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When the malware known both as Triton and Trisis came to light in late 2017, it quickly gained a reputation as perhaps the world's most dangerous piece of code: the first ever designed to disable the safety systems that protect industrial facilities from potentially lethal physical accidents. But Triton hackers still have to engage in a far more common forms of hacking to plant that code, in some cases spending close to a year digging their way through IT networks before they reach their targets.