Once attackers had gained access via the outdated operating system, they used this software to remotely access the desktop and modify the sodium hydroxide levels. It is believed the attackers used these passwords to gain access via TeamViewer. A recent data breach database that was leaked in 2017 contained passwords that matched the domain of ci.oldsmar.fl.us. All the computers on the network that used TeamViewer utilized the same password and allowed anyone from the internet to access these systems. The computers had also been utilizing TeamViewer, a remote access software, to administer the machines as needed and respond to alerts. This resulted in unauthorized access to the systems. Attackers were able to compromise the computers due to the outdated systems which are affected by multiple known vulnerabilities. This is an outdated, unsupported operating system which had not received any updates in over a year. The water treatment plant is running Windows 7 operating system on its computers.
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