Hantaner is a prepending virus. There exist packed and non-packed variants of Hantaner. The virus infects files in Kazaa P2P (peer-to-peer) client shared folder.
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.
Hantaner writes itself in front of executable files in that folder (prepending infection). When someone downloads and runs a file from an infected computer, he/she also becomes infected with the virus.
F-Secure Anti-Virus can detect and disinfect Hantaner virus with the following updates: