A new advisory offering details on a remote hacker’s attempted sabotage of an Oldsmar, Florida city water treatment plant has revealed a disregard for certain basic cyber hygiene best practices among employees.

Experts say it’s an indicator that operators of critical infrastructure could use a serious infusion of security controls. However, due to budget restrictions, these controls may first require a thorough risk assessment and prioritization exercise.

When the Feb. 5 incident was first disclosed last Monday, it was reported that a malicious actor exploited remote access software – later identified as TeamViewer – to hijack plant controls and then tried increase the amount of lye in the water to dangerous levels.

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