Primarily macOS, affecting browsers like Safari, Chrome, and Firefox.

is a persistent browser hijacker and Potentially Unwanted Program (PUP) that primarily targets macOS users. While often referred to as a "virus," it is more accurately classified as a specialized form of adware that forcibly alters browser settings to redirect web traffic and generate revenue for its operators. Threat Overview

To redirect users through multiple intermediary domains (like searchbaron.com ) before ultimately landing on Bing.com or Yahoo. This redirect chain allows attackers to inflate traffic and collect ad revenue. Key Symptoms How To Remove Search Marquis From Your Mac - Astrill VPN

Typically spreads via "bundling" —hiding within the installers of free software, fake Flash Player updates, or deceptive "system optimization" tools.