Incident All ledgers
LuBian: $3.50bn
LuBian lost $3.50bn on 28 December 2020. Ranked 2nd of 1,272 crypto failures, with method, returned funds and comparable incidents.
- Date
- 28 December 2020
- Lost
- $3.50bn
- Returned or repaid
- None recorded
- Target
- Other
- Category
- Key Compromise
- Method
- Weak Key Generation
- Chains
- Bitcoin
On December 28, 2020, an attacker exploited weak private key generation at the LuBian Bitcoin mining pool, brute-forcing keys and taking 127,426 BTC, valued at about $3.5 billion.
Against the ledger
- It ranks 2nd of the 1,272 incidents with a known loss, and 1st in 2020.
- It accounts for 98.4% of the $3.56bn in known losses in December 2020.
- 153 incidents in the ledger are classified as Key Compromise, for $8.96bn in total. This one is 39.1% 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 | — |
| 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 | — |
All failures in 2020 · 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, “LuBian, failures ledger”, data to 2 November 2026, https://bitminer.io/ledger/incident/lubian-2020-12-28/. How this is built