Quark Lab is a controversial team specializing in the development of crypto-draining scripts and tools. Their products target wallet vulnerabilities across popular blockchain networks like Ethereum, Solana, and Tron, leveraging social engineering and phishing techniques. Quark Lab offers a range of 'stealers' for different operating systems including Windows and macOS. They provide their clients with source code and detailed setup instructions for deploying crypto drainer, promising fast updates and reliable support. With a focus on exploiting high-end segments and a community of over 140 members, they claim to have drained over $84M.