SANS Holiday Hack Challenge 2020: CAN-BUS Investigation

Each year, the SANS and Counter Hack Challenges teams put together my favorite capture the flag (CTF) competition, the SANS Holiday Hack Challenge. The 2020 SANS Holiday Hack Challenge, featuring KringleCon 3: French Hens! was held at Santa’s newly renovated castle at the North Pole from December 10, 2020 to January 11, 2021. This is a walk-through for a terminal challenge from the event.

Wunorse Openslae introduced me to the CAN-Bus Investigation Terminal Challenge. To get started on this terminal challenge, I watched the conference…