People use their phones every day but don’t really know how they work. GSM sniffing has been around for a long time but the problem is that no one really knows that its a huge security risk. Although many forms of encryption have now been implemented it is still possible to spoof Cell towers and do a “man in the middle attack”.
Here are some packets I have sniffed using my dongle .
For now we can just read the data from the cell tower but not what is going on between the phone and the cell tower. GSM uses 900mhz band (varies by carrier) and the dongle allows us to sniff that frequency but 3G/4G use 1800/2100mhz respectively which is outside out dongles range.
We have two choices either buy a dongle which can reach these frequencies or buy a down converter which will allow us to lower the higher frequencies to levels which our dongle can listen to .
Later on we will explore how to decrypt SMS packets and more !