Awesome Blocksec CTFs

A curated list of blockchain security Capture the Flag (CTF) competitions

Online and self-hosted CTFs

• Damn Vulnerable DeFi
• Ethernaut
• Capture the Ether
• EtherHack
• Security Innovation Blockchain CTF
• HACON2020 CTF by RazzorSec
• Damn Vulnerable Crypto Wallet
• NCCGroup GOAT Casino
• Authio Solidity CTF:
  • Part 1 - Function Types
  • Part 2 - Safe Execution
  • Part 3 - HoneyPot
  • Part 4 - Read the Fine Print
  • Part 5 - Mirror Madness
• Cryptohunt by p4d
• Impossible by u/eththrowaway4

CTF Announcements and Writeups

• Paradigm CTF - 2021

• Damn Vulnerable DeFi - 2020

  • Damn Vulnerable DeFi Solutions by cmichel
  • Write-ups and lessons learned from Damn Vulnerable #DeFi by Damian Rusinek
  • Damn Vulnerable DeFi — Setup and Challenge #1 Walkthrough by iphelix
  • Damn Vulnerable DeFi — Challenge #2 Walkthrough by iphelix
  • Damn Vulnerable DeFi — Challenge #3 Walkthrough by iphelix
  • Damn Vulnerable DeFi — Challenge #4 Walkthrough by iphelix
  • Damn Vulnerable DeFi — Challenge #5 Walkthrough by iphelix
  • Damn Vulnerable DeFi — Challenge #6 Walkthrough by iphelix
  • Damn Vulnerable DeFi — Challenge #7 Walkthrough by iphelix

• Ethernaut

  • Ethernaut Solutions by cmichel - Challenges 0-21
  • Ethernaut Writeups by Macmod - Challenges 0-9
  • Ethernaut Solutions by tsauvajon - Challenges 1-11
  • Ethernaut Solutions by tinchoabbate
  • The Ethernaut CTF Writeup by Arseny Reutov - Challenges 0-6
  • Ethernaut Lvl 1 Walkthrough: how to abuse the Fallback function by Nicole Zhu

• Capture the Ether

  • Capture the Ether Solutions by cmichel

• 0xPOLAND - 2020

  • 0xPOLAND — Adventure Awaits by iphelix

• AnChain CTF - 2020

  • DeFi Detectives: Chef Nomi Investigation Notes by iphelix
  • DeFi Detectives: Discovering the Secrets of the DeFi Ecosystem
  • Congratulations Bitcoin Bounty Hunters! The World’s First Blockchain Investigation Contest.

• Donjon CTF - 2020

  • CTF 2020: Capture the Fortress
  • Ledger Donjon CTF: Rationale and Winners!

• Chain Heist - 2019

  • Chain Heist and blockchain security at DEF CON 2019
  • Chain Heist CTF Writeup by iphelix

• Capture the Coin - 2019

  • “Capture the Coin” at Defcon and you could win big
  • How the Coinbase Security team deployed CTFd to Power our First Capture the Flag contest at Defcon 27
  • Congratulations Capture the Coin participants!
  • Capture the Coin — Trivia Solutions
  • Capture the Coin — Blockchain Category Solutions
  • Capture the Coin — Cryptography Category Solutions

• ConsenSys Dilligence Ethereum Hacking Challenge - 2018

  • Consensys CTF Writeup by samczsun

• EtherHack - 2018

  • EtherHack Contest Writeup

• Authio Solidity CTF - 2018

  • Solidity CTF - Part 1: "Function Types
  • Solidity CTF — Part 2: “Safe Execution”by Alexander Wade
  • Solidity CTF — Part 3: “HoneyPot” by Alexander Wade
  • Solidity CTF — Part 4: Read the Fine Print by Alex Towle
  • Solidity CTF - Part 5: Mirror Madness by Paul Vienhage