Beyond the Signature: Machine Learning for Adaptive Cyber Threat Intelligence

Modern cyberattacks are increasingly dynamic, multi-stage, and difficult to recognize with static signatures alone. Machine learning (ML) provides a complementary approach by learning patterns from large volumes of security telemetry and identifying behavior that may indicate compromise. This paper presents an integrated framework for applying ML across the cyber threat intelligence lifecycle, from data ingestion and preprocessing to model training, deployment, continuous monitoring, and response. It discusses supervised classification and anomaly detection, together with specialized security functions such as web filtering, dynamic sandboxing, behavioral analysis, deceptive-domain detection, and email protection. The paper also emphasizes a human-in-the-loop model in which automated systems prioritize evidence while analysts validate important decisions. Finally, it considers data drift, concept drift, adversarial manipulation, privacy, and retraining. The proposed approach treats ML as one layer of a broader defense system, combining automated pattern recognition with threat context and human expertise to improve detection speed, reduce alert fatigue, and support adaptive cyber defense.