Ontology resumed normal mainnet operation on Sept. 2 after pausing block production on Aug. 31 because of malicious activity targeting the network. It requires every sync-node operator to upgrade to version 3.1.5, confirm full synchronization and verify normal operation. The release includes a Linux AMD64 binary and checksum, disables registrations for several legacy native contracts at block 20,770,894, and follows a parent commit changing cross-chain message deserialization. Ontology said its investigation found no compromise of user assets, but it has not published an independent forensic report, identified the vulnerability or attacker method, or established recovery across RPC providers, exchanges, wallets and dapps. Monitoring will continue with technical and security partners.