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Event ID 3: Network connection (Microsoft-Windows-Sysmon/Operational)

What this Event ID actually records on disk, the EventData fields worth reading first, and where it sits in a DFIR triage workflow.

Channel
Microsoft-Windows-Sysmon/Operational
Provider
Microsoft-Windows-Sysmon%4Operational
Triage notes
Per-connection record with source/dest IP, port, process. Watch for short-lived 443 to unknown hosts.

Microsoft Learn

https://learn.microsoft.com/en-us/sysinternals/downloads/sysmonOpen the official reference