🕵️‍♂️ DeFi platform Wintermute's $160M hack was likely an inside job, according to on-chain sleuth Librehash. The exploit involved a bug in a smart contract used for generating vanity wallet addresses. Wintermute rejected the theory, while blockchain security firm BlockSec deemed the report unconvincing. Proving inside jobs in DeFi hacks is challenging due to blockchain anonymity and privacy-enhancing services. However, insiders have knowledge advantages, making them prime suspects in many DeFi hacks.