OKX DEX suffers $2.7 million hack

OKX DEX is a service by OKX that aggregates decentralized exchanges (or DEXes) to help users access features and prices across multiple projects. On December 12, an attacker appeared to gain administrative control of the DEX's smart contract. They upgraded the contract such that they could transfer tokens to themselves, then proceeded to do exactly that until they had stolen around $2.7 million in various cryptocurrencies.

It appears the attacker was able to gain access to the smart contract admin key, which gave them the ability to upgrade the contracts to enable malicious functionality.

OKX announced that they would reimburse the losses, and pursue legal action against the exploiter.

KuCoin fined $22 million in New York

The KuCoin cryptocurrency exchange has agreed to a settlement in which it will pay a $22 million fine and ban residents of New York state from its platform. The New York Attorney General sued KuCoin in March, alleging they had been serving New York customers despite not being registered in the state.

KuCoin has admitted to allowing New Yorkers to trade securities and commodities on the platform, and representing themselves as an "exchange" without having registered as such.

In addition to paying the fine, KuCoin has agreed to shut down all New Yorkers' accounts in the coming months and prevent residents of the state from signing up for new accounts.

Yearn Finance accidentally swaps its entire Ip-yCRVv2 treasury, asks nicely for the money back

Periodically, Yearn Finance converts a small quantity of its treasury tokens into stablecoins to spend on operations. However, something went terribly wrong during this process when they went to perform the swap and erroneously converted the entire amount — nearly 3.8 million Ip-yCRVv2 tokens — into a stablecoin. According to one Yearn Finance employee, this pool of tokens comprised around 3% of the project's treasury.

Because there was not sufficient liquidity for such a large trade at the going price, the trade was ultimately fulfilled, but at a 63% loss. Before the trade, that quantity of tokens was priced at around $2.28 million; however, Yearn received only around $780,000 in stablecoins because of the slippage.

Yearn quickly identified the issue and embarked on a campaign to ask nicely for the counterparties in the trade to please give some of their profits back. In on-chain messages, Yearn wrote: "one of yearns multisigs made a costly mistake last night that affected a critical source of yCRVs liquidity. we identified you as having made a profit off of this and are kindly requesting that you return as much as you see reasonable to yearns main multisig: ychad.eth. sorry we have to ask this, but hope you can understand." Doesn't hurt to ask, I guess. So far, only one wallet has taken them up on the offer, returning 2 ETH (~$4,400).

Uranium Finance hacker cashes out in Magic: The Gathering cards

Stacks of <i>Magic: The Gathering - Fallen Empires</i> booster boxesMagic: The Gathering booster boxes (attribution)
In April 2021, an attacker stole $50 million from the defi exchange Uranium Finance. Blockchain investigator zachxbt now says that he believes this attacker has been able to cash out his ill-gotten funds... in an unusual way.

After tracing the attacker's attempts to launder the money through Tornado Cash and then obfuscate that it had come from the mixing service (something that raises flags at some exchanges), zachxbt observed the funds go to a broker of Magic: The Gathering based in the United States. Altogether, the hacker appeared to be spending millions on starter decks, alpha sets, and sealed boxes — often overpaying by 5-10%. These items routinely sell for hundreds or thousands of dollars.

The thief is probably a creative money launderer rather than an massive MTG fan, and is probably reselling the cards to further obscure the source of the money. Then again, MTG is more than a little addictive.

Do Kwon reportedly to be extradited to the United States

Do Kwon, founder of the collapsed Terra/Luna project, will be extradited from Montenegro to the United States once he's completed his four-month-long jail sentence for document forgery, says the Wall Street Journal. Although a Montenegrin court had already approved his extradition, it left the decision of whether to send him to South Korea or the United States up to Justice Minister Andrej Milovic. Milovic has reportedly privately said he intends to send Kwon to the US.

Kwon filed a last-ditch appeal of the extradition decision on December 6. A decision is scheduled on the matter by December 15. Milovic is unlikely to publicly announce Kwon's extradition destination until then.

Both South Korea and the United States have sought Kwon's extradition on criminal charges related to the Terra/Luna scheme. Federal prosecutors in the Southern District of New York indicted Kwon on eight fraud and market manipulation charges in March 2023. He and his company also face a civil lawsuit from the Securities and Exchange Commission.

The AEUR stablecoin isn't

Chart of the AEUR price in USDT, showing it maintaining its €1 (~$1.08) peg before spiking to over €3, dropping somewhat, and trending back upwardsI don't think "stable"coins are supposed to do that (attribution)
Binance says traders must have missed the memo on the AEUR stablecoin, which was intended to be pegged to the Euro. Shortly after it was listed on Binance, high demand caused the token — which had a limited supply of 5 million — to begin trading for as high as €3 per token. "[U]sers ... might not have realized its standing as a stablecoin" wrote Binance in an announcement, published the day after the exchange suspended trading in the token due to "abnormal volatility".

Binance announced a compensation plan for users who purchased the token during an eligibility period and who were unable to resell, in an apparent attempt to placate the angry traders who accused Binance of "scamming" them by halting trading.

AEUR was issued by Anchored Coins, a Swiss stablecoin issuer.

Nostr Assets gets clogged up

The Nostr Assets bitcoin platform has had to ask people to stop depositing into their platform because it's all clogged up. The project uses the bitcoin Lightning Network, which itself is an attempt to overcome the slowness and high cost of the bitcoin network. However, it too has limited capacity, and Nostr Assets has announced that the "inbound capacity of lightning channels" was depleted.

Meanwhile, the founder of the Nostr social media platform has accused Nostr Assets of being an "affinity scam" by falsely suggesting in their platform name and $NOSTR token naming they are affiliated with the Nostr project. Nostr Assets has described the allegations as "unfounded", saying that their use of the Nostr network means the name is "pertinent", and suggesting that Nostr's founder has no basis to dictate who can use the Nostr name as it is a decentralized and open source project.

Rob Robb robs victims of $1.2 million

If you're named Rob Robb, do you have any choice but go into a life of thievery?

Robb, also known as "pokerbrat2019", convinced at least 11 people to give him a total of $1.2 million, which he said he would use to develop various MEV bots. Instead of doing so, he pocketed the money, offering a litany of excuses for why the project was continually delayed.

Robb had previously been convicted of a $4 million scam in 2002 after soliciting funds for an online gambling platform, instead using the money to buy a car and fund his own gambling.

Ethereum projects scramble to address widespread smart contract vulnerability through ThirdWeb

Projects using the suite of pre-built smart contracts from crypto development platform ThirdWeb have been racing to migrate to patched versions as ThirdWeb has disclosed a vulnerability affecting dozens of its contracts. Although they claim no contracts containing the vulnerability have been exploited, they've urged projects using them to urgently migrate to updated versions without the flaw.

Projects relying on these pre-built smart contracts will have to lock the old contract and deploy new ones, then provide new versions of tokens via airdrop or a claim page — a fairly disruptive process.

Major NFT marketplace OpenSea issued a statement that they were working with ThirdWeb about a vulnerability "impacting some NFT collections". Rarible also stated that some NFT collections on their platform were affected, including some on the Polygon sidechain. Coinbase and Base also disclosed that some projects on their platforms were vulnerable. Projects by groups including Cool Cats and Mocaverse will need to be migrated.

Users of the Safe Wallet lose cumulative $2 million to address poisoning

Users of the (not so) Safe Wallet have lost $2.05 million altogether in the past week as they've been targeted by an attacker using an address poisoning attack. The same attacker was also behind such an attack on the Florence Finance real-world lending protocol, in which they stole $1.45 million.

According to research group ScamSniffer, the attacker has stolen at least $5 million from at least 21 victims in the past four months.

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