Today’s security landscape is constantly changing. Attackers are becoming more sophisticated and nimble, leading to new threats and attacks evolving every day. Tailor-made, stealthy threats now routinely evade traditional, point-in-time security defences by using multiple attack vectors. Further, advanced attacks use whatever unprotected paths exist - often blending paths - to compromise targets. Cyber criminals continue to go to great lengths to remain undetected, using technologies and methods that result in nearly imperceptible Indications of Compromise (IoCs). At the same time, the attack surface is increasing because modern networks are evolving, extending beyond traditional walls to include public and private data centres, endpoints, virtual machines, mobile devices, and the cloud.