Black Hat Q&A: Hacking a 90s Sports Car

Security researcher Stanislas Lejay offers a preview of his upcoming Black Hat Europe talk on automotive engine computer management and hardware reverse engineering.

Communicating with your car and building your own tools is easier than you think, and well worth the effort, says Stanislas Lejay who will be briefing attendees in London at Black Hat Europe next month on
Unleashing the Power of My 20+ Years Old Car
. Its a fun and fascinating look at Lejays efforts to bypass the speed limiter (set at ~180 km/h) and still pass inspection.
Lejay opens up to Dark Reading about the process, what he learned, and what Black Hat attendees can look forward to in his Briefing.
Alex: Tell us a bit about how you got into cybersecurity, and what youre currently working on.
I went to a computer engineering school in France (EPITA) and followed the normal 5-year course. However, in the middle of my second year, a senior showed me a book called Hacking: The Art of Exploitation that I started reading just for fun. But as I was reading, I found it fascinating to try to think the other way around to break code, and make it do stuff it was never designed to do.
So I started learning reverse engineering and exploitation in my free time. (We didnt have any class related to that until the fourth year, if you choose the infosec specialization.) I started participating in a few capture the flag competions (CTFs), ROPing in my own code, and just trying to see how far I could go. I played with console hacking, emulation, firmwares, and eventually started working on cars.
A few years, projects and conferences later, I work as an automotive computer security engineer near Tokyo and fiddle with my own cars engine control units (ECUs) in my spare time.
Alex: What inspired you to pitch this talk for Black Hat Europe?
Stanislas Lejay:
This talk is a result of a real-life project I had going on, with a real purpose. I think that talking about a project with successes and failures, and a clear goal in sight, is the best way to actually get people interested in stuff they wouldnt bother learning about otherwise. People seemed to enjoy my last talk about car hacking, so while writing an article about it is nice, being able to show it to an audience and exchange thoughts on the subject afterward sounds even better.
Alex: Any fun anecdotes about fiddling with your cars in Japan?
Stanislas Lejay:
Well, so far it can still pass Shaken (the mandatory car inspection every two years) because my system doesnt modify the ECU and is basically just a bypass circuit that I can activate or not with a switch. So, in regard to the law, my car is still 100% stock but for a few additional wires and microcontrollers. All my cars are still road-legal, so far, as it is one of my main concerns when modifying them. So no, sorry, no fun anecdote on that side!
Alex: What do you hope Black Hat attendees will get out of seeing your talk?
Stanislas Lejay:
While this talk doesnt expose anything new, even less knowing that the car is 20 years old, it should still let people get an idea of how fun it is to play with cars, what you can do with them, and that most aftermarket tools you can buy for pretty high prices are not witchcraft. Communicating with your car and building your own tools for it is actually not that hard and can help you get a lot of insights, for cheap, on whats going on in your car when you actually drive it.
Get more information on
Lejay’s Briefing
and lots of other cutting-edge content in the
Briefings schedule
for Black Hat Europe, which returns to The Excel in London December 2-5, 2019. For more information on what’s happening at the event and how to register, check out the
Black Hat website

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Black Hat Q&A: Hacking a 90s Sports Car