ZKsync confirmed that the hacker cooperated and returned the funds within the “safe harbor” deadline, claimed the 10% bounty, and no further action will be taken against the attacker

Event date

April 23, 2025

Quotes that support claims

The agreement was contingent on the full return of funds by the stated deadline. ZKSync confirmed the resolution of the matter with the assets successfully transferred, adding that it won’t take further action against the attacker.

In a post on X, the project said the hacker cooperated with the team and returned the funds within the “safe harbor” deadline — a grace period commonly offered in security incidents to incentivize returns without legal consequence. The cooperation means the hacker took a 10% bounty.

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Week 17 of 2025