THORChain Multi-Chain Sync Hacked! $10.8M Evaporated, Trading Fully Suspended, RUNE Plunges 12%

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Cross-chain liquidity protocol THORChain suffered a synchronized multi-chain attack on Friday, losing approximately $10.8 million across four chains: Bitcoin, Ethereum, BNB Chain, and Base. The protocol urgently suspended all trading and signing operations, and the native token RUNE promptly plunged about 12%. (Background: Has DeFi become a hacker's playground? 13 attacks in one month, $630 million swept away) (Background context: Aftermath of Kelp DAO's $290 million theft: Lido releases latest compensation plan, Earn users receive full protection, vault about to restart) Cross-chain liquidity protocol THORChain suffered a synchronized multi-chain attack on Friday (5/15). On-chain detective ZachXBT and security firm PeckShield almost simultaneously detected suspicious fund movements across four chains—Bitcoin, Ethereum, BNB Chain, and Base—with estimated losses of approximately $10.8 million. The THORChain team subsequently urgently suspended all trading and signing operations, and the native token RUNE plunged about 12% after the news broke. According to on-chain tracking, wallets associated with the attacker currently hold approximately 3,443 ETH, 36.85 BTC, and 96.6 BNB. The synchronized draining across four chains indicates that the attacker targeted not a contract vulnerability on a single chain, but rather a common weakness at THORChain's cross-chain routing layer. This is not the first time THORChain has been attacked. In July 2021, THORChain suffered two consecutive attacks within one week, losing approximately $5 million and $8 million respectively, with the attacker in the second incident even claiming in an attached transaction message that it was to "teach the team a lesson." Including this incident, THORChain has experienced at least three major security incidents in recent years. As of press time, THORChain has not yet released a post-mortem report, and the attack vector is still under investigation. For a protocol managing multi-chain liquidity pools, each downtime means interruption of cross-chain swap channels, directly impacting aggregators and frontends that rely on its routing. Cross-chain bridges and liquidity protocols have consistently been the hardest-hit area in DeFi security. Since 2021, such protocols have cumulatively been stolen from in excess of $2.8 billion, from Ronin Bridge's $625 million to Wormhole's $320 million, with cross-chain infrastructure repeatedly becoming a priority target for attackers. The reason is not hard to understand: cross-chain protocols must simultaneously maintain state consistency across multiple chains, and their attack surface is inherently far larger than that of single-chain contracts. Four chains, one drain, ten million dollars. THORChain has stopped the bleeding by suspending trading, but until the post-mortem comes out, the market won't know how deep this wound is, nor whether another blow is coming. How much did THORChain lose in this hack? Approximately $10.8 million, with the attack spanning four chains: Bitcoin, Ethereum, BNB Chain, and Base. The attacker's wallets currently hold approximately 3,443 ETH, 36.85 BTC, and 96.6 BNB, and the protocol has urgently suspended all trading. Has THORChain experienced security incidents before? Yes. In July 2021, THORChain suffered two consecutive attacks within one week, losing approximately $5 million and $8 million respectively. Including this incident, there have been at least three major security incidents in recent years, and cross-chain bridges have cumulatively been stolen from in excess of $2.8 billion since 2021.

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