X97M/Extras is a macro virus written in Visual Basic for Applications and is the first polymorphic macro virus to infect XLS files within Microsoft Excel v.8.0.
Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
Check for the latest database updates
First check if your F-Secure security program is using the latest updates, then try scanning the file again.
Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note: You need administrative rights to change the settings.
Extras changes its appearance so it looks different in every infected file.
The virus also creates an infected Excel spreadsheet within the Excel startup directory.
Extras activates on and after January 1st, 1999. At this time, the virus will try to remove all menus from Excel interface.
X97M/Extras has nothing to do with the WM/Extra Word macro virus.