In the final hours of 2023, cross-chain bridge Orbit Chain, which holds strong ties to the Klaytn ecosystem, suffered a hack that drained $81.5 million from the protocol across several transactions.

Following the exploit, the funds remained unmoved until Saturday, at which point the individual or organization responsible for the hack began to move about $48 million to Ethereum-based crypto mixing service Tornado Cash, as noted by Arkham Intelligence on X.

It is unclear what motivated the hacker's return from dormancy. Orbit Chain, which has recently begun to resume offering certain bridging services following the exploit, noted in an announcement that the funds had been moved. 

"Our team is currently working closely with relevant authorities to swiftly track the stolen assets and …