Cheese is a worm that is able to propagate from a Linux based system to another. It scans random Class B subnetworks for machines that are infected with a Lion worm, and if such systems are found, it copies itself to the victim to to directory "/tmp/.cheese".
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 the worm executes, it removes all lines that contain string "/bin/sh" from the "/etc/inetd.conf" and restarts inetd service. This effectively removes an open shell installed by Lion worm.
After that Cheese will start to scan for other machines to infect.