There are several ways to go about this, but the easiest, in my opinion, is to use Audacity.
- I say this because messages hidden within audio can often be revealed with Audacity. It’s good to have it ready!
On Kali, install audacity
sudo apt install audacity
Open morse.wav and it will look like this:
Use a morse code tool online, enter the dots and dashes, and you’ll have the flag!