A set of four semi-stealth viruses, not fully analyzed. In addition there are two shorter variants, 158 and 276 bytes, with no stealth-like abilities.
Depending on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the suspect file, or ask you for a desired action.
More information on the scanning and removal options available in your F-Secure product can be found in the Help Center.
You may also refer to the Knowledge Base on the F-Secure Community site for more information.