It says a lot when there is no music

Flag: HACKDAY{Mast3r_0f_W4v(es)}

Challenge

25MB

it-says-a-lot-when-there-is-no-music.zip

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Description

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Yesterday, the police arrested a criminal for the murder of an inventor, a man who claimed to have designed a ""jetpack"" that would allow flight without a dirigible. During the interrogation, the criminal stated that he had been ordered to commit the act, before handing over a USB key containing a single file. This audio file seems deceptively simple, but who knows, it may hide a much more complex message.

Your mission : Uncover what lies behind this seemingly innocent sound !

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sha256: 5b775af025547a154689355dccd948626a42ad8d4b05641aae9307d45b87234d

Ce challenge tourne sur un docker et n'est pas disponible

Solution

Il faut utiliser la commande strings, la particularité est que c'est encodé sur 16bits et non 8. Il faut donc ajouter l'argument -e b.

┌──(thaysan㉿DESKTOP-PVE89Q3)-[~]
└─$ strings -e b suspicious_audio.wav

!"%(*+-134689;?ABEIJJMONOQSSTUUTTRQPMKKKIFGGEEECAAA@@BB@>>><:852/,++)%$&%
 %,//1699757=A>=BFEA?AB??CEEJLEDKKEFNRRRSVXXWY\_bdhmonrx{|
umcTC81)

[...]

"%$&'%"#)+*))&%&&&*.,'%(+,-032000--484034221,+0/*))'&()+-,*+-*',0.-.*'+,%$)*(-3/)-55330-00)(,,(')(&''##((
 !#&''*,***+/10144248:99::;>>>AFGDEIKHHLMKLPPMPTSRUVUW[YUW]_^_``a`^_a`_bdcba`aeebcecbdffggfdfhghhfgifdfhecdecabcccccdecced`^_``aba__aa^^``]\\[[^`_\[[\]]ZYZYYXVUSQQSTSSSQOOQRSSQNMKJJKLLKIIKKIHHHGFFFGGGGGGGFCAAA@A@?>==>><;<>??><;;<<<;;=><<==;<?>=<;:<=:8;>;:<;:<=:9<><::;>><<>=<=@AA@??BBACECAAA@ACB?@BA=<>@@???>>=;;<=>=<::988;<;;<;:9899887875565678864433566557755677677534676555433433455433211232100/./.-,-00-,++++++(&''&&%$##""!!!""!!
"A lot when there is no music". Here is your flag : HACKDAY{Mast3r_0f_W4v(es)}