I'm using an application (an instant messenger) which is not very popular. I'm trying to find the protocol that it uses. I know it's using TCP/IP but I want to find out all the commands that it is sending to the server and receiving from the server.
I tried a couple of sniffers, but they can not recognize this application by name and more over all I got was some unrelated hexadecimal codes.
Is there any idea how I can find the application's specifications?
(Please note: I googled it and found nothing and also there is no documentation by the author.)
There are generally two approaches to reverse engineering something like this:
You could try disassembling it with a tool like IDA PRO.
You could try sniffing its traffic with a tool like Wireshark
Either way, it's likely to be a LOT of work.
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