Explore the power of Java Agents in modifying bytecode at runtime to enhance application security. Learn how Java Agents work, both when configured at startup and when attached to a running process. Discover the underlying Java Agent API and its applications in analyzing and modifying applications. Follow along with a practical example of bytecode modification to protect against Log4J and other vulnerabilities. Gain insights into dynamic and static agent attachment, Runtime Application Self-Protection (RASP), Log4J interpolation, JNDI, and the potential threats posed by malicious JNDI servers. Watch a live demonstration of patching Log4J at runtime and see a vulnerability demo in action. This conference talk provides valuable resources, code examples, and recommended books for Java developers interested in enhancing their understanding of application security and bytecode manipulation.