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Water Saci Hackers Leveraging AI Tools to Attack WhatsApp Web Users

ID: 38bb806a-5731-5e98-be4a-167457c24bc5

STIX ID: report--38bb806a-5731-5e98-be4a-167457c24bc5

Feed Name: cybersecurityNews.com

Threat Score
75/100

Date Published: 2025-12-02

Date Updated: 2026-04-21

Author: Tushar Subhra Dutta

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Water Saci is a sophisticated WhatsApp Web-based campaign targeting Brazilian users that delivers a banking trojan through malicious attachments and multi-stage installers; attackers use automation (whatz.py, chromedriver, Selenium, WA-JS) and appear to have used LLMs to convert and optimize code for cross-browser, self-propagating spread to harvest financial data.

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