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Win32.HLLW.Autoruner1.5523

Added to the Dr.Web virus database: 2011-12-07

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'lkthost' = '%WINDIR%\Sys\svchost.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'lkthost' = '<Full path to virus>'
Creates the following files on removable media:
  • <Drive name for removable media>:\Start.exe
  • <Drive name for removable media>:\autorun.inf
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
  • hidden files
Executes the following:
  • <SYSTEM32>\reg.exe ADD hkcu\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced /v ShowSuperHidden /t REG_DWORD /d 0 /f
  • <SYSTEM32>\reg.exe ADD hkcu\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced /v SuperHidden /t REG_DWORD /d 0 /f
  • <SYSTEM32>\attrib.exe +r +h +s E:\Start.exe
Modifies file system :
Creates the following files:
  • %WINDIR%\Sys\svchost.exe
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\htmlfacil[1]
Sets the 'hidden' attribute to the following files:
  • <Drive name for removable media>:\Start.exe
Network activity:
Connects to:
  • 'ht###acil.com':80
TCP:
HTTP GET requests:
  • ht###acil.com/?ad#############
UDP:
  • DNS ASK ht###acil.com
  • '<Private IP address>':1036