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Profil

Win32.HLLW.Autoruner.51942

Added to the Dr.Web virus database: 2011-06-17

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '@' = '<DRIVERS>\USBInfo.com'
  • [<HKCU>\Control Panel\Desktop] 'SCRNSAVE.EXE' = '<SYSTEM32>\ScreenSave.scr'
Creates the following files on removable media:
  • <Drive name for removable media>:\autorun.inf
  • <Drive name for removable media>:\╬─╝■╝╨.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)
Creates and executes the following:
  • <DRIVERS>\USBInfo.com 
Executes the following:
  • <SYSTEM32>\attrib.exe +s +h "<Auxiliary name>"
  • <SYSTEM32>\attrib.exe +s +h "Program Files"
  • <SYSTEM32>\attrib.exe +s +h "Documents and Settings"
  • <SYSTEM32>\attrib.exe +s +h "Far"
  • <SYSTEM32>\attrib.exe +s +h "RECYCLER"
  • <SYSTEM32>\attrib.exe +a +r +s +h "recycler.exe"
  • <SYSTEM32>\attrib.exe +a +r +s +h "system volume informatio.exe"
  • <SYSTEM32>\attrib.exe +s +h "System Volume Information"
  • <SYSTEM32>\attrib.exe +s +h "WINDOWS"
  • <SYSTEM32>\wscript.exe "<DRIVERS>\USBInfo.vbe"
  • <SYSTEM32>\taskkill.exe /f /im usbmon.exe /im U┼╠▓б╢╛├т╥▀╞ў.exe /im USBCleaner.exe /im mmc.exe /im regedit.exe
  • <SYSTEM32>\attrib.exe -s -h <Full path to virus>
  • <SYSTEM32>\wscript.exe "<DRIVERS>\USBStor.vbe"
  • %WINDIR%\regedit.exe /s <DRIVERS>\USBInfo.reg
  • <SYSTEM32>\attrib.exe +a +r +s +h autorun.inf
  • <SYSTEM32>\attrib.exe +s +h "af32d3b0"
  • <SYSTEM32>\wscript.exe "<DRIVERS>\USBSys.vbe"
  • <SYSTEM32>\attrib.exe +a +r +s +h ╬─╝■╝╨.exe
Modifies settings of Windows Explorer:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoFolderOptions' = '00000001'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoRun' = '00000001'
Modifies file system :
Creates the following files:
  • C:\Far.exe
  • C:\<Auxiliary name>.exe
  • C:\Documents and Settings.exe
  • C:\desktop.ini
  • <Current directory>.exe
  • C:\System Volume Information.exe
  • %WINDIR%.exe
  • <Auxiliary element>
  • %PROGRAM_FILES%.exe
  • C:\RECYCLER.exe
  • C:\autorun.inf
  • <DRIVERS>\Driver.sys
  • <DRIVERS>\USBInfo.vbe
  • <DRIVERS>\USBStor.vbe
  • %TEMP%\~1.bat
  • <DRIVERS>\USBInfo.com
  • <DRIVERS>\USBSys.vbe
  • C:\╬─╝■╝╨.exe
  • <DRIVERS>\USBInfo.reg
  • %TEMP%\~2.bat
  • <SYSTEM32>\ScreenSave.scr
Sets the 'hidden' attribute to the following files:
  • C:\RECYCLER.exe
  • <Drive name for removable media>:\╬─╝■╝╨.exe
  • <Drive name for removable media>:\autorun.inf
  • C:\autorun.inf
  • %TEMP%\~1.bat
  • %TEMP%\~2.bat
  • C:\╬─╝■╝╨.exe
Deletes the following files:
  • C:\desktop.ini
  • %TEMP%\~1.bat
  • <DRIVERS>\Driver.sys
Miscellaneous:
Searches for the following windows:
  • ClassName: 'RegEdit_RegEdit' WindowName: ''
  • ClassName: '' WindowName: ''

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