My-First-Steganography~Traboda Forensic Challenge Write up

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Challenge Description : We intercepted the transmission between russian spies, we got intel that they used something default to transmit message through images. Could you find it for us?

Flag Format : inctfj{…}

Challenge Link : https://app.traboda.com/challenge/90

Initially , we are given two images blueprint.jpg and blueprint0.jpg

blueprint.jpg

blueprint0.jpg

Since the title says steganography , I used a tool named steghide. Stegide tool can be used to embed and extract secret messages in images. It supports all the general formats of images like .png, .jpg etc.

steghide extract -sf blueprint.jpg

On Executing the above command , we are given a password.txt which contains a string ~ d4rk_s1d3.

By using d4rk_s1d3 as passphrase ,

steghide extract -sf blueprint0.jpg

The flag was found in plans.txt.

The flag is inctfj{w3_4r3_pl4nt1ng_4_b0mb}

Additional Installations

1. Steghide

sudo apt install steghide