Targeted or random?
The left-hand quadrant shows the different types of adversaries. The attack may be targeted or completely random (horizontal axis) and casual or persistent (vertical axis). The most dangerous types of attack are Advanced Persistent Threats (APTs) in quadrant two. If an attacker is determined enough and prepared to invest substantial amounts of time and money, they are likely to succeed in the end. This type of adversary is typically state sponsored, looking to steal sensitive defence secrets or disrupt critical national infrastructure. Countries such as Iran, Russia, China and North Korea are reputedly active in this area. A more typical adversary would be a cyber criminal in quadrant one, randomly selecting targets based on unpatched system vulnerabilities or even an opportunistic amateur in quadrant four casually scanning the internet for victims.