Incident All ledgers
Ronin Bridge: $624.0m
Ronin Bridge lost $624.0m on 23 March 2022. Ranked 4th of 1,272 crypto failures, with method, returned funds and comparable incidents.
- Date
- 23 March 2022
- Lost
- $624.0m
- Returned or repaid
- None recorded
- Target
- DeFi Protocol
- Category
- Key Compromise
- Method
- Validator Key Compromised
- Chains
- Ethereum
In March 2022 attackers compromised private keys for 5 of the Ronin bridge's 9 validators and approved fraudulent withdrawals of 173,600 ETH and 25.5 million USDC, about $624M; the breach went unnoticed for six days.
Against the ledger
- It ranks 4th of the 1,272 incidents with a known loss, and 1st in 2022.
- It accounts for 87.8% of the $710.6m in known losses in March 2022.
- 153 incidents in the ledger are classified as Key Compromise, for $8.96bn in total. This one is 7.0% of that.
- The ledger records no returned funds.
Other incidents named Ronin
| Date | Target | Lost | Type | Method | Returned |
|---|---|---|---|---|---|
| 06 Aug 2024 | Ronin Bridge | $12.0m | DeFi Protocol | Uninitialized Proxy | — |
Closest in size by the same method
| Date | Target | Lost | Type | Method | Returned |
|---|---|---|---|---|---|
| 26 Jan 2018 | Coincheck | $534.0m | CEX | Hot Wallet Key Compromised | — |
| 07 Feb 2014 | Mt. Gox | $470.0m | CEX | Private Key Compromised | — |
| 24 Sept 2026 | Bitget | $387.0m | CEX | Hot Wallet Key Compromised | — |
| 09 Feb 2024 | PlayDapp | $290.0m | DeFi Protocol | Hot Wallet Key Compromised | — |
| 29 Sept 2020 | KuCoin | $281.0m | CEX | Hot Wallet Key Compromised | — |
All failures in 2022 · The failures ledger
Amounts are DefiLlama’s estimates and can change as incidents are revalued. Its returned figure can include money a company repaid itself, not only funds recovered from attackers. Source: DefiLlama.
Cite this Bitminer.io, “Ronin Bridge, failures ledger”, data to 2 November 2026, https://bitminer.io/ledger/incident/ronin-bridge-2022-03-23/. How this is built