A97M/Walla infects MS Access databases. While infecting the virus replaces in databases the Autoexec script and copies to database additional form named "Walla Walla". Form contains macro with two subroutines:
Form_Load ChangeProperty
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.
When an infected database is opened, the startup form is activated. In infected databases it immediately calls subroutine "Load_Form" that contains main virus code. This subroutine searches for first five databases in the current directory and infects them. While searching the virus uses the "*.MDB" mask. Before infecting the virus changes several system parameters: disables viewing macros by using hot-keys and on error while executing macros, enables executing auto-scripts when Shift key is pressed (by default pressed Shift disables auto-scripts).
If day of month equals the month number, the virus shows two messages:
Walla Walla Walla Walla... You've gotten off easy so many times But I guess no one told you how to get a life
and
A97M/Walla Walla Walla Walla... The Song by The Offspring (c) 1998 The Virus by RUiNER '98 (c) 1998