Ask HN: How do you find reliable info about a virus or malware?

Sorry in advance for the noobish question. How do you find reliable, detailed info about viruses or malware?

I run antivirus (BitDefender) and antimalware (Malwarebytes), and they occasionally come up with results for files I've downloaded, both new and old. Usually they are of the type Generic.Trojan.34567 or the like, and I tend to assume they are false positives but delete the files anyway. That said, a Google search for any virus name usually leads to thousands of shady links promising REMOVE GENERIC.TROJAN.34567 FAST DOWNLOAD HERE etc. etc.

There has got to be some sort of informational database about these threats, what they can do, maybe how to remove them... isn't there? What resources are out there to learn about known threats?