Incident All ledgers
BigONE: $27.0m
BigONE lost $27.0m on 16 July 2025. Ranked 106th of 1,272 crypto failures, with method, returned funds and comparable incidents.
- Date
- 16 July 2025
- Lost
- $27.0m
- Returned or repaid
- None recorded
- Target
- CEX
- Category
- Frontend & Infrastructure
- Method
- Supply Chain Attack
- Chains
- Bitcoin, BSC, Ethereum, Solana, TRON
On July 16, 2025, an attacker used a supply chain compromise to reach BigONE's production systems and altered backend logic so fraudulent withdrawals were auto-approved, draining about $27 million across five blockchains before detection.
Against the ledger
- It ranks 106th of the 1,272 incidents with a known loss, and 14th in 2025.
- It accounts for 18.7% of the $144.2m in known losses in July 2025.
- 93 incidents in the ledger are classified as Frontend & Infrastructure, for $7.49bn in total. This one is 0.4% of that.
- The ledger records no returned funds.
Closest in size by the same method
| Date | Target | Lost | Type | Method | Returned |
|---|---|---|---|---|---|
| 12 Jul 2019 | BitPoint | $27.6m | CEX | Key Leaked via Infrastructure | — |
| 18 Feb 2024 | FixedFloat | $26.1m | DeFi Protocol | Key Leaked via Infrastructure | — |
| 18 Nov 2023 | Kronos Research | $26.0m | Other | API Key Compromised | — |
| 10 Sept 2024 | Indodax | $25.2m | CEX | Key Leaked via Infrastructure | — |
| 21 Mar 2026 | Resolv USR | $24.5m | DeFi Protocol | Key Leaked via Infrastructure | — |
All failures in 2025 · 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, “BigONE, failures ledger”, data to 2 November 2026, https://bitminer.io/ledger/incident/bigone-2025-07-16/. How this is built