Incident All ledgers
NiceHash: $64.0m
NiceHash lost $64.0m on 8 December 2017. Ranked 58th of 1,272 crypto failures, with method, returned funds and comparable incidents.
- Date
- 8 December 2017
- Lost
- $64.0m
- Returned or repaid
- None recorded
- Target
- CEX
- Category
- Frontend & Infrastructure
- Method
- Key Leaked via Infrastructure
- Chains
- Bitcoin
In December 2017, attackers used phishing to obtain employee credentials and compromised NiceHash's payment wallet, stealing over 4,700 BTC (about $64M). NiceHash finished repaying affected users by December 16, 2020.
Against the ledger
- It ranks 58th of the 1,272 incidents with a known loss, and 2nd in 2017.
- It accounts for 97.9% of the $65.4m in known losses in December 2017.
- 93 incidents in the ledger are classified as Frontend & Infrastructure, for $7.49bn in total. This one is 0.9% of that.
- The ledger records no returned funds.
Closest in size by the same method
| Date | Target | Lost | Type | Method | Returned |
|---|---|---|---|---|---|
| 02 Dec 2021 | Badger DAO | $120.0m | DeFi Protocol | CDN Compromise | — |
| 03 Jun 2023 | Atomic Wallet | $100.0m | Wallet | Supply Chain Attack | — |
| 09 Oct 2026 | Ledger (Supply Chain) | $93.0m | Wallet | Supply Chain Attack | — |
| 09 Sept 2025 | SwissBorg | $41.5m | CEX | API Key Compromised | — |
| 12 Feb 2022 | IRA Financial / Gemini | $36.0m | CEX | API Key Compromised | — |
All failures in those years · 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, “NiceHash, failures ledger”, data to 2 November 2026, https://bitminer.io/ledger/incident/nicehash-2017-12-08/. How this is built