Dapps (decentralized applications) are a type of application in the blockchain space that integrate both Web2 and blockchain components, presenting unique security challenges. Drawing from years of experience hacking Dapps, this session will share real-world examples of Dapp vulnerabilities and attack vectors. Topics covered include an introduction to Dapps, Dapp threat modeling, and Dapp vulnerability case studies, providing valuable insights and resources for newcomers and seasoned Web2 pentesters looking to enhance their Web3 application hacking skills.