Houston-based Waste Management , one of the largest waste disposal companies in the US, cut ties with an IT contractor back in 2021 for reasons unknown. The 35-year-old man—an Ohio resident named Maxwell Schultz—then took revenge using his IT knowledge.

Though he lost his own access to his former client’s network after his contract was terminated, Schultz regained access using a dubious method: posing as another contractor. He obtained those login details and used them to access the network once again.

Once inside, Schultz reset the passwords of around 2,500 employees and other contractors, according to Chron . The locked-out users were scattered across the country and could no longer work.

Schultz also looked for ways to delete several system log files, which he did by running a Po

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