A Robin Hood-esque attacker steals $52 million from Cashio, then returns smaller amounts and pledges to donate the rest to charity

March 23, 2022

A Robin Hood-esque attacker steals $52 million from Cashio, then returns smaller amounts and pledges to donate the rest to charity

A hacker was able to exploit an infinite mint glitch in the protocol of Cashio, a Solana stablecoin project. They were able to pull around $50 million out of the platform, while also tanking the value of the $CASH token in the process. The attacker left a note in the input data of their Ethereum transactions that "Account with less 100k have been returned. all other money will be donated to charity."

Saber, the providers of the Cashio liquidity pool, published a postmortem of the attack in which they wrote that "We do not have the money to pay back depositors." The hack was the second largest in Solana history, behind the February Wormhole hack. Saber entreated the hacker to return the funds, writing, "accounts with over $100k are often users' life savings on leverage, and many of us will seriously be affected financially after this incident."

On March 28, the attacker sent a message saying that "the intention was only to take money from those who do not need it, not from those who do", and invited users who had over $100,000 to apply to receive their funds back with "an explanation of the source of this money and why you need it back. more detail is better. money will not be refund to rich american and european that don't need it." Somewhat strangely, Cashio themselves began hosting a website to allow affected users to plead with the hacker to return the money.

"Solana Stablecoin Project Cashio Plummets to Zero After Multi-Million Dollar Hack", Decrypt
Tweet thread by CertiK Alert
"Postmortem: Cashio Hack", Saber Labs

March 22, 2022

VeVe marketplace goes offline for over a day after an exploit results in a "large amount of gems being acquired illegitimately"

(attribution)

The VeVe marketplace has developed a bit of a reputation as the partner of choice for some big names who have dipped their toes into "licensed digital collectible" NFTs, including Marvel, Pixar, and Coca-Cola. It is also notable for using in-app tokens called Gems, which can be purchased with credit cards, but have been impossible to cash out since the mid-2021 launch (though VeVe has very recently said they are beta testing a cashout system).

On March 22, VeVe tweeted that "We have become aware of an exploit of our systems which resulted in a large amount of gems being acquired illegitimately", and that they had closed the market, as well as purchases and transfers of Gems. The market remained closed for over a day as VeVe apparently triaged the problem. It's not clear yet what the impact has been to the platform or its users, though many reported that their NFTs appeared to have plunged in value.

"Marvel NFT partner Veve closes its marketplace after an in-app token exploit", Cointelegraph

March 21, 2022

Phishing scheme promising to animate one's apes nets attacker a collector's three pricey Bored Apes

A Bored Ape with leopard print fur, wearing a black bowler hat and American flag shirt with a deep V-neck, with half-closed red eyes, on an orange background

BAYC #71 (attribution)

An NFT collector fell for a scam website promising to "turn your BAYC animated". After connecting their wallet, the attacker transferred their three pricey Bored Ape NFTs to their own wallet, then quickly flipped them for resale for a combined total of around 264 ETH ($764,000). Zachxbt, a crypto fraud sleuth who first noticed the scam, estimated the NFTs' actual value at closer to $900,000.

It appeared from the victim's retweets that they had fallen for a scam shared by a verified Twitter account that claimed to be one of the Bored Apes founders. However, a closer look at the Twitter handle showed it was a hacked account with the username "volt_france", which previously had belonged to the French branch of the Volt Europa political movement.

Tweet by Zachxbt

March 21, 2022

Hacker steals more than $1.5 million after compromising wallets belonging to crypto whale Arthur_0x

CloneX #13992, one of the stolen NFTs (attribution)

Arthur_0x, a crypto investor and NFT whale, had two of their hot wallets compromised. The attacker stole ETH and transferred some big-ticket NFTs out of the wallets, including at least five CloneX NFTs and 17 Azuki NFTs. CloneX NFTs have been selling for an average of 16.76 ETH (about $50,000) over the past 30 days, and Azuki NFTs have been going for 12.5 ETH ($37,600). The attacker had not yet sold all the NFTs they had stolen, but within two hours of the attack they had 545 ETH (about $1.6 million) in their wallet.

Arthur_0x wrote on Twitter that they had previously only ever used a hardware wallet on their PC, but when they started more regularly trading NFTs they'd started using a hot wallet. "Hot wallet on mobile phone is indeed not safe enough", they wrote on Twitter, "Guess no more hot wallet usage then." They also wrote, "The only thing I can say to the hacker is: you mess with the wrong person" and tweeted the wallet address to which the NFTs were being transferred, asking for it to be blocklisted.

March 21, 2022

Hacker steals $1.45 million from OneRing Finance using code that self-destructs after the attack

(attribution)

A hacker was able to use a flash loan attack to exploit an issue with OneRing Finance. By manipulating the price of tokens in the project's liquidity pool, the hacker was able to draw out 1.45 million USDC, a stablecoin pegged to the US dollar. According to PeckShield, the loss to the protocol was larger than what the hacker actually was able to cash out.

The hacker complicated things somewhat for OneRing by covering their tracks. They used a "self-destruct" mechanism — typically used by developers to destroy smart contracts that are found to have a bug — to destroy the contract they used to carry out the attack, making it more difficult for OneRing to determine which parts of their codebase were vulnerable and led to the attack.

"OneRing Finance exploit. Post-mortem — After OShare Hack.", OneRing Finance blog
Tweet thread by PeckShield

March 19, 2022

NFT scammers take over the Twitter account of a Florida gubernatorial candidate

Nikki Fried's compromised Twitter profile (attribution)

The Twitter account belonging to Nikki Fried, the current Florida Agriculture Commissioner and a Democratic candidate for the 2022 Florida gubernatorial race, was compromised and repurposed as an NFT shill account. The account, which was verified and had more than 270,000 followers, suddenly underwent what I imagine was a bit of a startling rebrand for her followers: her name was changed to "nikki.eth", and the Twitter bio was replaced with "Mod for SkulltoonsNFT, ThugBirdz, AzukiZen. Web3 Enthusiast". The account also changed its banner and profile pictures to Skulltoons images, and started tweeting about giveaways. By March 20, Fried had apparently regained control of the account, though the account privacy had been changed to protected.

The Fried account compromise is only one instance of what has become a trend on Twitter: Twitter accounts belonging to high-profile individuals, or accounts that are verified or have a large number of followers, being compromised and sold to NFT scammers. On March 11, ESPN baseball reporter Jeff Passan also had his twitter account compromised and repurposed to shill Skulltoons NFTs. Skulltoons distanced themselves from that incident, writing that they believed the hackers were trying to scam their NFT community.

"Hackers hijack Nikki Fried’s campaign Twitter account", Florida Politics

March 18, 2022

People briefly borrow Bored Ape NFTs to claim as much as $1.1 million in $APE tokens

(attribution)

The Bored Ape Yacht Club recently created a token called ApeCoin, some of which they announced would be distributed to people who owned various Bored Ape NFTs and NFTs from their related collections. However, because the token distribution didn't use a snapshot of ownership data, but rather distributed tokens per-NFT to the first owner who claimed them, people were able to game the system. Some owners of Bored Ape and related NFTs had put their NFTs into an NFTX vault, which is a setup where someone takes a subset of their NFTs and creates a token that is based on them. The token can then be staked to generate yield, or can be sold, and if someone owns enough of the tokens, they can redeem them for the NFTs. A clever operator found a vault containing five Bored Ape NFTs, which had unclaimed $APE associated with them since they were locked up in the vault. They used a flash loan to purchase a large amount of the vault's token, redeem the five BAYC NFTs, claim the airdropped tokens, return the BAYC NFTs, sell back the tokens, and repay the loan, all in one transaction that cost them nothing but netted them 60,564 $APE, which they then swapped for 399 ETH ($1.1 million).

People were somewhat split on whether this could be classed as a vulnerability in the $APE airdrop, since (as with many crypto hacks and scams) the person was operating completely within the rules set out in code.

March 18, 2022

Australian regulatory agency begins lawsuit against Facebook over failing to address scammy crypto ads

The Australian Competition & Consumer Commission (ACCC) announced that they had begun federal court proceedings against Facebook, alleging that the company "engaged in false, misleading or deceptive conduct by publishing scam advertisements featuring prominent Australian public figures". The ACCC claims that Facebook ads featured prominent Australian individuals without their approval, and implied that the crypto schemes were associated with or endorsed by those individuals. When a person clicked through the link, they were invited to provide contact information to a group of scammers who reportedly incessantly called the targets to pressure them into putting money into the schemes — in one case, a Facebook user lost more than $650,000. The ACC alleged that Facebook "aided and abetted or was knowingly concerned in false or misleading conduct and representations by the advertisers", but didn't take sufficient action to stop the misrepresentation, even after public figures raised the alarm about their likenesses being used without consent to scam people.

"ACCC takes action over alleged misleading conduct by Meta for publishing scam celebrity crypto ads on Facebook", Australian Competition & Consumer Commission

March 16, 2022

Discord hack targeting Rare Bears NFT project nets attacker $800,000

An illustration of a bear wearing a crown, with laser beams firing from its eyes, with headphones around its neck, holding a molotov cocktail

Rare Bear (attribution)

After hackers successfully compromised the account of one of the Rare Bears Discord moderators, they posted an announcement that new NFTs were being minted. Those who tried to participate in the mint wound up having their accounts compromised and their NFTs stolen. The hackers sold most of the 179 NFTs they stole, for a combined total of 286 ETH (more than $800,000).

Not only did the attackers post a fake mint link, they took steps to prevent the project from thwarting their attack by banning other members and removing user rights that would have allowed other project members to delete the fake links. They also added a bot to the server that locked channels so people couldn't send warnings that the links were fake.

The Rare Bears team did eventually regain access and secured their Discord server. In an apology posted on their Twitter page, they addressed the multiple security breaches that Rare Bears have faced to date, and said they had "stepped up" and would be having a firm audit their project.

"Rare Bears Discord phishing attack nabs $800K in NFTs", CoinTelegraph
"Hacker steals $790,000 of NFTs and crypto from owners of Rare Bears", The Block

March 15, 2022

Hundred Finance and Agave Finance are both exploited for a collective $12 million

(attribution)

An attacker using a flash loan attack targeted two projects on the Gnosis blockchain: Hundred Finance and Agave Finance. Each project paused their smart contracts, but not before the attacker made off with a considerable sum of money. That day, the attacker put the funds through a cryptocurrency tumbler, making it much more difficult to trace the collective 4,479 ETH that was stolen in roughly equal amounts from each protocol.

Hundred and Agave were the second and third defi protocols targeted by flash loan attacks that same day, with Deus Finance losing more than $3 million to hackers using the same class of exploit.

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