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Over 2 million users Affected with Browser Hijackers

ID: 78df2123-290d-563e-bfaf-c92b265a3492

STIX ID: report--78df2123-290d-563e-bfaf-c92b265a3492

Feed Name: Cyble Blog

Threat Score
65/100

Date Published: 2025-05-21

Date Updated: 2026-07-20

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## Executive Summary Cyble Research identified three malicious Chrome extensions (WebSecurerr Browser Protection, UltraSurf Security, and Internet-Start) with combined installs exceeding two million that hijack browser search settings, redirect queries through intermediary domains (go.searchsecurer.com, smartwebfinder.com, internet-start.net), capture search keywords, display ads, and send telemetry to third-party analytics, enabling user tracking, ad fraud, and potential further abuse. The report provides extension IDs, network and code behavior, and remediation recommendations including manual removal and verifying extension authenticity.

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