Summary
X97M/Anis is a simple Excel macro virus.
Removal
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.
Technical Details
Variant:Anis.A
When an infected workbook is opened, X97M/Anis.A creates "AutoRun.xla" into Excel's startup directory and infects it.
The virus infects all workbooks that are opened, closed or saved.
It attempts to disable items from the "Tools" menu and attempts to hook items in the "File" menu.
Anis has two different payloads. When saving a workbook or exiting the program it checks if the current day is 5th, 10th, 15th, 20th, 25th or 30th, and if so, it shuts down Windows. The virus also displays a message on 26th of every month, written in Japanese. Therefore message is not readable on versions of Excel that do not support doublebyte characters, such as the the English version.
Variant:Anis.C
This variant does not infect workbooks when an infected workbook is opened. Otherwise it is identical to X97M/Anis.A.
Variant:Anis.D
Anis.D variant is slightly modified Anis.C. Functionally it is similar to Anis.C
F-Secure Anti-Virus detects Anis.C since June 14th, 2002 and Anis.D since August 5th, 2002.
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