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Profil

Win32.HLLW.Autoruner1.64510

Added to the Dr.Web virus database: 2013-12-24

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Sys-Boot' = '%WINDIR%\Win-boot.EXE'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Sys32-w32' = '<SYSTEM32>\Booter.EXE'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe Win-boot.EXE'
Creates or modifies the following files:
  • %WINDIR%\Tasks\At1.job
Creates the following files on removable media:
  • <Drive name for removable media>:\Autorun.inf
  • <Drive name for removable media>:\Ntldr.EXE
  • <Drive name for removable media>:\Documents %USERNAME%.exe
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
  • hidden files
  • file extensions
blocks execution of the following system utilities:
  • Windows Task Manager (Taskmgr)
  • Registry Editor (RegEdit)
blocks the following features:
  • System Restore (SR)
Creates and executes the following:
  • '%ALLUSERSPROFILE%\Application Data\Win-Fixed.exe'
  • '%ALLUSERSPROFILE%\Application Data\Win-Fixed.exe' (downloaded from the Internet)
Executes the following:
  • '<SYSTEM32>\at.exe' 12:00 /interactive /EVERY:m,t,w,th,f,s,su <SYSTEM32>\Booter.EXE
  • '<SYSTEM32>\at.exe' /delete /yes
Terminates or attempts to terminate
the following system processes:
  • <SYSTEM32>\cmd.exe
Modifies settings of Windows Explorer:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoRun' = '00000001'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoFind' = '00000001'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer] 'NoFolderOptions' = '00000001'
Forces autoplay for removable media.
Modifies file system :
Creates the following files:
  • C:\Autorun.inf
  • <SYSTEM32>\Booter.EXE
  • %ALLUSERSPROFILE%\Application Data\Win-Fixed.exe
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\U98D4X8H\regedit[1].jpg
  • %WINDIR%\Win-boot.EXE
  • %TEMP%\grnsgbc
  • %TEMP%\aut1.tmp
  • %ALLUSERSPROFILE%\Application Data\Exe_Debuger.ini
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\Exe_Debuger[1].ini
Sets the 'hidden' attribute to the following files:
  • C:\Autorun.inf
  • %ALLUSERSPROFILE%\Application Data\Win-Fixed.exe
  • <Drive name for removable media>:\Autorun.inf
  • C:\Ntldr.EXE
  • %WINDIR%\Win-boot.EXE
  • <SYSTEM32>\Booter.EXE
Deletes the following files:
  • <Drive name for removable media>:\Autorun.inf
  • %TEMP%\grnsgbc
  • %TEMP%\aut1.tmp
Network activity:
Connects to:
  • 'h1.##pway.com':80
TCP:
HTTP GET requests:
  • h1.##pway.com/up/apps/regedit.jpg
  • h1.##pway.com/up/apps/Exe_Debuger.ini
UDP:
  • DNS ASK h1.##pway.com
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: '(null)'