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Win32.HLLW.Autoruner1.35391

Added to the Dr.Web virus database: 2013-04-20

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\Run] 'File Service' = '"<SYSTEM32>\$sysvit64$\sysvit64.exe"'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce] 'KIKW' = 'wscript /B /E:vbscript <SYSTEM32>\zbhvnby.cun /File Service'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\Run] 'Microsoft® Windows® Operating System' = '"<SYSTEM32>\$prefetch$\serivces.exe"'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Microsoft® Windows® Operating System' = '"<SYSTEM32>\$prefetch$\serivces.exe"'
Creates the following files on removable media:
  • <Drive name for removable media>:\autorun.inf
  • <Drive name for removable media>:\ytvr.rgi
Malicious functions:
Creates and executes the following:
  • '<SYSTEM32>\$prefetch$\serivces.exe'
  • '<SYSTEM32>\$sysvit64$\sysvit64.exe'
Executes the following:
  • '<SYSTEM32>\attrib.exe' +H "E:\ytvr.rgi"
  • '<SYSTEM32>\attrib.exe' +H "E:\autorun.inf"
  • '<SYSTEM32>\attrib.exe' +H "Z:\autorun.inf"
  • '<SYSTEM32>\attrib.exe' -H "<SYSTEM32>\$sysvit64$\sysvit64.tmp"
  • '<SYSTEM32>\attrib.exe' +H "Z:\rwxe.ibl"
  • '<SYSTEM32>\attrib.exe' +H "<SYSTEM32>\$sysvit64$\sysvit64.ocx"
  • '<SYSTEM32>\attrib.exe' +H "<SYSTEM32>\$prefetch$\serivces.exe"
  • '<SYSTEM32>\attrib.exe' -H "<SYSTEM32>\$prefetch$\serivces.exe"
  • '<SYSTEM32>\attrib.exe' -H "<SYSTEM32>\$sysvit64$\sysvit64.exe"
  • '<SYSTEM32>\attrib.exe' +H "<SYSTEM32>\$sysvit64$\sysvit64.exe"
  • '<SYSTEM32>\attrib.exe' -H "<SYSTEM32>\$sysvit64$\sysvit64.ocx"
Modifies file system :
Creates the following files:
  • <SYSTEM32>\$prefetch$\serivces.dll
  • <SYSTEM32>\zbhvnby.cun
  • <SYSTEM32>\$sysvit64$\sysvit64.tmp
  • <SYSTEM32>\$prefetch$\serivces.exe
  • <SYSTEM32>\$sysvit64$\sysvit64.exe
  • <SYSTEM32>\$sysvit64$\sysvit64.ocx
Sets the 'hidden' attribute to the following files:
  • <Drive name for removable media>:\autorun.inf
  • <Drive name for removable media>:\ytvr.rgi
  • <SYSTEM32>\$sysvit64$\sysvit64.ocx
  • <SYSTEM32>\$prefetch$\serivces.exe
  • <SYSTEM32>\$sysvit64$\sysvit64.exe
Deletes the following files:
  • <SYSTEM32>\$sysvit64$\sysvit64.tmp
Modifies the HOSTS file.