This is a simple resident COM-infector. It activates on the 8th of October and overwrites part of the hard drive with text 'Monika'.
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
More information on 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.