DEF CON 31
Biohacking Village
Talk: Making a Sick Badge
1:20PM PT on Friday 8/11
This year we created our first DEF CON badge, a bisected anatomical heart badge driven by real biometric input. We enjoyed almost every second of it. In this presentation we hope to enable other security professionals to tinker with badge development and give them tools and tricks to help facilitate their creativity. We think that understanding the process to create a working thing helps us all better understand where we can do things more securely and how to break things better. We will review the boring and unavoidable design questions that must be addressed, the exhilarating process of creating something that works well, and scaling up from a working prototype. We will demonstrate using real steps we took this year to make our badge for the Biohacking Village.
Click this GitHub link for our workshop repository.
Workshop: Bare Metal Firmware Development and Reverse Engineering
1:20PM PT on Sunday 8/13
Developing firmware is an essential skill that cyber security professionals should be familiar with to gain a deeper understanding of the foundation of most systems that are being relied on. Additionally, a fundamental understanding of firmware development is a valuable asset in the realm of firmware reverse engineering. This hands-on workshop aims to tackle both directions of firmware (development/reversing) to give the audience a better understanding of the intricacies with each process.
The firmware development portion of the workshop will walk the audience through a guided activity that performs the basic steps to deploy a firmware application on an embedded microcontroller (STM32). The application will be developed in such a way that it is intended to be reversed. The second half of the workshop deals with the firmware binary and the steps necessary to fully recover the firmware as much as possible.
An important note is that these tools and firmware will be open-source and therefore the audience can attempt this work on their own. Takeaways from this talk include an understanding of bare metal development environments, embedded C code, memory mapping and peripherals, as well as an intermediate understanding of Ghidra.
Click this GitHub link or our Bare Metal Firmware workshop repository.
