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  3. X97M.Sufe


Risk Level 1: Very Low

January 10, 2001
February 13, 2007 12:46:51 PM
Systems Affected:
Macintosh, Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows XP

X97M.Sufe is a macro virus that infects Microsoft Excel spreadsheets. It replicates by exporting the entire viral module to a file named C:\Ms_io.sys, and then importing it to new spreadsheets. This macro virus has a payload that can be executed twice each month.

Antivirus Protection Dates

  • Initial Rapid Release version January 10, 2001
  • Latest Rapid Release version January 10, 2001
  • Initial Daily Certified version January 10, 2001
  • Latest Daily Certified version January 10, 2001
  • Initial Weekly Certified release date pending
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment


  • Wild Level: Low
  • Number of Infections: 0 - 49
  • Number of Sites: 3 - 9
  • Geographical Distribution: Low
  • Threat Containment: Easy
  • Removal: Easy


  • Damage Level: Low


  • Distribution Level: Low
Writeup By: Neal Hindocha

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