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Win32.HLLW.Rendoc.3

Added to the Dr.Web virus database: 2016-07-09

Virus description added:

Technical Information

To ensure autorun and distribution
Modifies the following registry keys
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'mls' = '"%APPDATA%\RAC\mls.exe" -s'
Creates the following files on removable media
  • %TEMP%\237384764.tmp
  • <Drive name for removable media>:\weeklysheet1215.exe
Modifies file system
Creates the following files
  • %TEMP%\27644748.tmp
  • %TEMP%\rcxa2ce.tmp
  • %TEMP%\rcxa35c.tmp
  • <PATH_SAMPLE>.xlsx
  • %TEMP%\237384764.tmp
  • %TEMP%\rcxb201.tmp
  • %TEMP%\rcxb250.tmp
  • %TEMP%\rcxb29f.tmp
  • %TEMP%\232154774.tmp
Sets the 'hidden' attribute to the following files
  • <PATH_SAMPLE>.xlsx
  • %TEMP%\237384764.tmp
Moves the following files
  • from %TEMP%\rcxa2ce.tmp to %TEMP%\27644748.tmp
  • from %TEMP%\rcxa35c.tmp to %TEMP%\27644748.tmp
  • from %TEMP%\27644748.tmp to %APPDATA%\rac\mls.exe
  • from %TEMP%\rcxb201.tmp to %TEMP%\237384764.tmp
  • from %TEMP%\rcxb250.tmp to %TEMP%\237384764.tmp
  • from %TEMP%\rcxb29f.tmp to %TEMP%\237384764.tmp
Network activity
UDP
  • DNS ASK wx###lytics.ru
Miscellaneous
Searches for the following windows
  • ClassName: 'XLMAIN' WindowName: 'Microsoft Excel (Product Activation Failed) - Book1'
  • ClassName: 'XLMAIN' WindowName: ''
Creates and executes the following
  • '%APPDATA%\rac\mls.exe' -s
  • '%ProgramFiles%\microsoft office\office14\excel.exe' /dde' (with hidden window)
  • '%APPDATA%\rac\mls.exe' -s' (with hidden window)
Executes the following
  • '%ProgramFiles%\microsoft office\office14\excel.exe' /dde
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