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IoT Penetration Testing Cookbook by Aditya Gupta, Aaron Guzman

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RTL-SDR for GSM analysis

You can also use RTL-SDR for a number of other purposes. One such usage is performing cellular analysis, as shown next. We will be using the RTL-SDR to find the exact location details about various cellphone users. This can then be used with a unidirectional antenna to increase the range and collect a good amount of information.

  1. To do this, launch grgsm_livemon, which is downloadable from https://github.com/ptrkrysik/gr-gsm/. Launch it as shown in the following screenshot:
  1. This will open a screen of grgsm_livemon allowing you to change gain and frequency in order to look at the frequency spectrum:

So how do we ...

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