What is threat intelligence?
Threat Intelligence (TI) is sometimes referred to as Cyber Threat Intelligence (CTI) to make it clear that the intelligence focuses on cybersecurity threats as opposed to other types of threats. The concept is ancient: the more you know about your enemies and how they plan and execute their attacks, the more prepared you can be for those attacks.
Simply put, CTI provides organizations with data and information on how attackers have been leveraging the Cybersecurity Usual Suspects, what they have been doing in IT environments post-initial compromise, and sometimes attribution for attacks to specific threat actors. Threats can also include various categories of malware, exploitation of vulnerabilities, web-based attacks, Distributed Denial of Service (DDoS) attacks, social engineering attacks, and others. Of course, as I wrote in Chapter 1, Introduction, there is also high interest in information about the attackers themselves – who they are, where they are located, whether they are state-sponsored or an independent criminal organization, and details on their modus operandi from their past attacks. An entire industry has grown around the demand for attribution and information on threat actors.