It will be not an answer, but just as some URLs (which probably should be known for you) -> because probably your ask about general and certain view (not only detection by F-Secure and not about all kind of malicious/harmful threats); Will be good if there comes better response from more experienced users or F-Secure team.
Where first link can be useful for some "large known" situations (and where possible to get additional resources, where possible to get statistics and information with your ask-meanings);
And second link as real-time count - which generally possible to use daily (maybe);
With other meanings (if there not required something from F-Secure; also because... probably... only F-Secure Team able to provide and create some proper advices) -> do you have any experience about popular known resources (?!) and it was not enough (since there maybe available some of them with potential nice view)?
As Ukko has mentioned, you can find the incidents calendar for 2017 and 2016 here. There is also a page for the recently published threat descriptions here.