After this lesson, you will be able to: Understand why credentials are the most attacked asset, the difference between online and offline attacks, and the rule that you only attack credentials on systems you own or are authorized to test.
Credentials are the keys to the kingdom and the single most common way attackers get in. This subtrack covers brute force and dictionary attacks with Hydra, offline hash cracking, credential stuffing, and the defensive side: password managers, passkeys, and credential hygiene for both users and developers.
This is a free introductory lesson. No purchase required.
Most breaches start with a valid login, not an exploit. Attackers guess weak passwords, replay leaked ones, or crack stolen hashes. Verizon's annual breach reports consistently show stolen and weak credentials among the top causes. Defending credentials, and understanding how they are attacked, is foundational to every security role.
Run Hydra against a login form in a lab and see how fast a weak password falls. Understand why offline hash cracking is so much faster and more dangerous than online attacks. Explain credential stuffing and why password reuse causes it. On defense: recommend and use password managers and passkeys, and apply credential hygiene as a developer.