Jul 10, 2025
1 new drain.
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Fake Solidity extension for the Cursor AI code editor leads to about $500K crypto theft from a developer
Kaspersky reported on 10 July 2025 that a blockchain developer lost about $500,000 in crypto after installing a fake Solidity extension in Cursor, an AI code editor built on VS Code that gets extensions from the Open VSX registry. The extension gave no Solidity support; it installed ScreenConnect remote-access software, then the Quasar backdoor and a stealer that took browser, email and wallet data, including seed phrases. The attackers used the seed phrases to drain the developer's wallets. Developers should vet editor extensions and never keep seed phrases or funded keys on a coding machine.
Cursor AI code editor users (Open VSX extensions)·Multiple EVM chains·$500K stolen·Since Jul 10, 2025·