Decentralized finance (DeFi) protocol yearn.finance‘s YFI dropped more than USD 4,000 after one of its DAI lending pools was drained of USD 11m in an exploit. (Updated at 15:48 UTC with Yearn’s vulerability disclosure, Paolo Ardoino’s tweet, the lates price data.)
Yearn’s YFI governance token saw an abrupt USD 4,190 drop last night. Though the price has increased somewhat, it’s still lower than yesterday’s levels. YFI is currently (15:47 UTC) trading at USD 32,671. It dropped 2.7% in the past 24 hours, while it’s still green in a week, appreciating 10%.
Following the attack, UniWhales DAO account started reporting large sales of YFI for ETH.
According to DeFi Pulse, Yearn’s total value locked saw a 3.5% drop since yesterday – from USD 507.8m to the current USD 490.5m.
“We have noticed the v1 yDAI vault has suffered an exploit. The exploit has been mitigated. Full report to follow,” wrote yearn.finance in their tweet last night.
Per a post from Yearn’s core developer, banteg, the attacker took USD 2.8m, while the vault lost USD 11m.
debalance the exchange rate between stablecoins in Curve’s 3CRV pool; make the yDAI vault deposit into the pool at an unfavorable exchange rate; reverse the imbalance caused in step 1; repeate this pattern in a series of 11 transactions executed over 38 minutes before being mitigated.
The report stated that “deposits into the strategy were effectively disabled, preventing further exploits from taking place.”
Meanwhile, stolen USDT 1.7m have been frozen, announced Tether Chief Technology Officer Paolo Ardoino.
This is a truly impressive incident reaction btw. Gathering all the multisig signers in 10 min is really, really good! https://t.co/5Sg7Fg9AHT
— Curve Finance (@CurveFinance) February 5, 2021
This is far from the only exploit targeting DeFi platforms in the past year. Just recently, an exploit has been reportedly discovered on DeFi protocol yCredit launched by Yearn Finance Founder Andre Cronje. He did, however, warn that yCredit is experimental and can be “economically exploited.”
And millions were lost in multiple attacks last year, such as those on Value DeFi, bzx, Balancer, Akropolis, Harvest Finance, and others.
Meanwhile, CipherTrace, a crypto intelligence firm, recently said that DeFi-related crime is on the rise, and claimed that fraud still accounted for a whopping 73% of all crypto crime.
At the end of last year, industry insiders predicted that attacks on DeFi platforms and protocols — particularly new ones — will rise in 2021.
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