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Agent.BTZ: The USB Worm That Slipped Past the World’s Most Secure Networks In an era before zero-day exploits dominated headlines, one deceptively simple piece of malware exposed a massive blind spot in global cybersecurity: the humble USB drive.  Known as Agent.BTZ, this worm didn’t rely on sophisticated remote exploits or phishing campaigns—it spread through something far more ordinary: human behaviour. The Infection That Shocked the Military Agent.BTZ first gained notoriety in 2008 when it infiltrated systems within the United States Department of Defense. The breach reportedly began when an infected USB flash drive was inserted into a military laptop—possibly at a base in the Middle East. From there, the worm quietly spread across both classified and unclassified networks. It collected data, opened backdoors, and communicated with external servers, all while evading immediate detection. For an organisation with some of the most advanced cybersecurity infrastructure in the world...