And then there was Nimda, an attack that slowed the internet to a crawl. Nimda took advantage of an unpatched Microsoft bug to infect everything in its reach—email, servers, hard drives—and then happily reinfected everything it had already hit. It had only taken twenty-two minutes for Nimda to become the worst cyberattack of its time. The tech-research firm Gartner warned Microsoft customers to “run, don’t walk, away” from Microsoft’s web server software. Nimda’s timing—just one week after 9/11—caused government officials to suspect cyberterrorists. A line in the code—“R.P. China”—pointed to
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