Summary
UwU Lend is an Ethereum-based DeFi lending protocol forked from Aave V2, launched in September 2022 and operated by Michael Patryn (known pseudonymously as 0xSifu), a co-founder of the collapsed Canadian crypto exchange QuadrigaCX and a convicted felon. In June 2024, the protocol was exploited twice by the same attacker — first for approximately $19.3 million on June 10 and again for $3.7 million on June 13 — via oracle price manipulation using flash loans, bringing combined losses to approximately $23 million.
Connected Entities
1 entitiesTimeline(9 events)
2022-01-27
ZachXBT publicly identifies 0xSifu as Michael Patryn, co-founder of QuadrigaCX; Wonderland community votes to remove him from treasury management role
2022-02-01
Patryn returns to Wonderland following an informal community vote
2022-09-01
UwU Lend launches on Ethereum mainnet, forked from Aave V2, founded by Michael Patryn (0xSifu)
2024-06-10
First exploit: Attacker (0x841ddf093f5188989fa1524e7b893de64b421f47) manipulates UwU Lend's sUSDe oracle via Curve Finance spot prices using a ~$3.796 billion flash loan, draining approximately $19.3 million in ETH, crvUSD, bLUSD, and USDC; protocol paused by team
2024-06-11
Michael Patryn (0xSifu) offers the attacker a 20% bounty (approximately $4 million) to return stolen funds; team announces vulnerability patched
2024-06-13
Second exploit: Same attacker uses residual sUSDe collateral from first hack to drain uDAI, uWETH, uLUSD, uFRAX, uCRVUSD, and uUSDT pools for an additional $3.7 million; combined losses reach approximately $23 million
2024-06-14
Protocol reports repayment of approximately $9.7 million in bad debt; attacker does not return funds
2024-06-15
Attacker transfers approximately 1,000 ETH (roughly $3.66 million) to Tornado Cash in initial laundering tranche
2024-10-09
Linked attacker address launders an additional 2,009 ETH through Tornado Cash; total laundered by associated addresses reaches approximately 6,353 ETH
Decision Log
- hash: 8JkJhRyb95iDM2UnwH9tMrdpG4cwKyjEhKnAgLkhvtdJ
This investigation is cryptographically anchored to the Solana blockchain and source URLs are archived via the Internet Archive.
model: claude-sonnet-4-5
generated: 5/4/2026, 2:54:31 AM
last updated: 5/20/2026, 4:21:59 AM
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