I'm trying to decrypt some software (not a webpage or browser) that uses TSL 1.2. I'm using Wireshark to listen to packets flowing and I can see there's an TSL exchange at the start of the software, and then all the packets are encrypted. I would like to see what the server is responding to the POST requests the software makes. I have read about mitm attacks, but I'm not sure if its doable for what I want to accomplish, or how to proceed. The machine is mine, I don't have access to the software source code, nor to the server that servers the HTTP requests. I'm on Windows 8.1.