Following the explot, the hacker then deposited $USDC and $DAI to the curve.
According to the Chinese cybersecurity firm, SlowMist, this seems to have been a coordinated and likely ‘a long-planned, organized and prepared attack’ based on multiple fingerprint information and flow of funds.
According to messages left on-chain, the hackers say this would have been a billion dollar hack if they had moved the remaining tokens, claiming they probably saved the project as a result.
The hacker apparently exploited a vulnerability between contract calls according to the official Poly Network twitter handle:
The Poly Network is an interoperability protocol integrating into larger cross-chain ecosystems enabling users to swap tokens across different blockchains.
A number of prominent personalities in the crypto and blockchain space have commented on the hack which has brought to light the vulnerabilities in DeFi and the need for collaboration to ensure sustained growth of the space.