If you want to see what’s being sent between your phone and SIM card, the Osmocom SIMtrace is the device for you (And yes it also uses Wireshark for viewing this data!).
While we’re working with Smart Card readers and SIM cards, capturing and Decoding USB traffic to see what APDUs are actually being sent can be super useful, so in this post we’ll look at how we can use Wireshark to sniff the USB traffic to view APDUs being sent to smart cards from other software.įor the purposes of this post I’ll be reading the SIM cards with pySim, but in reality it’ll work with any proprietary SIM software, allowing you to see what’s actually being said to the card by your computer. I never cease to be amazed as to what I can do with Wireshark.
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