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Win32.HLLW.Autoruner1.23839

Added to the Dr.Web virus database: 2012-07-25

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Trojan Program' = '%WINDIR%\CSRSS.EXE'
  • [<HKLM>\SOFTWARE\Classes\HTTP\shell\open\command] '' = '"%PROGRAM_FILES%\common~1\IEXP1ORE.pif" -nohome'
  • [<HKLM>\SOFTWARE\Classes\winfiles\Shell\Open\Command] '' = '%WINDIR%\ROUTER.exe "%1" %*'
  • [<HKLM>\SOFTWARE\Clients\StartMenuInternet\IEXP1ORE.pif\shell\open\command] '' = '"%PROGRAM_FILES%\common~1\IEXP1ORE.pif"'
  • [<HKLM>\SOFTWARE\Classes\.exe] '' = 'winfiles'
  • [<HKLM>\SOFTWARE\Classes\ftp\shell\open\command] '' = '"%PROGRAM_FILES%\Internet Explorer\IEXP1ORE.com" %1'
  • [<HKLM>\SOFTWARE\Classes\InternetShortcut\shell\open\command] '' = 'rundll32.exe shdocvw.dll,OpenURL %l'
  • [<HKLM>\SOFTWARE\Classes\dunfile\shell\open\command] '' = '%SystemRoot%\system32\RUNDLL32.EXE NETSHELL.DLL,InvokeDunFile %1'
  • [<HKLM>\SOFTWARE\Classes\telnet\shell\open\command] '' = 'rundll32.exe url.dll,TelnetProtocolHandler %l'
  • [<HKLM>\SOFTWARE\Classes\Applications\iexplore.exe\shell\open\command] '' = '"%PROGRAM_FILES%\Internet Explorer\IEXP1ORE.com" %1'
  • [<HKLM>\SOFTWARE\Classes\htmlfile\shell\open\command] '' = '"%PROGRAM_FILES%\Internet Explorer\IEXP1ORE.com" -nohome'
Creates the following files on removable media:
  • <Drive name for removable media>:\autorun.inf
  • <Drive name for removable media>:\command.com
Malicious functions:
Creates and executes the following:
  • %WINDIR%\CSRSS.EXE
Modifies file system :
Creates the following files:
  • <SYSTEM32>\MSCONFIG.COM
  • %WINDIR%\ROUTER.exe
  • %WINDIR%\1.scr
  • <SYSTEM32>\dxdiag.com
  • %WINDIR%\Debug\DebugProgram.exe
  • <SYSTEM32>\regedit.com
  • %WINDIR%\explorer.scr
  • <SYSTEM32>\FILELOCATION.com
  • <SYSTEM32>\RUNDL132.com
  • %WINDIR%\CSRSS.EXE
  • %WINDIR%\FILELOCATION.com
  • %CommonProgramFiles%\IEXP1ORE.pif
  • %PROGRAM_FILES%\Internet Explorer\IEXP1ORE.com
  • <SYSTEM32>\command.scr
Sets the 'hidden' attribute to the following files:
  • <Drive name for removable media>:\command.com
  • %WINDIR%\ROUTER.exe
  • %WINDIR%\explorer.scr
  • <SYSTEM32>\regedit.com
  • <SYSTEM32>\dxdiag.com
  • <SYSTEM32>\MSCONFIG.COM
  • %CommonProgramFiles%\IEXP1ORE.pif
  • <SYSTEM32>\FILELOCATION.com
  • <SYSTEM32>\RUNDL132.com
  • %WINDIR%\CSRSS.EXE
  • %PROGRAM_FILES%\Internet Explorer\IEXP1ORE.com
  • %WINDIR%\FILELOCATION.com
  • <SYSTEM32>\command.scr
Miscellaneous:
Searches for the following windows:
  • ClassName: 'TFRMMAINMAIN' WindowName: '?????'
  • ClassName: 'TFRMMAIN' WindowName: '????'
  • ClassName: 'MS_WINHELP' WindowName: ''
  • ClassName: '' WindowName: 'ifyoudothatagainiwillkickyourass.mir'
  • ClassName: '' WindowName: '53589793238462643383279'