10,000BTC pizza purchase
Happened on May 22nd, 2010Florida Bitcoin “miner” Laszlo Hanyecz pays 10,000 Bitcoins that he mined himself for two pizzas. At the time, Bitcoin did technically have an exchange rate of a few cents, but who knew that? The purchase price for the pizza was approximately U$25. Selling 10,000 units of unknown computer code for two real pizzas seemed like a great deal at the time.
- — nothing documented for 5 years —
Olympic: Frontier Pre-Release
Happened on May 9th, 2015On May 9th, 2015, the Olympic: Frontier pre-release was announced by the Ethereum Foundation. The release was meant as a proof-of-concept and included a bounty program to receive up to 25,000 Ether for things like sending out the most transactions, being the miner that includes the most transactions, or finding serious issues like creating a (substantial) fork between Go and C++ clients. https://blog.ethereum.org/2015/05/09/olympic-frontier-pre-release
- — nothing documented for 4 years —
Binance hacked for $40M
Happened on May 19th, 2019A group of hackers were able to gain control of a number of user accounts and made large withdrawal requests in such a way that they bypassed their pre-withdrawal risk management checks. Binance's post-withdrawal risk monitoring system caught it immediately, and suspended all subsequent withdrawals. The hackers stole around 7,000BTC.
WalletGenerator key generation vulnerability
Happened on May 24th, 2019This project changed ownership approximately two years ago (2017). It was recently brought to attention that the code being served had tried to hide logic to make their RNG deterministic, compromising the integrity of the private keys that were generated. Looking at the snapshots on the Wayback Machine, we can determine that the malicious behaviour was introduced sometime after 2018/08/17 and definitely by 2018/08/25.
Hacker Attempts to Sell Data Allegedly Tied to Ledger, Trezor, BnkToTheFuture Customers
Happened on May 24th, 2020A hacker is purportedly trying to sell customer information that stems from companies like Keepkey, Trezor, Ledger, and even the investment platform Bnktothefuture. The hacker doesn’t seem to have any passwords, but is offering detailed information that was stolen from an alleged Shopify breach like email addresses, home addresses, and phone numbers. Allegedly, the hacker also breached the Bnktothefuture SQL database and scooped up identity information from that investment platform as well.
DeFi100 exit scams with $32M
Happened on May 22nd, 2021A DeFi protocol exit-scammed with open messages taunting their users with “we scammed you guys and you can't do shit about it”. The next day, they issued a statement saying they did not exit scam and restored the website to its former state. DeFi100 asks users to chain the chain for the D100 tokens and claim the accusations of an exit scam are "absolutely false and baseless"