Researchers uncovered a covert campaign called “AdFection” in which targeted online ads delivered zero-click mercenary spyware to phones and other devices without any user interaction. An Israeli ad firm called Discover-Tech operated an ad platform, Controlium, that could de-anonymize and fingerprint visitors and then steer devices to infrastructure tied to the spyware vendor Candiru. Analysis of network logs from a news outlet shows 45 devices were targeted in 2024-25, and ad-bidding records indicate Discover-Tech-linked impressions ran across more than 70,000 mobile apps and 120,000 websites, directing millions of devices to Candiru-related servers. The delivery method merges the longstanding privacy abuses of programmatic real-time bidding with rare zero-click exploits, allowing operators to compromise specific individuals simply by showing tailored ad content.
The campaign exposes a serious gap in defenses: ordinary users cannot reliably detect or block such infections except by aggressively blocking ads, and home or mobile connections lack the monitoring that revealed these attacks. Industry reactions included Google removing Discover-Tech from its ad platforms, IAB Europe suspending the firm from its global vendor list, and platform providers ejecting the company, but investigators warn that only architectural changes or rigorous vendor vetting will stop similar abuse. The attacks also touched sensitive networks - NATO, UN, government bodies and critical infrastructure - underscoring the widespread risk to privacy, national security, and the open web.
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