Hacking a X-RAY Machine with WHIDelite & EvilCrowRF

Recently I bought a X-RAY machine from China to have some ghetto-style desktop setup in order to inspect/reverse engineer some PCBs and hardware implants.

The first thing striked my curiosity, even before purchasing it, was its remote. Which were the odds that the little teeny-tiny remote was just using an ASK/OOK modulation with no replay-attack protection whatsoever?! Very high of course.

Nonetheless, I ordered it anyway and used it as an excuse to try again my WHIDelite and the new toy that Joel sent me over (EvilCrowRF).

But first let’s follow a more-systematic approach with HackRF and URH:

  • Frequency is confirmed being set around 315MHz
  • After recording a packet we can confirm that is using an ASK/OOK modulation.
  • After creating a simple substitution decoding, we get exactly the same values that both EvilCrowRF & WHIDelite showed during the initial tests.

☢ This crap is absolutely NOT secure! ☢

Just for the sake of confirmation, I did replay the packet with both HackRF, WHIDelite & EvilCrowRF. In all cases, the forged packet was successfully received and decoded by the unit, which fired X-RAYs like it was a Marie Curie’s party 🎉

Resources:

In case of more cool hacking stuff, do follow @whid_ninja on Twitter! 😎

P.S. Disclaimer, if you are planning to buy this model of Dental X-ray Machine… keep in mind that is NOT considered safe in Europe. The Health Protection Agency from UK, even released a report regarding these devices coming from China. Be prepared to use sheets of lead, dosimeters and protective vests.

Non aetate verum ingenio apiscitur sapientia / Omnia silendo ut audeam nosco / There is no deduction for excellence / Tweets are my own