence in the operating system,
forces the system hide from view:
  • hidden files
Executes the following:
  • '<SYSTEM32>\netsh.exe' firewall set opmode disable
Modifies file system :
Creates the following files:
  • %TEMP%\dw.log
  • %TEMP%\2AA4F.dmp
  • %TEMP%\Microsoft\svchost.exe
  • %TEMP%\BlackData.dat
Sets the 'hidden' attribute to the following files:
  • %TEMP%\BlackData.dat
  • <Drive name for removable media>:\Worm.exe
  • %TEMP%\Microsoft\svchost.exe
  • %HOMEPATH%\Start Menu\Programs\Startup\svchost.exe
Network activity:
Connects to:
  • 'localhost':1177
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Shell_TrayWnd' WindowName: '(null)'
  • ClassName: 'Indicator' WindowName: '(null)'