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New Fake AV Page Uses Firefox Internals

ID: 8c942355-3f1b-580d-9812-9259f8bc006d

STIX ID: report--8c942355-3f1b-580d-9812-9259f8bc006d

Feed Name: Zscaler Security Research Blog

Threat Score
50/100

Date Published: 2025-04-02

Date Updated: 2026-05-01

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This report documents a Fake AV campaign that delivers a malicious installer (InstallInternetDefender_722.exe, ~9.5% VT detection) and uses browser-specific UI elements to present convincing fake security warnings across Internet Explorer, Firefox, Chrome and Safari, increasing the likelihood of user deception.

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