A crypto drainer is a malicious tool, script, or website designed to steal cryptocurrency from victims’ digital wallets without their consent. Cybercriminals often use crypto drainers in phishing attacks, fake airdrops, or fraudulent decentralized applications (dApps). When a victim interacts with a drainer, it tricks them into authorizing transactions that transfer funds from their wallet to the attacker’s address. Crypto drainers can exploit wallet permissions, smart contract vulnerabilities, or social engineering tactics. They are a significant threat in the Web3 ecosystem, targeting both inexperienced and seasoned users. Protecting against crypto drainers involves verifying dApps, scrutinizing transaction permissions, and using trusted security tools.