A supply chain attack on the Ledger connector application has rippled throughout the world of decentralized apps, which widely use the software to enable people to connect their popular Ledger hardware wallets to perform transactions. Although hardware wallets are meant to be among the most secure ways to store crypto, they too are vulnerable to attacks when they are connected to perform transactions.A hacker was able to obtain access to Ledger's source code management tool and push out a new release that contained code that would drain wallets as users connect them. Because the library is so widely used, many crypto applications were vulnerable — including Revoke.cash, a security-focused project intended to help people guard against attacks on their wallets.CTO of the Sushi crypto project issued a broad warning: "Do not interact with ANY dApps until further notice." At least $600,000 has been drained from multiple users so far.