Worm:W32/Brontok is a large family of worms capable of spreading through various channels, such as emails, removable drives and so on.
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.
Brontok variants typically include a malicious payload, such as terminating processes, disabling programs or features of the operating system and attempting to connect to remote servers.
For representative examples of Brontok variants, see:
Some variants in the Brontok family can propagate over multiple vectors, i.e., they can spread via both infected email file attachments and infected removable drives.