The theft appeared to have been enabled by someone who had access to the project's admin key, and was able to change the token owner to an address where they then minted and withdrew tokens, amounting to a $7.6 million theft.
A decentralized finance project called FinNexus was reportedly hacked for $7.6 million, in what was widely speculated to actually be a rug pull by the project's developers.
An attacker pulled $10.85 million in funds out of one of bEarn Fi's vaults by exploiting a bug that allowed them to withdraw more funds than they deposited. bEarn promised to compensate affected users with 105% of the amount they lost.
A flash loan attack allowed hackers to exploit two vulnerabilities in the xToken DeFi platform and steal $24.5 million. This was the first of two large-scale hacks of the platform this year.
After a $10 million hack just two days prior, Value DeFi had another $11 million stolen after attackers found and exploited a different bug in their smart contract.
Attackers exploited a bug in Value DeFi's smart contract to drain $10 million out of the platform, in a second attack in six months. In November 2020, the platform had lost $7 million to a flash loan attack, after bragging about their "flash loan attack protection". The group was also discovered to be using a paid actress to pretend to be one of their co-founders.
A flawed calculation pertaining to the liquidity pool of Spartan Protocol allowed an attacker to drain $30 million from the project.
- "Spartan Protocol exploit results in loss of $30M", Cointelegraph
Frank Schilling, founder of the Uni Naming & Registry (UNR) held an auction for 23 TLDs (the bit at the end of the domain, like .com or .org). These included
.game, and even
.christmas. The April auction grossed more than $40 million, but as of mid-December the transactions had not been completed. This is because UNR attempted to add some marketing flair to the auction by including NFTs for each of the TLDs, to go to the auction winners. ICANN, the group responsible for much of the domain world, objected to and withheld consent for the transactions, writing "we sought to understand the impact of the transactions on the Domain Name System ('DNS'), including how Non-Fungible Tokens (NFTs) created on the Ethereum Name Service (ENS) were being used, and were involved in the transactions. ICANN repeatedly asked UNR for documentation or other information related to NFTs in the hopes that UNR would provide fulsome and complete responses."
- NFTs trip up Uniregistry's top level domain auctions, Domain Name Wire
A bug in Uranium Finance, a DeFi exchange based on Binance Smart Chain, allowed an attacker to drain the liquidity pools for multiple token pairs. Uranium had just commissioned an audit which uncovered the bug, but the attack occured two hours before the patch went live. An apparent member of Uranium's development team wrote that they believed the attack had been the result of leaked information.
An employee of the ZKM Centre for Art and Media in Karlsruhe accidentally sent two of their four Cryptopunk NFTs back to its smart contract address. This is referred to as "burning" the NFTs, because the address is inaccessible and the NFTs are permanently impossible to trade as a result. The employee had copied the Cryptopunks contract address while browsing Etherscan, and didn't realize that was what he was pasting while making the transfer — wallet addresses are long hex strings like 0xb47e3cd837ddf8e4c57f05d70ab865de6e193bbb and are prone to errors like this since they are not easily distinguished at a glance. The two NFTs were originally acquired for the museum for approximately $100 each in 2017, and are individually valued at around $187,000 as of January 2022.
Turkish Bitcoin exchange Thodex halted trading and limited customers' access to their investments, claiming it was to investigate suspicious activity and swearing it was not an exit scam. With an international manhunt now underway for the Thodex CEO, and no sign of the approximately $2 billion that was invested in the platform, it seems awfully likely it was a rug pull.