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Win32.HLLW.Autoruner.55143

Added to the Dr.Web virus database: 2011-07-27

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'MSWUpdate' = '"%APPDATA%\svchost.exe"'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'MSWUpdate' = '"%APPDATA%\svchost.exe"'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe "%APPDATA%\svchost.exe"'
Creates the following files on removable media:
  • <Drive name for removable media>:\Autorun.inf
  • <Drive name for removable media>:\SYSTEM.EXE
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\svchost.exe' = '%APPDATA%\svchost.exe:*:Enabled:CityScape'
Creates and executes the following:
  • %APPDATA%\svchost.exe /d <Full path to virus> 
Executes the following:
  • <SYSTEM32>\netsh.exe firewall add allowedprogram "%APPDATA%\svchost.exe" CityScape Enable
Modifies file system :
Creates the following files:
  • %APPDATA%\svchost.exe
  • %APPDATA%\ALwddDwJ
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\69I9OPW5\locate_my_ip[1]
Sets the 'hidden' attribute to the following files:
  • <Drive name for removable media>:\Autorun.inf
  • <Drive name for removable media>:\SYSTEM.EXE
  • %APPDATA%\svchost.exe
Deletes the following files:
  • %APPDATA%\ALwddDwJ
Deletes itself.
Network activity:
Connects to:
  • 'is######unzxbl.no-ip.biz':3177
  • 'www.ma##ind.com':80
  • 'localhost':1035
TCP:
HTTP GET requests:
  • www.ma##ind.com/app/locate_my_ip
UDP:
  • DNS ASK is######unzxbl.no-ip.biz
  • DNS ASK www.ma##ind.com
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: ''
  • ClassName: '' WindowName: 'HB'