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Win32.HLLW.Autoruner1.63322

Added to the Dr.Web virus database: 2013-12-10

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Update' = '"%HOMEPATH%\Server.exe" ..'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Update' = '"%HOMEPATH%\Server.exe" ..'
Creates or modifies the following files:
  • %HOMEPATH%\Start Menu\Programs\Startup\Update.exe
Creates the following files on removable media:
  • <Drive name for removable media>:\autorun.inf.lnk
  • <Drive name for removable media>:\install.exe.lnk
  • <Drive name for removable media>:\install.exe
  • <Drive name for removable media>:\Update.exe
  • <Drive name for removable media>:\autorun.inf
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%HOMEPATH%\Server.exe' = '%HOMEPATH%\Server.exe:*:Enabled:Server.exe'
Creates and executes the following:
  • '%HOMEPATH%\Server.exe'
Executes the following:
  • '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%HOMEPATH%\Server.exe" "Server.exe" ENABLE
Modifies file system :
Creates the following files:
  • <SYSTEM32>\dllcache\myporn.scr
  • <SYSTEM32>\dllcache\doc.pif
  • <DRIVERS>\svchost.exe
  • <SYSTEM32>\dllcache\recycled.exe
  • %HOMEPATH%\Server.exe
  • C:\autorun.inf
  • C:\install.exe
Sets the 'hidden' attribute to the following files:
  • <Drive name for removable media>:\autorun.inf
  • <Drive name for removable media>:\install.exe
  • C:\install.exe
  • <Drive name for removable media>:\Update.exe
  • C:\autorun.inf
Network activity:
Connects to:
  • 'mu######ltamimi.no-ip.biz':666
UDP:
  • DNS ASK mu######ltamimi.no-ip.biz
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Shell_TrayWnd' WindowName: '(null)'
  • ClassName: 'Indicator' WindowName: '(null)'
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