- Symbiosis recovered 15 Bitcoin (worth ~$1.1 million) from a Friday exploit of its native Bitcoin bridge.
- The attacker minted 46.1 billion unbacked tokens but realized net proceeds of only 4.3 Wrapped Bitcoin (WBTC), worth $336,000.
- Symbiosis is now offering a 20% bounty for information leading to asset recovery after a white-hat bounty deadline expired.
- Blockchain security company Blockaid flagged the exploit, while DefiLlama estimates losses at $336,000.
Cross-chain liquidity protocol Symbiosis recovered 15 Bitcoin worth approximately $1.1 million from a Bitcoin bridge exploit that occurred on Friday, according to a Friday X post. The funds were moved to a team-controlled multi-sig wallet, while the protocol’s native Bitcoin bridge remains paused.
The attacker’s address minted 46.1 billion unbacked tokens but realized net proceeds of only 4.3 Wrapped Bitcoin (WBTC), worth $336,000, according to blockchain security company Blockaid, which flagged the exploit on Friday. The protocol has not clarified how the recovered 15 Bitcoin relates to the $336,000 in proceeds attributed to the attacker.
Symbiosis is now offering a 20% bounty to anyone providing information that leads to asset recovery. The protocol initially offered a 20% white-hat bounty for the attacker to return the funds, but the deadline expired on Sunday.
According to DefiLlama, roughly $336,000 was lost in the exploit. The protocol has yet to release its final accounting of total losses, though it stated it will reveal a compensation framework for affected liquidity providers.
Bridge exploits continue testing the DeFi sector. In June, Secret Network suffered an “infinite mint” exploit that drained about $4.6 million. In May, the Verus-Ethereum bridge was drained in a forged cross-chain transfer exploit for 5,402 Ether, then worth about $11.6 million. The Hacker returned 75% of those funds after the protocol offered a 25% white-hat bounty.
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