Carnival is a mass-mailer (worm) written in Visual Basic Script.
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 detection database 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.
Carnival.A arrives in a message that looks as follow:
Subject: Next Week: Brazilian Carnival Body: That's Great... Attachment: Brazilian_Carnival.JPG.vbs
The worm activates when a user click on the attached file. It spreads to all recipients written in Outlook address book.
On the top of its code this virus contains the following text:
followed by many commended lines.