Cybercrime investigation is the process of collecting, preserving, and analyzing digital evidence in a suspected online offense. It can involve logs, device images, account records, network traffic, cloud data, and other artifacts that help reconstruct what happened, when it happened, and who may have been involved.
In cyber security, this work matters because attacks often leave only partial traces. A good investigation can confirm an intrusion, measure impact, support containment, and provide evidence for law enforcement or legal action. In real incidents, investigators look for indicators such as unusual logins, malware traces, data exfiltration patterns, and changes to access permissions. Defenders also rely on investigation methods after an alert: they preserve evidence, maintain chain of custody, and build a timeline so they can respond without destroying proof. When done well, cybercrime investigation turns technical noise into evidence that can stand up in court.