A simple virus of no particular interest. It is not able to infect programs smaller than itself, and will destroy them.
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.
Variant:Gergana-222, Gergana-300, Gergana-450
Improved variants, with some bugs fixed, better error handling and improved in other ways. They all contain the text "Gergana", and in the original source code this particular line contains the comment
Happy 18th Birthday
This variant is slightly different. It may infect multiple files in the current directory, instead of just one, but may also disinfect the previously infected files.