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George Hunter Profile
George Hunter

@GeorgeHNTR

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Your long-term smart contract security partner | Founder of @HunterBlockSec

Joined November 2022
Don't wanna be here? Send us removal request.
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@GeorgeHNTR
George Hunter
6 months
Do your smart contract protocol a favour and get a security audit by an all-star team of some of the industry's best talent:
@HunterBlockSec
Hunter Security
6 months
Winning 1st place in the @eBTCprotocol competition at @code4rena last year with the only critical vulnerability found, and now winning their @immunefi boost... That's one web3 security beast! It's an honor to have Stormy as an Associate Auditor on the Hunter Security team. 🫡
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@GeorgeHNTR
George Hunter
11 months
Just 1 year ago I was working as a Blockchain Engineer in a Bulgarian startup for less than $700/month. I have now made just over $70,000 in the month of October alone providing smart contract security services to protocols. Trust the process. ✌️
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@GeorgeHNTR
George Hunter
2 years
Top 10 Smart Contract Security Learning Resources 🚀 I went through all of the resources listed below in the beginning of my smart contract security journey 👨🏻‍💻 I’d appreciate a retweet, spread the knowledge 🫡 Now follow the thread 🧵 👇
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@GeorgeHNTR
George Hunter
1 year
2 years ago I was writing Solidity smart contracts on a sheet of paper during classes in high school. Now I'm securing multi-million dollar DeFi protocols. It's been a great journey.
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@GeorgeHNTR
George Hunter
10 months
I now know multiple 17-18-19 years old bulgarian smart contract security researchers with <1 year of experience making $30,000-70,000 a month from audit contests, private engagements and bug bounties. This space is just insane. 💰
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@GeorgeHNTR
George Hunter
1 year
"This part of my life, this little part, is called happiness." - Chris Gardner
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@GeorgeHNTR
George Hunter
2 years
1/ Signature Malleability 📝 А thread explaining what the Signature Malleability vulnerability is in smart contracts 🧵 I’d appreciate a retweet, spread the knowledge 🫡 Also, I'll post part 2 explaining a second type of Signature Malleability, so turn on the notifications 🛎️
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@GeorgeHNTR
George Hunter
1 year
Personal smart contract auditing stats for April: - 7 private audits (5 team, 2 solo) - 1 bug bounty reward - 20+ critical & high severity issues found - $31000+ earned in total It was a really productive month, looking forward to securing more Web3 protocols 🫡
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@GeorgeHNTR
George Hunter
2 years
For the past few months, I've been considering diving all-in into web3 security. I am now excited to announce that I have taken that leap! 🎉 Today is my last day as a blockchain engineer for the best company of its kind in my country.👇 Now I will have much more time to devote
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@GeorgeHNTR
George Hunter
1 year
That feeling when your PoC is finally ready and you've discovered that the impact of the vulnerability is even bigger than you originally thought it was 😊
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@GeorgeHNTR
George Hunter
2 years
My first bug bounty submission 👀
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@GeorgeHNTR
George Hunter
1 year
Lets gooo
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@GeorgeHNTR
George Hunter
2 years
Writing smart contracts in Solidity during the day as a Blockchain Engineer Finding vulnerabilities in smart contracts throughout the night as a Security Researcher And I get paid for both I fucking love this 😈
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@GeorgeHNTR
George Hunter
1 year
Today I turn 19 years old. 🥳 So, it's time to set some goals for my last teen year: - Build a robust portfolio of solo audits - 40+ happy and safe clients 😊 - Responsibly disclose a 7-figure critical vulnerability 🫡 - Have at least two months with a net income of $100k+ 💰
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@GeorgeHNTR
George Hunter
1 year
Yooo @DevDacian amazed me with this message 🤯 Absolutely insane - from reading my first audit report to finding a similar critical vulnerability in a live 7-figure smart contract and receiving a solid bounty for it, very impressive 🫡
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@GeorgeHNTR
George Hunter
2 years
I've had several opportunities over the past few months to take a full-time job as a smart contract auditor in the $100-200k range, but I've turned them all down. Being an independent security researcher is the good life and I will never go back to the 9-5 employee lifestyle 😊
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@GeorgeHNTR
George Hunter
2 years
I applied to @SpearbitDAO this week and had to write about my experience. I didn't realize how much knowledge and skills I've gained in just the last 6-12 months. I hope it's good enough to move on to the next stage of the interview process 🙏
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@GeorgeHNTR
George Hunter
2 years
You see a critical bug in an audit contest that can screw up the entire protocol ✅ 5 other dudes saw it, so you get only $100 😢 You see that a function uses <= instead of <, resulting in 1 wei per week getting locked 🤔 No one else saw this, so you get $10000 ✅
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@GeorgeHNTR
George Hunter
1 year
Solidity Alpha: When casting the result of any arithmetic operation like: int256 diff = int256(currPrice - lastPrice); The result is first stored in the larger type of the 2 variables and only then casted. This can lead to a critical vulnerability that may easily be missed. 👇
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@GeorgeHNTR
George Hunter
2 years
I found a critical vulnerability in an open-source smart contract protocol. I contacted the devs on twitter and offered them a private audit report. I reported the critical bug as well as 3 mediums and 8 lows. I got paid 3k$ and the issue was fixed. Everyone is happy 😊
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@GeorgeHNTR
George Hunter
1 year
Huge thanks to @0xMackenzieM and the @immunefi team for their support during the mediation process for my first bug bounty 🙏 I'm definitely going to start spending more time bug hunting on Immunefi soon 🫡
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@GeorgeHNTR
George Hunter
2 years
1/ Want to know what are the resources that gave me the best preparation possible to become a full-time Blockchain Engineer within 6 months as a 17-year-old boy? 🚀 A thread full of free resources for blockchain developers 📚 I’d appreciate a retweet, spread the knowledge 🫡
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@GeorgeHNTR
George Hunter
2 years
I put 40 hours a week into studying, researching and reporting smart contract vulnerabilities aside of my full-time job as a smart contract engineer This is a total of 10-12 hours a day, 7 days a week That's how I'm progressing so fast in the auditing space 🕵️‍♂️
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@GeorgeHNTR
George Hunter
10 months
2023 recap: - 17 solo security reviews - 26 team security reviews - 1 critical bug bounty - a high 9-figure TVL protocol client - about $350,000 earned 2024 goals: 1. crush @immunefi bug bounties 2. 1. ^
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@GeorgeHNTR
George Hunter
1 year
While some projects avoid paying for vulnerabilities, others are generous and build strong relationships with smart contract security experts. I recently received my first tip for a smart contract audit and I can't express how good it feels to see your work being so appreciated.
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@GeorgeHNTR
George Hunter
11 months
Do you regularly get "Hey sir how can I start my journey" DMs? 🥱 If you're looking for some general response, here it is: 1. @PatrickAlphaC 's Foundry course. 2. @ProgrammerSmart 's 0.8 playlist. 3. @0xOwenThurm 's Advanced Web3 Security course. 4. Crush @code4rena contests.
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@GeorgeHNTR
George Hunter
10 months
Did you know that all versions of OpenZeppelin from 2.0.0 to 4.9.2 contain at least 1 security vulnerability? 3.4.0 alone contains 14 known and later mitigated security vulnerabilities. Here's a list you can use to easily check if your code is affected.
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@GeorgeHNTR
George Hunter
4 months
Only in the Web3 Security space you can regularly see teenagers going from $0 to $10k a month in <6 months and from $10k to $100k a month in <12 more months. This space truly rewards those who put extraordinary effort into becoming the best and getting an edge in the market.
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@GeorgeHNTR
George Hunter
10 months
5+ years old smart contract attack vector yet still being missed by most security researchers in 2023. 🤔 An insightful blog post describing what block stuffing is. 👇 1/2 🧵
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@GeorgeHNTR
George Hunter
4 months
If someone finds a critical vulnerability in the Euler EVC code after all these audits, they will be remembered for a long time.
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@GeorgeHNTR
George Hunter
1 year
April's my 1st month auditing full-time and I'm really glad with my progress so far: - joined @0xPaladinSec - passed the @SpearbitDAO test - received my 1st bug bounty - performed several solo audits and scheduled more - found multiple critical vulnerabilities in 7+ figure
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@GeorgeHNTR
George Hunter
2 years
First @code4rena audit contest for 2023 - my first 4-digit reward and for the first time I'm in the Top 5 wardens 🚀💰 Reported 2 Highs, 2 Mediums and 1 Low severity issues of which one medium was even selected for the final report 🙏🏻
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@GeorgeHNTR
George Hunter
1 year
I couldn't agree more with their reasoning.
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@GeorgeHNTR
George Hunter
1 year
Receiving $26,000 and having just 1 dup for one of the most well-known vulnerabilities is impressive, but in a weird way. Is competition really that low on contests right now?
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@GeorgeHNTR
George Hunter
1 year
Auditor: Your admin can steal funds from users. Devs: Yes, we know that, it's normal, every protocol has an admin who can set critical parameters. ... The mitigation is a simple `if` check in a setter function, wdym it's normal to leave it? This is the current state of DeFi.
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@GeorgeHNTR
George Hunter
10 months
Last night I remembered that a recent solo audit client of mine was implementing a pattern similar to the one causing the critical vulnerability disclosed by the OpenZeppelin team: I immediately jumped to double-check the code (even tho it was past 2am
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@GeorgeHNTR
George Hunter
1 year
Are you looking for an endless learning resource that will improve your auditing and research skills? This one covers ~300 real-world exploits and provides Foundry tests used to perform each attack locally on a forked network. You can thank me later ✌️
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@GeorgeHNTR
George Hunter
10 months
Late night thoughts: If I go all-in on bug hunting on @immunefi throughout the whole 2024, would I be able to reach the Top 15 and earn >$1M by 2025? I truly believe I'm capable of achieving it.
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@GeorgeHNTR
George Hunter
1 year
Auditing is sometimes so strange... - you work with several audit firms - paying hundreds of thousands of dollars for their services - they spend tens of human weeks inspecting every single line of code and then... some anon kid takes a look at your codebase for one night
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@GeorgeHNTR
George Hunter
10 months
I just found the resources my last employer gave me to prepare for my first job as a Smart Contract Engineer over a year ago. No courses, no tutorials, just straight-up docs. That's the way I liked to learn too. What would you change or add now? 🤓
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@GeorgeHNTR
George Hunter
9 months
I wish I wasn't a smart contract security auditor... I want to put my money in a DeFi protocol. But to feel really safe, I need to spend a couple days reviewing their code and understanding the whole system completely before clicking the deposit button.
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@GeorgeHNTR
George Hunter
2 years
My first 2 smart contract audit reports are now public on my GitHub profile 👀 The stats: - 2 critical vulnerabilities - 8 medium severity issues - 21 lows and informational findings The client was more than happy with both audits 😊
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@GeorgeHNTR
George Hunter
2 years
CTFs are the best way to practice smart contract hacking when you're a beginner Three of the most popular CTFs are: • Damn Vulnerable DeFi • Ethernaut • Capture The Ether You can check out my solutions for each of them here
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@GeorgeHNTR
George Hunter
1 year
My first unique high severity finding at @sherlockdefi and a pretty good reward for a one night contest 🎉 It was a pretty simple issue that I learned from @paladin_marco 's pinned tweet quite some time ago 🙏
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@GeorgeHNTR
George Hunter
1 year
I feel encouraged
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@GeorgeHNTR
George Hunter
1 year
The @SpearbitDAO entry task from last year is still a good exercise for beginners to test their hacking skills. It contains a critical vulnerability that you should always check for during a security review. The bonus task is also very interesting. 👀
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@GeorgeHNTR
George Hunter
10 months
🚨 All Solidity developers should check the list below before submitting their codebase for audit. It's almost 2024, if you're still not familiar with all weird ERC20 token behaviours and integrations listed below, you lack behind. 👇
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@GeorgeHNTR
George Hunter
1 year
Everyone supports the whitehats until it comes to paying out bug bounties.
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@GeorgeHNTR
George Hunter
11 months
Audit Contests Alpha: Audit contests are a game of reporting and negotiating for medium-severity findings. Highs are usually black and white and rarely solos, but almost all of the top researchers' findings that I've read are very nuanced and in places that no one even looks at.
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@GeorgeHNTR
George Hunter
2 years
Top 4 discord communities for smart contract auditors: • @TheSecureum @code4rena @sherlockdefi @SpearbitDAO Remember, your network is your net worth 💰
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@GeorgeHNTR
George Hunter
1 year
When you audit a protocol that will be deployed on multiple different EVM chains you should verify that it will be working on all of them. An example of quite crucial mistake is assuming that USDC or USDT always have 6 decimals, while on BSC they both have 18 decimals precision.
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@GeorgeHNTR
George Hunter
2 years
1/ Part 2/2 Signature Malleability 📝 А thread explaining another type of signature malleability in smart contracts 🧵 If you haven't seen part 1, check it out here 👇🏼 As last time, I’d appreciate a retweet, spread the knowledge with others 🫡
@GeorgeHNTR
George Hunter
2 years
1/ Signature Malleability 📝 А thread explaining what the Signature Malleability vulnerability is in smart contracts 🧵 I’d appreciate a retweet, spread the knowledge 🫡 Also, I'll post part 2 explaining a second type of Signature Malleability, so turn on the notifications 🛎️
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@GeorgeHNTR
George Hunter
1 year
If this vulnerability was responsibly disclosed instead of exploited: - JPEGd's users wouldn't have lost $11 million - No reputational damage would have been caused - The guy would have gotten a solid bug bounty instead of been front-run by a MEV bot Choose the right hat anon
@peckshield
PeckShield Inc.
1 year
Hi @JPEGd_69 , you may want to take a look:
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@GeorgeHNTR
George Hunter
10 months
I'm hearing about more and more junior solo auditors breaking into the space with PPV security audits, and I think it's a really good deal for both low-budget projects and inexperienced auditors. Here's a simple pricing I've seen from multiple parties:
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@GeorgeHNTR
George Hunter
1 year
So many people decided they wanted to become ZK security researchers yesterday, just by learning the basics in 1 week and entering a contest next month. My opinion is that unless you have longer term plans to do ZK stuff, you should focus on what you're already trying to succeed
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@GeorgeHNTR
George Hunter
11 months
How to build a successful career in web3 security? Choose your path and stick to it, putting all your effort and hours into it. Many people do contests, solo audits, bug bounties, running a firm, etc., but in the end, they do not truly master any of these crafts. Some folks
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@GeorgeHNTR
George Hunter
5 months
Every day I hear stories from folks like @deadrosesxyz and @KrisApost1 about bagging $10k for a 1-hour bug hunt or winning 6-figure bug bounties. Yet, what really excites is when someone makes their first $1,000 bucks on @code4rena . Nothing is as sweet as your first small win.
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@GeorgeHNTR
George Hunter
1 year
Did you know that the `ecrecover()` function in Solidity doesn't update the free memory pointer with all the used memory? This can be pretty dangerous, especially if there's inline-assembly code relying on zeroed-out memory after the free memory pointer. Here's an illustration:
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@GeorgeHNTR
George Hunter
8 months
The best way to get audit clients: - referrals from previous clients and fellow auditors Always lovely to read such stuff.
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@GeorgeHNTR
George Hunter
1 year
Trust the *mediation* process, whitehat. @immunefi has your back 🫡
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@GeorgeHNTR
George Hunter
9 months
Spicy take: 🌶️ There are good security auditors who do bad marketing. And there are good marketoors who do bad security audits. Haven't seen anyone who does both great.
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@GeorgeHNTR
George Hunter
10 months
One thing I find extremely valuable during an audit is having a live 1:1 conversation over a call with a junior auditor. Last weekend, I did a 4-hour session like that, which helped me stay more focused and also gain deeper understanding more quickly as I had to ELI5 everything.
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@GeorgeHNTR
George Hunter
10 months
In the past 24 hours I: - had 5 hours of sleep - completed 3 team audits mitigation reviews - closed a deal with a high 9-figure TVL protocol - had 2 calls with previous/current clients - researched a security topic for future project No big gains, just hard work. 🥱
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@GeorgeHNTR
George Hunter
11 months
Last night I found a critical smart contract vulnerability in @LayerZero_Labs 's bug bounty program for $15M. 🤯 Then I woke up.. Going back to the solo audits I guess. 😕
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@GeorgeHNTR
George Hunter
7 months
The best thing about making a lot of money in web3 security? Being able to offer internships to junior auditors who can't afford to do it full-time but really want to. Also, being able to find work for senior fellows and offer even higher quality service to protocols. ⬇️
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@GeorgeHNTR
George Hunter
2 years
A total of 22 hours spent this weekend reading audit reports and studying past exploits. I've learned a ton and always feel like I'm just getting started. This is what I like most about web3 security. Always level up 🫡
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@GeorgeHNTR
George Hunter
6 months
I share too much alpha in DMs that doesn't make it to the public. Planning to collect all advices and key chats from the Hunter Security Mentorship and publish them at the end. Including stuff like: - how to perform well in contests - how to achieve high audit coverage - how
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@GeorgeHNTR
George Hunter
2 years
What do you think the answer is 🤔
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@GeorgeHNTR
George Hunter
4 months
You think there's nothing sexier than your girlfriend? Take a look at Euler's V2 smart contracts + documentation and we'll talk again.
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@GeorgeHNTR
George Hunter
1 year
At the end of an audit, you should have a deeper understanding of the smart contracts than the people who designed, developed, and tested them over the past few months or even years. That's why one piece of advice I like to give to most beginners is to first learn how to gain a
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@GeorgeHNTR
George Hunter
4 months
Hard-learned lesson: You want to rise in the web3sec space? Great! But don't do it by bringing others down... morality > business
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@GeorgeHNTR
George Hunter
1 year
A good summary of the leading auditors from all different types of audits being offered out there. Pretty interesting to see the solo audit column being all Bulgarians. 👀🇧🇬 Check out the full blog post by @0xBeirao :
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@GeorgeHNTR
George Hunter
1 year
The fact that a junior developer with 2 weeks of experience might know some things that the top security researchers don't is why I believe that: 1. audit contests are undoubtedly a great model 2. "there will always be one more bug"
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@GeorgeHNTR
George Hunter
2 years
• You feel like you've mastered Solidity? Learn inline-assembly. • You feel comfortable with inline-assembly? Study pure Yul. • You feel like you know Yul too? Go read some unverified smart contract's bytecode, hacker 💻
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@GeorgeHNTR
George Hunter
1 year
Something I do before the end of an audit is to take 1 day off without thinking about the codebase. Then I come back, remove all my notes (or git clone again) and look for more creative and sophisticated vulnerabilities, leveraging the knowledge and context I've gathered so far.
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@GeorgeHNTR
George Hunter
1 year
Web3 security twitter by the end of October: "DM for solo ZK audits" Mark my words.
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@GeorgeHNTR
George Hunter
9 months
I created a small research and summary document for a client of key considerations when integrating Chainlink VRF in your smart contracts. The resources I mostly used were Chainlink's docs and Solodit. Feel free to check it out and suggest improvements:
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@GeorgeHNTR
George Hunter
1 year
0:26 - I get invited to a private smart contract repo of a potential client. 2:34 - I start reviewing the contracts to assess the scope of work and prepare an appropriate quotation. 3:43 - I get back to the client with the quote as well as 1 Critical and 2 High findings.
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@GeorgeHNTR
George Hunter
5 months
First time having a project I've audited several times scam me for a 5-figure $$$. An expensive reminder to always set up legal contracts and have full upfront payment.
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@GeorgeHNTR
George Hunter
2 years
Guess who won't get paid for their valid critical bug submission on Immunefi...
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@GeorgeHNTR
George Hunter
1 year
If you are looking for a way to leverage your bug bounty you may find this tools useful. Recently used it to find other contracts that rely on a contract I found a vulnerability in by simply entering its address. Thanks to @christos_eth for sharing! ✌️
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@GeorgeHNTR
George Hunter
1 year
Did you know that Arbitrum does not yet fully support contracts compiled with solidity version 0.8.20? This may be an interesting finding in your next audit.
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@GeorgeHNTR
George Hunter
1 year
As an auditor, taking on too much work is unhealthy for both you and your clients. After missing a couple of highs in a recent private audit due to low time commitment, I plan to take a step back, get some good rest, and start managing my workload more effectively.
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@GeorgeHNTR
George Hunter
6 months
Only in web3 you can find folks making 7-figures a year and living on 3-figures a month.
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@GeorgeHNTR
George Hunter
1 year
Seeing... unchecked { ++i; } ...at the end of every `for` loop while auditing a smart contract codebase is killing me. Next time I see this I'll just offer a 3% discount of the audit quote if they simply rewrite it to `i++`.
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@GeorgeHNTR
George Hunter
10 months
9 Bug Bounty Programs have launched on @immunefi just over the past 1 week with over $4 Million in max rewards... I might soon take a big break from the solo & team audits and test my skills in the wild. The bull market is coming. 📈
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@GeorgeHNTR
George Hunter
11 months
Just yesterday I received 5 requests for audit. - 3 from new projects (solo) - 1 from a previous client (solo) - 1 from Paladin (team) Demand for solo auditors is definitely there and here to stay. ✌️
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@GeorgeHNTR
George Hunter
2 years
I've been learning smart contract security vulnerabilities for 2 months now 🕒 This weekend was my first audit contest at @code4rena since then and I think I managed to report some pretty interesting findings 👀 Waiting for the results to come out 🤞🏼
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@GeorgeHNTR
George Hunter
1 year
I haven't had a resting weekend for probably over half a year now and this one felt so refreshing - no solidity, no web3 stuff, no smart contract vulnerabilities.. just me, my car, my friends and good music.
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@GeorgeHNTR
George Hunter
9 months
I thought to have the most clients, I had to be the best researcher. Turns out almost no one cares about actual high-quality security reviews. The only thing that matters is reputation. Whether it's built through great security work, or just by tweeting newbie stuff every day.
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@GeorgeHNTR
George Hunter
2 years
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@GeorgeHNTR
George Hunter
1 year
For anyone who has DM'd me asking where to find a top job as a smart contract auditor, check out this list of open positions for auditors and security researchers made by @0xaash 🔥
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@GeorgeHNTR
George Hunter
2 years
Have you set your goals for 2023? 🚀 These are mine: • Start a full-time job as a Smart Contract Security Researcher 💻 • Place in the top 25 in @code4rena and @sherlockdefi leaderboards🏅 • Join @SpearbitDAO 🤞🏼 • Grow tweeter profile to 5k followers 🚀 • Retire mom ❤️
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@GeorgeHNTR
George Hunter
9 months
Back in my early days, studying late at night in the office from @1nf0s3cpt 's amazing resource: No courses, no roadmaps, no mentoring. Just thoroughly researching, consuming as much quality educational content as possible to prepare for this journey.
@GeorgeHNTR
George Hunter
2 years
Love grinding at weekends alone in the office, gives me a great feeling of being one step ahead of everyone else
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@GeorgeHNTR
George Hunter
8 months
How it all started about a year ago...
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@GeorgeHNTR
George Hunter
1 year
I think this picture says it all.
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@GeorgeHNTR
George Hunter
1 year
@0xMackenzieM One of the best things about web3 security - there are no age, gender, race, religion or other similar limitations. Pure skills is what is noticed and valued the most. Here's a really good part of Andy's latest video where Pashov talks about how 18-20 y.o. young men who he knows
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@GeorgeHNTR
George Hunter
1 year
I just uploaded one of my latest and by far favorite solo smart contract security review reports. It contains 4 Critical, 2 High and 2 Medium severity findings, all of which have an executable Proof of Concept (Foundry test). Check it out!
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@GeorgeHNTR
George Hunter
2 years
A common trick that even I've used to test people auditing my smart contracts - leave some pretty obvious issues in the code on purpose and see if they'll catch them. I tried it once with a fairly expensive audit from a tier 1 company and they reported none of them 😬
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@GeorgeHNTR
George Hunter
1 year
If you have more than 10 high/critical severity issues per 1000 sloc, you definitely need: 1. a second audit by the same or another auditor 2. better developers I personally wouldn't feel safe otherwise with this project if I were the auditor or the developer or even a user.
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