The attack surface is not only getting wider but also deeper: Wider as new attack vectors emerge, and deeper as threat actors find new ways to exploit traditional ones. With the growing use of LLMs and APIs, we can only expect this expansion to continue. That’s why the SOTI research team created something new for 2025: a practical, hands-on, highly technical defenders’ guide for those working on the front lines of the digital battlefield. Mapped to the security-in-depth framework, the Defenders’ Guide 2025 provides tactics and practices tested by defenders, researchers, data scientists, and threat hunters who, like you, face these challenges every day. You’ll learn how to: