Cyber adversaries are targeting your enterprise every day. Defending/repelling these attacks is becoming less and less feasible; the adversaries are numerous and belligerent. This talk will explore what can be learned from the adversary's tactics, techniques, and procedures to leverage intelligence about the adversary and their techniques to strengthen your defensive posture. This talk will further explore a system for categorization in order to monitor and track advanced adversaries engaging in sustained attempts to access the enterprise. The key elements for collecting intelligence in today's complex environment and the legal challenges surrounding these measures will be discussed. Finally we will explore how to leverage this intelligence to further your proactive security program in terms of user awareness, security testing, training, and defensive strategy.