this post was submitted on 28 Dec 2025
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Koi Security researchers warned that the NPM package ‘Lotusbail’, a WhatsApp Web API library and fork of ‘Baileys’, has been stealing users’ credentials and data.

The package has been available for six months and has had over 56,000 downloads. Lotusbail supports sending and receiving WhatsApp messages, wrapping the legitimate WebSocket client so all messages pass through it first, enabling the malicious capture of information.

The Lotusbail npm package works as a fully functional WhatsApp API, making it hard to detect because it is based on the legitimate Baileys library. It wraps WhatsApp’s WebSocket client, intercepting credentials, messages, contacts, and media while continuing normal operations.

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