Incident All ledgers
BXH: $139.0m
BXH lost $139.0m on 30 October 2021. Ranked 31st of 1,272 crypto failures, with method, returned funds and comparable incidents.
- Date
- 30 October 2021
- Lost
- $139.0m
- Returned or repaid
- None recorded
- Target
- DeFi Protocol
- Category
- Key Compromise
- Method
- Private Key Compromised
- Chains
- BSC
BXH lost about $139 million after an attacker obtained its administrative private key and signed a transfer of tokens to their own account. The record suggests a likely insider or targeted malware compromise of the key storage, but this is not confirmed.
Against the ledger
- It ranks 31st of the 1,272 incidents with a known loss, and 5th in 2021.
- It accounts for 31.0% of the $449.0m in known losses in October 2021.
- 153 incidents in the ledger are classified as Key Compromise, for $8.96bn in total. This one is 1.6% of that.
- The ledger records no returned funds.
Closest in size by the same method
| Date | Target | Lost | Type | Method | Returned |
|---|---|---|---|---|---|
| 04 Dec 2021 | BitMart | $196.0m | CEX | Hot Wallet Key Compromised | — |
| 13 Dec 2021 | Vulcan Forged | $140.0m | DeFi Protocol | Hot Wallet Key Compromised | — |
| 07 Jul 2023 | Multichain | $126.0m | DeFi Protocol | Validator Key Compromised | — |
| 31 Jul 2026 | COLDCARD | $116.0m | Wallet | Weak Key Generation | — |
| 23 Jun 2022 | Harmony Bridge | $100.0m | DeFi Protocol | Validator Key Compromised | — |
All failures in 2021 · 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, “BXH, failures ledger”, data to 2 November 2026, https://bitminer.io/ledger/incident/bxh-2021-10-30/. How this is built