MANTRA Chain published a full post-mortem on Aug. 28 for the Aug. 20-21 exploit, which released roughly 720.9 million MANTRA worth about $3.6 million from addresses outside the circulating supply. The project attributed the breach to an unsigned-integer accounting flaw in a shared cosmos/evm module used to run Ethereum-style contracts on the Cosmos SDK, rather than to its own code. MANTRA said no validator keys, governance controls or multisig signers were compromised, and that the attacker needed only a permissionlessly deployed contract and a self-funded wallet. Law enforcement is involved, but the report stopped short of committing to a fund-recovery plan. MANTRA said it will update circulating-supply figures once it better understands tokens held in hacker wallets and any possible recovery. The team missed rogue transactions during the first four hours, and validators halted the network at 23:13 UTC before restarting it at 05:26 UTC on Aug. 22 after 30 hours and 13 minutes offline. The token fell 18.5% to a record low near $0.004126 during the halt before recovering, adding to the project’s difficult 18 months after its former OM token lost more than 90% in one April 2025 session and erased over $5 billion in value.