tqts.ar

Solving SherlockCTF

Fri, 25 Feb 2022 01:10:01 -0300

SherlockCTF was a collaborative CTF organized by Sherlock and Secureum, for the top 32 participants in february's RACE event. Each participant submitted a CTF level, and for 7 days, the competition was opened. I managed to score 32 points.

Solving DamnVulnerableDeFi - Part 1 - Levels 1 to 4

Sat, 01 Jan 2022 12:10:12 -0300

First part of the solutions/exploits for the Most Vulnerable DeFi (tm) out there.

Solving Ethernaut - Part 5 - Levels 21 to 25

Mon, 15 Nov 2021 17:11:01 -0300

Fifth (and last?) part of the solutions to Ethernaut. The challenges in this part are mostly vulnerabilities on more complex contracts, that mimic real exploits.

Solving Ethernaut - Part 4 - Levels 16 to 20

Mon, 15 Nov 2021 12:11:01 -0300

Fourth part of the solutions to Ethernaut. This time the challenges get harder and more interesting.

Solving Ethernaut - Part 3 - Levels 11 to 15

Mon, 15 Nov 2021 11:11:01 -0300

Third part of the solutions to Ethernaut. More fun levels, and a little bit harder than before.

Solving Ethernaut - Part 2 - Levels 6 to 10

Mon, 15 Nov 2021 07:11:01 -0300

Second part of the solutions to Ethernaut. Levels start to get progressively harder, and a lot more interesting to solve and learn.

Solving Ethernaut - Part 1 - Levels 0 to 5

Mon, 15 Nov 2021 07:10:01 -0300

Another Solidity and Ethereum security CTF game. This time we will be solving Ethernaut, the game hosted by OpenZeppelin.

Solving CaptureTheEther - Part 5 of 5 - Miscellaneous

Wed, 10 Nov 2021 02:14:25 -0300

This last category of challenges is a mix of various types of vulnerabilities that don't really fit into any of the other categories.

Solving CaptureTheEther - Part 4 of 5 - Accounts

Wed, 10 Nov 2021 02:14:24 -0300

These challenges are meant to teach about the fine details of EVM-compatible networks accounts, contract deployment and cryptographic key pairs.

Solving CaptureTheEther - Part 3 of 5 - Math

Wed, 10 Nov 2021 02:14:23 -0300

Third post for the CaptureTheEther CTF writeups. Now the focus is on mathematical functions.

Solving CaptureTheEther - Part 2 of 5 - Lotteries

Wed, 10 Nov 2021 02:14:22 -0300

This is the second post of a total of five, for the CaptureTheEther CTF writeups. This time, the focus will be on the Lotteries category of challenges. Most levels here will require the player to code and deploy new contracts to the network, and interact with them.

Solving CaptureTheEther - Part 1 of 5 - Warmup

Wed, 10 Nov 2021 02:14:21 -0300

This is the first post in a series about the Ethereum security introductory CTF "CaptureTheEther". There will be a total of five posts, each one of them focused in one of the categories of the game. For each level I'll describe the contract, the vulnerability, the solution I used and a conclusion about what to check when developing or auditing smart contracts.