An increasing number of organisations and individuals fall victim to cyber attacks, despite having set defence mechanisms. Most victims implement a rather traditional perimeter-based approach to cyber security, defending against known attacks with solutions like anti-virus and firewalls, increasingly ineffective against targeted attacks by persistent adversaries. The growing number of successful cyber attacks being launched every year is a clear indication that this model is not working effectively, and is not sustainable. Forward-looking organisations are adopting a new model, informed by threat intelligence and more inclusive of the complete chain of operations necessary to launch, and defend against, a cyber attack.