ZKsync, a blockchain project maintained by Matter Labs, successfully recovered nearly $5.7 million in stolen ZK tokens following a hack that exploited an airdrop contract vulnerability on April 15, 2025. The hacker cooperated with the ZKsync Association, returning the funds within the safe harbor deadline and accepting a 10% bounty as a reward. Matter Labs, which operates as the sole sequencer for the ZKsync Era chain, intervened by restricting 70% of the stolen tokens from further transfer, aiding in the recovery process. The ZKsync Association, the ZKsync Foundation, and Matter Labs have concluded their investigation and published a final report, expressing gratitude to their technical partners, security experts, exchanges, and the community for their support during the incident.