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paola2020

unblocking a car with hackrf One and gnu radio companion does not work properly

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I'm new to SDR, I'm trying to perform a replay attack that consists of unlocking a blocked car with hackRF ONE and the software gnu radio companion but the problem is that when I record the unlock signal, then I run the replay attack, it locks the car if it is unlocked and does nothing if it is locked. I want to clarify that I used as a frequency of 433 Megahertz. I would have liked to share my flowgraph but my reputation does not allow me. If anyone had a similar problem or know the solution to my problem, please share with me. Thank you

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Just browsing and stumbled across this.

Newer cars use a rolling code that will not unlock for a replay attack. Is it possible your's is rolling?

The locking part is interesting. It might make sense to design the car security to always lock when encountering a replay.

Just speculation on my part.

Edited by DavesNotHere

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Yah I think this attack works on semi old cars. I read a artivle about Volkswagen using the same key FOB certificate on millions of cars. 

 

Try this attack on a vw... or bmw might also fit in the category.

 

If you have success. Post your results.

Edited by i8igmac

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See if this video from Samy Kamkar can help you out 

 

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