Beyond typical BMS functions, hospitals operate a myriad of interdependent critical systems, and are required to operate in preparedness mode in case of a mega-event — so OT network up-time is crucial.
However, many hospital systems, including the one described in this case study, were not designed with cyber-security in mind:
* No OT-IT segmentation and no visibility into the OT network
* Lack of segmentation between buildings ,facilities and systems.
* Separate operational monitoring interfaces for different systems
* No procedures in place for patching or hardening devices
* No system for securing and logging maintenance operations
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