In early 2023, the U.S. and its Five Eyes allies began alleging that a Chinese state-sponsored hacker called “Volt Typhoon” was deviously leaving undetectable “scripts” (rather than detectable files) that “live off the land” (use resources within the host computer system), and “hide in plain sight.” They lurked in the digital networks of key U.S. transport, utility and other infrastructures, waiting to strike at an opportune moment.
