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Home Zypher 2023 Level 13 - NFT
Writeup
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Level 13 - NFT

Challenge

You have been given a file called image.nft

Hints

  1. Look at this hint

Solution

Download the file

Here Z0d1ac_1 seems to look like a username. Let’s google digital market for sea of art and see if something related to nfts comes up.

google

The first link itself comes up to be the biggest nft marketplace and we the link the word sea to opensea from previous hint. Lets lookup for Z0d1ac_1 username in opensea.

opensea

opensea

On the profile page of Z0d1ac_1 you can see the same nft as image.nft file, open the NFT

opensea

In the description it key is mastermind

When you look in the item activity section, you’ll find transfers between different entities of Z0d1ac but one suspicious account involved in all these transfers is RU55I4N_M45T3R

opensea

When you look for the RU55I4N_M45T3R username, you’ll find another NFT

opensea

opensea

In the description you can see the reward link

opensea

Go to https://www.dcode.fr/cipher-identifier and look for possible ciphers

opensea

Here we can see that highest probability is for ASCII Code

opensea

Flag

zyp{reward_6228}
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