As few seats are still available for next session of the Android training [1], we setup a crackme challenge for which you have to find the correct phone number that leads to the following message:

Application screenshot

The first correct answer will get a free ticket for the training.

The application can be run on an emulator or a real device (whatever the architecture) but the Android version must be at least Marshmallow (> 6.0).

If you encounter issues or if you have questions you can send an email to

Challenge - SHA256: d66b82ebc14708b214a581760e99894af17e10598bcef95e75441a12b948bbf0

Training description is available on the Quarkslab website


[1]It will take place in Paris on the week beginning January, 21st.

Results (12/12/2018)

Up to now we received 6 good answers. Here are the results:

  1. Peter Garba - 20/11/2018 - 5h49am

  2. Kao - 20/11/2018 - 8h57pm

  3. Christopher Thompson (Uber) - 20/11/2018 - 10h33pm

  4. Matteo Favaro (@Zimperium) - 21/11/2018 - 3h11pm

  5. @werewtk - 08/12/2018 - 2h05pm

  6. 0hax - 11/12/2018 - 2h32pm

If you would like to learn more about our security audits and explore how we can help you, get in touch with us!