A simple overwriting virus, which may display the message "Divide overflow" when executed. Not very interesting.
Do not confuse the Yukon virus with the YUKON3U hoax.
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.