Threat intelligence attribution is the practice of linking malicious activity to a tracked threat actor, group, or campaign using technical clues, infrastructure patterns, malware behavior, language, timing, and operational tradecraft. It is a security judgment, not courtroom proof.
This matters because attribution helps defenders cluster incidents, prioritize threats, and anticipate follow-on activity. In reports, it may appear as a label such as a named group or an alias, even when analysts cannot prove who was physically behind the attack. Attribution can also change as new evidence appears, so teams should treat it as a working assessment. Defenders use it to correlate logs, hunt for known tactics, and harden controls against recurring methods, while avoiding overconfidence in a single source or indicator.