How do we tell a real incident from a false alarm?
By checking the alert against what you know, quickly and in the same order every time. Ask four questions: is the device and its owner known, is there a business reason for this behaviour, is the destination or account familiar, and has anything else unusual happened on the same host or at the same time? A backup job, a software update or an administrator working late explain many alerts within a few minutes. Something nobody can explain, that touches several hosts or that follows another alert deserves escalation. Write down what you checked, even when it was harmless, so the next person does not start from zero. NetSenX explains on every alert which network features drove it, names the MITRE ATT&CK technique where one applies, and lets you mark a false positive, with the decision kept in the audit log.