https://icypetal.github.io/icypetal's blog 2024-10-30T05:17:48+00:00 icypetal https://icypetal.github.io/ Jekyll © 2024 icypetal /assets/img/favicons/favicon.ico /assets/img/favicons/favicon-96x96.png 2024-10-28T00:00:00+00:00 2024-10-30T05:17:22+00:00 https://icypetal.github.io/posts/GreyCTF-2024-Finals/ icypetal

GreyCTF 2024 Finals blockchain writeups Intro GreyCTF was hosted by NUS Greyhats on 28 July 2024. I participated with team youtiaos, achieving 4th. I finally got to writing my writeups for the blockchain category. All challenges and solve scripts are available here Challenges Gnosis Unsafe In the setup contract, a safe is created with dead owners, and 10000 GREY tokens are minted to th...

2024-04-30T00:00:00+00:00 2024-10-23T15:31:33+00:00 https://icypetal.github.io/posts/GeekCTF-2024/ icypetal

GeekCTF min-trust challenge writeup Intro GeekCTF was a CTF held between 5th April to 14th April 2024. There was an interesting blockchain challenge which this writeup will be about. Challenge // SPDX-License-Identifier: UNLICENSED pragma solidity ^0.8.13; contract Challenge { mapping (address => uint256) public secret; bool public privileged; bool public isSolved; u...

2024-04-29T00:00:00+00:00 2024-10-23T15:31:33+00:00 https://icypetal.github.io/posts/cr3ctf/ icypetal

cr3 CTF blockchain writeups Intro cr3 CTF had 3 blockchain challenges, cr3dao, cr3dao_revenge and cr3proxy. I participated under fnksvb with team Big Beef Bois, solving cr3dao-revenge but unfortunately I did not solve cr3proxy in time. I will write a writeup for all 3 challenges nonetheless. Challenges cr3dao Two contracts are given, Cr3DAO and Cr3Token, which is an ERC20 token. The ...

2024-04-26T00:00:00+00:00 2024-10-23T15:31:33+00:00 https://icypetal.github.io/posts/GreyCTF-2024-Qualifiers/ icypetal

GreyCTF 2024 Qualifiers blockchain writeups Intro GreyCTF is hosted by NUS Greyhats. I participated with team youtiaos, achieving 1st in the local category. Having a sudden interest in blockchain, I exclusively looked into the blockchain category, solving 3/4 challenges. All challenges are available here Environment Setup Introduction This section is for beginners. Skip to Challenges...