Rahitor is a trojan downloader that downloads and installs a spying trojan named Agent.K on a computer from the virtumonde.com website. The trojan's file is downloaded into Windows directory and then activated. The downloader avoids downloading if the host's name contains 'mil' or 'gov' strings.
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.