The $500M Club: Top 3 Heists

Ronin ($624M), Poly Network ($611M), and BNB Bridge ($586M) — all cross-chain bridges, all in 2021-2022.

The top 3

  1. Ronin Network — $624M: Axie Infinity's bridge fell when hackers seized 5 of 9 validator keys; the FBI blamed North Korea's Lazarus Group.
  2. Poly Network — $611M: Drained across three chains in August 2021 — still the single largest DeFi exploit of that year.
  3. BNB Bridge — $586M: Attacker forged a proof to mint 2M BNB; BNB Chain halted the network to freeze most of the loot.

Sources

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