There had been a code download from another mining installation for the ComfortUnits, supposedly a patch purchased from a third party ComfortUnit supplier. The ComfortUnits had all flagged it as non-standard and needing review by SecSystem and the human systems analyst, but the techs who had downloaded it ordered them to apply it. It turned out to be well-disguised malware. It hadn’t affected the ComfortUnits, but had used their feeds to jump to SecSystem and infect it. SecSystem had infected the SecUnits, bots, and drones, and everything capable of independent motion in the installation had lost its mind.