Incident All ledgers
BitGrail: $170.0m
BitGrail lost $170.0m on 12 February 2018. Ranked 26th of 1,272 crypto failures, with method, returned funds and comparable incidents.
- Date
- 12 February 2018
- Lost
- $170.0m
- Returned or repaid
- None recorded
- Target
- CEX
- Category
- Access Control
- Method
- Improper Access Control
- Chains
- Nano
In February 2018 the BitGrail exchange lost about 17M Nano (roughly $170M) after attackers exploited a withdrawal flaw that let the same funds be withdrawn repeatedly, draining hot wallets over an extended period.
Against the ledger
- It ranks 26th of the 1,272 incidents with a known loss, and 3rd in 2018.
- It accounts for 100.0% of the $170.0m in known losses in February 2018.
- 225 incidents in the ledger are classified as Access Control, for $1.96bn in total. This one is 8.7% of that.
- The ledger records no returned funds.
Closest in size by the same method
| Date | Target | Lost | Type | Method | Returned |
|---|---|---|---|---|---|
| 01 Apr 2026 | Drift Trade | $295.0m | DeFi Protocol | Proxy Upgrade Hijack | — |
| 09 Nov 2017 | Parity Multisig | $150.0m | DeFi Protocol | Uninitialized Proxy | — |
| 08 Oct 2021 | Mirror | $90.0m | DeFi Protocol | Improper Access Control | — |
| 01 Apr 2025 | UPCX | $70.0m | DeFi Protocol | Proxy Upgrade Hijack | — |
| 26 Mar 2024 | Munchables | $62.5m | Gaming | Proxy Upgrade Hijack | — |
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, “BitGrail, failures ledger”, data to 2 November 2026, https://bitminer.io/ledger/incident/bitgrail-2018-02-12/. How this is built