Choir Echoes

Category: [Forensics]
Author: [ace6002]
Level: [Medium]

Challenge Description

Audio Forensics.

Question to be given

You could not live with your own failures. Where did that bring you? Back to the beginning. Wear your spectacles better, perhaps you'll succeed this time.

Solution

Tools Used

[Audacity]
[Hexedit]

Step 1: Hexedit given .wav file, correct the headers from KaFX to RIFF and WAWW to WAVE.

Step 2: Read the file using audacity spectrography to find the key. But this is not the flag, its simply the key of a Vigenere Cipher.

Step 3: The tail of the file `excellente!.wav` contains the encoded text `TCE{1rrp1ml0}` .

Step 4: Decode Vigenere using key `remy` obtained from spectral view to get flag `CYS{1tal1an0}`.

Flag 1

CYS{1tal1an0}

Flag

CYS{1tal1an0}

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Choir Echoes

Choir Echoes

Challenge Description

Question to be given

Solution

Tools Used

Step 1: Hexedit given .wav file, correct the headers from KaFX to RIFF and WAWW to WAVE.

Step 2: Read the file using audacity spectrography to find the key. But this is not the flag, its simply the key of a Vigenere Cipher.

Step 3: The tail of the file excellente!.wav contains the encoded text TCE{1rrp1ml0} .

Step 4: Decode Vigenere using key remy obtained from spectral view to get flag CYS{1tal1an0}.

Flag 1

Flag

Step 3: The tail of the file `excellente!.wav` contains the encoded text `TCE{1rrp1ml0}` .

Step 4: Decode Vigenere using key `remy` obtained from spectral view to get flag `CYS{1tal1an0}`.