Question : What you hear is not what you always hear. Channel your energy in finding the unknown.
Link : http://ctf.nullcon.net/data/2014/lev/misc/Level3.mp3
This was the easiest one.
Load the mp3 in audacity.We can easily notice that the effect was reversed.
Go to Effect->reverse now you can use the morse code if u have observed as soon as you have loaded the file.
This is the morse code extracted : ".. .-.. --- ...- . --. --- .- -.-.-- -. ..- .-.. .-.. -.-. --- -. ..--- ----- .---- ....- .. ... .- .-- . ... --- -- . -.-.-- -.-.--"
after decoding the morse code we get ILOVEGOA!NULLCON2014ISAWESOME!!
FLAG : ILOVEGOA!NULLCON2014ISAWESOME!!
Link : http://ctf.nullcon.net/data/2014/lev/misc/Level3.mp3
This was the easiest one.
Load the mp3 in audacity.We can easily notice that the effect was reversed.
Go to Effect->reverse now you can use the morse code if u have observed as soon as you have loaded the file.
after decoding the morse code we get ILOVEGOA!NULLCON2014ISAWESOME!!
FLAG : ILOVEGOA!NULLCON2014ISAWESOME!!
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enter valid comments.Suggestions are most welcome and would be interested in correcting my mistakes.