Description: TONES & I's new song is taking over the world . Its so cool . Note: Please enclose the flag in pCTF{} format and in upper case only
In this challenge we're given an audio file named tones.wav. On listening to the file, we can notice that it's full of beeps and boops. Sounds like DTMF tones.
We can use a DTMF decoder to extract information from this audio file using this one command-
dtmf tones.wav
which gives us the following output-
These are inputs for one of those old keypads on phones like the older Nokia phones.
Let's split the inputs to make them more meaningful-
333-777-33-77-88-33-66-8-777-7-8-777-2-66-4-33-222-2-555-555-777-7
Referring to the keypad, the output for this would be- FREQUENTSTRANGECALLS
And that's the flag!
pCTF{FREQUENTSTRANGECALLS}