After the attack, Jimbos Protocol tweeted "We are aware of the exploit regarding our protocol and are actively in contact with law enforcement and security professionals. We will release further information when possible." They also sent an on-chain message to the exploiter, offering to stop all investigations if the hacker returns 90% of the stolen funds.
Jimbos Protocol exploited for $7.5 million
Three days after the launch of its v2 protocol, the Arbitrum-based Jimbos Protocol was exploited for 4,090 ETH (~$7.5 million). The project had not properly controlled for slippage, which enabled an attacker to use a flash loan to manipulate the trading pairs on the project. The attacker then bridged the stolen funds to the Ethereum chain.
Brand new $CS token exploited for almost $700,000
An attacker exploited the brand new $CS token for almost $700,000 using a flash loan exploit. They then swapped the funds into around 383 ETH ($689,400) and laundered them through Tornado Cash.
0VIX Protocol exploited for $2 million
The 0VIX defi protocol on the Polygon blockchain was exploited for around $2 million. This was a substantial portion of the project's roughly $6.4 million TVL around the time of the hack. The attack was perpetrated by an attacker who manipulated an oracle, which then allowed them to execute a flash loan attack on the project.
The protocol was paused following the attack. 0VIX later tweeted that they had been collaborating with security firms to investigate the hack, and had offered to let the attacker keep $125,000 if they returned the remaining funds in a bug bounty agreement that would also involve 0VIX not pursuing legal action.
Euler Finance exploited for almost $200 million
The decentralized lending platform Euler Finance suffered a flash loan attack in which an exploiter stole $197 million from the project. The attacker stole $8.7 million in the Dai stablecoin, $18.5 million in wrapped Bitcoin, $135.8 million in Lido staked Ethereum (stETH), and $33.8 million in the USDC stablecoin. Although Euler was well known for its many code audits, the project had later added a vulnerable function that had not been as heavily audited.
Euler announced that they were aware of the exploit, and were "working with security professionals and law enforcement".
On April 3, Euler Finance announced that they had completed successful negotiations, and that "all of the recoverable funds taken from the Euler protocol on March 13th have now been successfully returned by the exploiter". Unfortunately, based on on-chain transfers, this appeared to only be around $31 million.
Platypus Finance stablecoin exploited for $8.5 million ten days after launch
Platypus USD, a stablecoin issued by the Platypus Finance defi protocol, was exploited only ten days after it first launched. The loss was estimated to be around $8.5 million, although crypto researcher zachxbt observed that Tether had blacklisted the attacker contract shortly after the theft.
The exploit was a flash loan attack that allowed them to drain some protocol pools, also causing the stablecoin to lose its dollar peg and drop to around $0.48. A team member reported on the project's Discord that "all operations are paused until we get more clarity".
The following day, the project reported they had recovered $2.4 million of the stolen funds, and were working with crypto sleuth zachxbt, who had leads as to the hacker's identity. Later that month, Platypus announced that French police had arrested two suspects, who had tried to withdraw stolen funds through Binance — to whom they had submitted identification documents for KYC purposes.
dForce Network exploited for $3.65 million, funds returned
An attacker using flash loans to exploit a common re-entrancy vulnerability siphoned $3.65 million from the dForce defi project on both Arbitrum and Optimism, which are Ethereum layer-2 networks. The exploit, which involves manipulating the oracle price in Curve liquidity pools, is a common one that was first reported to Curve in April 2022 and disclosed in October 2022. It has been used to attack various other projects, including QiDAO.
dForce contacted the hacker via blockchain transaction, offering to negotiate a bounty. Several days later, the project tweeted that the attacker had "c[o]me forward as a whitehat", and that the funds had been fully returned. "We have agreed to offer a bounty and will drop all on-going investigation and law enforcement actions," they announced.
DFX Finance suffers $5 million loss
An attacker was able to use a flash loan to exploit a vulnerability in the smart contract for DFX Finance, a decentralized forex trading platform. The platform suffered a loss amounting to around $5 million. The attacker subsequently laundered the funds through the Tornado Cash cryptocurrency tumbler. The attacker didn't make off with the entire amount lost from the platform, partly due to an MEV bot snagging a significant amount of the funds.
Earning.Farm exploited for $971,000, exploiter gets frontrun by MEV bot
The defi project Earning.Farm lost 748 ETH (~$971,000) to a hacker using a flash loan attack. The project contract was missing a check that a flash loan was initiated by the protocol, so the attacker was able to instruct the project to withdraw large amounts of funds, which they then were able to transfer to themselves.
Amusingly, one of the transactions by the hacker was frontrun by a MEV bot known as 0xa57, which made a tidy 480 ETH (~$623,000) from the attack. The second transaction succeeded, landing the attacker 268 ETH (~$348,000). According to a MEV researcher, 0xa57 has been known to return funds that were obtained as a result of a hack.
More than $1.1 million stolen from Sovryn defi protocol
Bitcoin-based defi protocol, Sovryn, lost $1 million to a price manipulation attack. An exploiter was able to use the project's legacy lend and borrow functionality to maliciously withdraw 44.93 RBTC (~$915,000) and 211,045 USDT.
According to the protocol, their developers "were able to identify and recover funds as the attacker was attempting to withdraw the funds". They have also announced that Exchequer, the project's treasury committee, would "reinject" the remaining stolen funds.
- "Bitcoin Defi Protocol Sovryn Gets Hacked for Over $1 Million", CryptoPotato
- "Interim Exploit Update", Sovryn
New Free DAO loses $1.25 million in flash loan attack
A flash loan attack against the New Free DAO project resulted in a $1.25 million loss. The project's token also crashed 99% in the wake of the theft. The hacker quickly sent 1,500 BNB (~$415,000) of the stolen funds through the Tornado Cash cryptocurrency mixer, and sent another 2,900 (~$803,000) to the PancakeSwap decentralized exchange.