Attack attribution is the process of linking malicious activity to a specific actor, group, or infrastructure. Security teams do this by comparing indicators such as malware code, command-and-control servers, tactics, victim selection, language, and reuse of tools or hashes. Attribution matters because it helps defenders understand motive, predict follow-on activity, and coordinate incident response, law enforcement, or intelligence sharing.
Attribution is rarely certain from a single clue. A ransom note, a hash, or a claimed victim name may be useful evidence, but it can also be incomplete, copied, or deliberately misleading. In real attacks, defenders treat attribution as a hypothesis that must be tested against logs, endpoint telemetry, network traffic, and historical patterns. Good attribution separates confirmed technical facts from unverified claims, which is essential when an extortion post names a target but provides little proof of compromise.