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Win32.HLLW.Autoruner.51700

Added to the Dr.Web virus database: 2011-06-13

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'svchost' = '<SYSTEM32>\Lsas.exe'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'svchost' = '<Full path to virus>'
Creates the following files on removable media:
  • <Drive name for removable media>:\autorun.inf
  • <Drive name for removable media>:\Mirc.exe
Malicious functions:
Creates and executes the following:
  • <SYSTEM32>\Lsas.exe 
Executes the following:
  • <SYSTEM32>\cmd.exe /c C:\runner.bat
  • <SYSTEM32>\net1.exe stop sharedaccess
  • <SYSTEM32>\net.exe stop sharedaccess
Modifies file system :
Creates the following files:
  • %WINDIR%\Systemp.txt
  • C:\runner.bat
  • <SYSTEM32>\Lsas.exe
Deletes itself.
Network activity:
Connects to:
  • 'da####010.no-ip.org':2185
UDP:
  • DNS ASK da####010.no-ip.org
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: ''