I believe you are referring to:
Trojan:Win32/Wacatac.G!ml
It is known malware and it is being detected with Windows Defender and when it placed to Quarantine, they you are safe and good to go.
You may check history of Windows Defender and it will show location of malware but you wouldn't see information like remote connection and so on.
You may look into event viewer during the time when this malware detected and see if there is any log associated with this malware.