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IT & OT convergence brings new cyber risks to industrial sector

Thu 18 Jul 2019
FYI, this story is more than a year old

IT and operational technology (OT) are on a journey to convergence, but that convergence must be managed with caution in order to manage cybersecurity risks that go with it. 

The risk towards industrial organisation such as the energy sector are immense – in fact the Australian Energy Market Operator says that protecting the sector is a matter of national importance.

Forescout Asia pacific and Japan senior director of systems engineering Steve Hunter comments that cyber risks against IT and OT environments have been steadily growing. Now there is a driving force by government and industry bodies to address those risks.

The Australian Energy Sector Cyber Security Framework (AESCSF), which provides a foundation for the sector to be consistently assessed and the insight to uplift cybersecurity capabilities and strengthen cyber resilience. 

“This increasing pressure is putting new demands on CIOs and CISOs in the utilities sector now tasked with protecting this entire ecosystem,” comments Hunter.

“The reality is, however, that no organisation can be expected to understand that of which they don’t know, and a key part of addressing this knowledge gap is to have complete device visibility and control across IT and OT.”

He says that criminals often gain access to OT systems by compromising contract and third party vendors.

“Devices are installed onto the network to make workers’ jobs more efficient but the IT team either isn’t alerted to their presence or can’t see them via existing asset discovery processes. Vendors come in and do their job, then leave devices behind or leave decommissioned assets connected, creating rogue devices that aren’t managed and secured. This creates potential to take the organisation down with a single attack.” 

Forescout states that utilities can protect themselves by gaining full visibility into all the devices connected to the network, understanding what’s connected at all times and managing those connected devices to prevent unauthorised access to the network. 

“When it comes to asset discovery, utilities should carefully start with the system critical services and work in priority order to identify: what assets support the process; what hardware and software run on the assets; what network topology supports them; and what endpoints, devices, and non-network connected devices really constitute the asset in its entirety,” says Hunter.

“Utilities should put in place a framework of controls from asset discovery, hardware, and software asset management, configuration management, and vulnerability management, to building a blueprint for efficient and measurable risk reduction.” 

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