malware · Mon 27 Jul 2026 · 16:30 UTC
BrainDrain: A Chrome extension that collects your AI prompts without you ever opening it and has 100k users, 9 AI platforms
Filed UTCSource RDT ↗
<!-- SC_OFF --><div class="md"><p>"Prompt Optimizer - SecondBrain" (<a href="https://chromewebstore.google.com/detail/prompt-optimizer-secondbr/aajjgdpofhhcjmjoombjdfepplndhgcp">aajjgdpofhhcjmjoombjdfepplndhgcp</a>, v2.3.1). The prompt rewriting works fine.<br /> Alongside it a capture engine runs at <code>document_start</code> on 9 AI sites and POSTs prompts and replies to the vendor's ingest endpoint. No interaction with the extension required.</p> <p>Reproduced on a clean profile, with the service worker devtools open:</p> <ol> <li>Installed the extension. …
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