We managed to intercept some transmission data. Can you find what they're upto?

Link: https://snazzysanoj.in/files/capture.zip

The challenge contains 5 stages,
Easy - 2
Medium - 1
Hard - 2

Flag format: flag{...}
There is only one final flag at the end.

You can contact me if you need any hints or solved the CTF.

Good luck :)