Incident All ledgers
Coincheck: $534.0m
Coincheck lost $534.0m on 26 January 2018. Ranked 7th of 1,272 crypto failures, with method, returned funds and comparable incidents.
- Date
- 26 January 2018
- Lost
- $534.0m
- Returned or repaid
- None recorded
- Target
- CEX
- Category
- Key Compromise
- Method
- Hot Wallet Key Compromised
- Chains
- NEM
Coincheck said on January 26, 2018 that hackers took 523 million NEM coins, worth about $534 million, from a poorly secured hot wallet. The exchange started repaying roughly 260,000 affected users.
Against the ledger
- It ranks 7th of the 1,272 incidents with a known loss, and 1st in 2018.
- It accounts for 100.0% of the $534.0m in known losses in January 2018.
- 153 incidents in the ledger are classified as Key Compromise, for $8.96bn in total. This one is 6.0% of that.
- The ledger records no returned funds.
Closest in size by the same method
| Date | Target | Lost | Type | Method | Returned |
|---|---|---|---|---|---|
| 23 Mar 2022 | Ronin Bridge | $624.0m | DeFi Protocol | Validator 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 2018 · 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, “Coincheck, failures ledger”, data to 2 November 2026, https://bitminer.io/ledger/incident/coincheck-2018-01-26/. How this is built