Tags: baby stegnography forensics 

Rating: 3.0

Audio Salad | ஆடியோ சாலட்

Forensics | தடயவியல்

Source File : Audiosalad.wav

Question : My friend sent me this message via audio, but I dropped my salad on my computer before I could listen to it. Help!!!

First i had think , There is Audio Steganography. By doing the below things, I had got the message from Audio.

Step - 1 :

image

Step - 2 :

  • Open the AudioFile in Sonic-visualiser

image

Step - 3 :

  • Then add steg layer , which is persent in the layeropion image
  • Now got some meaning less number
  • The number is : 49 52 51 48 54 7b 31 33 6f ...

Step - 4 :

  • I guess this is Hexadecimal Number.Use Cipher chef image

  • So i can try to change Hexadecimal Number to Characters.

  • Happy to see Message [Flag : IRQHT{xxxxxxxxxxxxxxx}] But Not correct

  • Then Apply ceaser cipher to decrypt ROT12

    image

  • Final Flag : [UDCTF{13s....}]

நன்றி | வணக்கம்

Original writeup (https://github.com/Sriraj151/CTF_Writeups/tree/main/BlueHens_CTF_2022/Forensics/Audio%20Salad).