This virus adds a variable number of "garbage" bytes to any files it infects. The full effects of the virus have not been determined, but it contains the following text (encrypted).
The PHANTOM Was HERE - Sorry...HI ROOKIE! I'm a THESEASE! I live in YOUR computer - sorry... Thanks to Brains in the Computer Siences! Copyright (c PHANTOM -- This virus was designed in the HUNGARIAN VIRUS DEVELOPING LABORATORY. (H.V.D.L.)v1
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.