This really could have turned out much worse though, given that if they had done it at a better time it could have gone unnoticed and caused deaths. Guessing it was probably an irate employee, but if they really left it this insecure it wouldn't surprise me that someone left it on a post-it note and left it in plain site of the public. To have an unpatched outdated system, connected to a critical system and then further to have TeamViewer installed sharing the username and password.really hope that someone loses their job and goes to jail for this level of incompetence.

Further, all computers shared the same password for remote access and appeared to be connected directly to the Internet without any type of firewall protection installed. All computers used by water plant personnel were connected to the SCADA system and used the 32-bit version of the Windows 7 operating system.

The unidentified actors accessed the water treatment plant’s SCADA controls via remote access software, TeamViewer, which was installed on one of several computers the water treatment plant personnel used to conduct system status checks and to respond to alarms or any other issues that arose during the water treatment process.

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