Threat description


Category: Malware
Type: Virus
Platform: X97M


X97M/Friend is a Excel 97 class infector.


Automatic action

Depending on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the suspect file, or ask you for a desired action.

More scanning & removal options

More information on the scanning and removal options available in your F-Secure product can be found in the Help Center.

You may also refer to the Knowledge Base on the F-Secure Community site for more information.

Contact Support

F-Secure customers can request support online via the Request support or the Chat forms on our Home - Global site.

Technical Details


When an infected workbook is opened, X97M/Friend.A disables Excel's built-in macro virus protection. Then it creates a workbook into Excel's startup directory, "sys.xls", and infects it. During infection the virus creates a temporary file, "C:\office.sys".

After that has been done and the Excel has been restarted, every workbook that is closed will be infected.


X97M/Friend.B is a slightly modified variant from X97M/Friend.A.

Technical Details: Sami Rautiainen, F-Secure


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