Do you want to learn how to hack Industrial Control Systems? Let’s participate in the one and only CTF in which you really have to capture a flag, by hacking PLCs and taking control of a robotic arm! We’ll start by explaining the basics of Industrial Control Systems : what are the components, how they work, the protocols they use… We’ll learn how PLC work, how to program them, and how to communicate with them using Modbus, S7comm and OPCUA. Then we’ll start hacking! Your goal will be to take control of a model train and robotic arms to capture a real flag! The CTF will be guided so that everyone learns something and gets a chance to get most flags!