Securing operational technology: A cybersecurity guide

Business

Modern industries have become fully immersed in Integrated Information Technology (IT) with Operational Technology (OT).

Operational Technology encompasses computing devices and systems that interface with industrial equipment and processes, primarily to monitor or initiate changes and events.

As complex as these systems become digitally integrated and with more lines of dependency, they fall more into the category of the dark web’s targets. So it is vital to ensure adequate protection of OT to preserve the integrity, security, accessibility, as well as reliability of managed industrial facilities and processes.

To support real-time communication and data exchange across remote sites, many OT systems now rely on cellular antennas as a critical component of their connectivity infrastructure. These cellular antennas enable seamless integration between field devices and centralized control systems, but they also introduce new cybersecurity vulnerabilities that must be addressed.

Understanding the OT landscape

Operational Technology refers to multiple levels of systems, ranging from low-level sensors and actuators to higher-level systems like SCADA systems. While IT systems are comparatively unique and may have specific properties and prerequisites, the same often applies to OT systems as well. 

They are built for dependability, durability, and continuous service, often embedded in older, even archaic, black boxes. Most of them had not been developed with a cybersecurity guide in their considerations; this is a big challenge, especially in today’s proactively knit threat environment.

The integration of industrial IT and operational technology

Integration has provided numerous advantages, including enhanced data infrastructure, analysis capabilities, and the ability to predict operational conditions and asset life cycle. Still, this integration also has its downside because it opens new directions for the attack.

Key threats to OT systems

Source: https://www.cyber.gc.ca/en/guidance/cyber-threat-bulletin-cyber-threat-operational-technology

Malware and Ransomware

Under Cyber threats, there is industrial malware that disrupts normal operation, damages equipment, or steals information. Detecting such threats often requires specialized tools, including pattern-matching techniques like Yara rules that identify malicious code through distinctive signatures. Many ransomware attacks include locking the primary data and the essential organizational systems, stopping its functioning, and threatening to resume unless a ransom is paid.

Phishing and Social Engineering

Hackers need to target individuals to infiltrate the OT networks since people act as the weakest link, for instance, by falling for phishing and social engineering. They can trick employees into revealing their identity information or download malicious software into the organization’s network.

Insider Threats

OT systems are critical infrastructure and when professionals specifically employees or contractors that are working with the OT systems will willingly or accidentally compound significant damages. Insider threats have been considered very difficult to control or prevent because insiders enjoy legitimate access to most organizational resources.

Remote Access Exploits

Some OT systems are even available for remote access due to maintenance and monitoring. This is because the vulnerabilities in remote access protocols can be a point of attack that the attackers leverage to control the OT assets.

Supply Chain Vulnerabilities 

Subsystems and software employed in OT systems, including those composed of partly proprietary reference models. These are usually procured from multiple suppliers. The investigation of supply chain risks will identify threats and points of vulnerability within an OT setting.

Securing optime systems: An overview

Asset Inventory and Management

Cybersecurity requires listing all the OT assets systematically, especially for small and medium-sized industries. activities involve focusing on the OT and determining all the hardware, software, and communications in the area. Periodic flying checks and updates of this inventory aid to keep bad light over the OT.

Network Segmentation

Isolating IT and OT can reduce the likelihood of an attack reaching its target by siloing IT and OT networks. The use of networks such as firewalls, VLANs, and DMZs also aids in the barring of various threats that source from IT networks to the OT systems.

Access Control

Appropriate security measures in the OT layer entail appropriate control of which personnel should be allowed to access the systems. This entails strict user identification methods, assigning users appropriate access according to organizational position holdings, and granting access rights in such a manner that the user has the least privilege as required in performing duties bearing the highest risks of computational compromise.

Patch Management

Failure to apply the necessary security patches to OT systems is a risk that needs to be eliminated to minimize the dangers posed. That said, patching in the OT environment should be well-hatched in a way that does not interrupt the flow of processes. These help in prioritizing patching or identifying vulnerabilities that require frequent attention.

Incident Response Planning

Having a clear, well-constructed process for handling and preventing OT-related incidents, regularly reviewed, is essential. Thus, this plan should include steps for identifying the threats, implementing controls to prevent them from happening, and measures that would prevent such threats from disrupting the business much.

Monitoring and Anomaly Detection

A cyber attack on an OT system is hard to launch and maintain, especially if there is constant observation of the OT systems for differences that may signal an issue. Hiring IDS and SIEM specialists and tuning IDS and SIEM solutions specifically for OT use increases threat exposure.

Training and Awareness

It’s crucial to offer Cybersecurity training to employees as they remain vulnerable to cybercrimes. It is effective to provide the personnel with ongoing training and conduct awareness programs to make sure that they know their part of their duties to secure OT systems and treat them for the possible challenges to come.

Supplier Security Assurance

Preemptively setting the cybersecurity bar high regarding supplier and third-party vendors is another way of reducing supply chain vulnerability. This incorporates evaluation of security requirements, and establishing mandatory conformance with best practices and directives.

Standardization and a regulatory environment

Ensuring that all the OT protocols are well aligned with the industry standards and recommended guidelines is key to achieving security. It is crucial to note that there are established standards that organizations can follow to enhance the implementation of cybersecurity in industrial settings. Industry standards, or governing bodies as well as guidelines such as the NERC CIP standard for the energy industry prescribe certain security measures on critical infrastructure.

The future of OT security

The purpose of these brief comparisons is to exemplify that as OT systems develop, so do also the threats that face them. The development of IIoT and the growing use of AI and ML as the basis for future OT technology can also introduce new possibilities and threats to security. The next-generation OT security processes are expected to include real-time threat feeds, machine learning models, and instant responsive solutions to cyber threats.

Role of patch management in OT security

Conclusion

Protecting OT assets is challenging and can be best viewed as a continuous process due to the ever-evolving threat landscape and constantly evolving environment that operational technology operates within.

Organizations must have general awareness about the OT environments and follow the best security practices that can help to safeguard the organization’s important infrastructure from cyber threats.

This article aims to demonstrate that despite the advancing technological landscape, IT and OT security can only be maintained and developed continuously so that industrial processes are safe, reliable, and efficient. Connected IT and OT systems mean increased operational efficiency and the ability to collect and analyze a wealth of data; however, it exposes organizations to a growing number of cybersecurity threats and risks.

FAQs

What are Operational Technologies (OTs)?

OT is pointing to the equipment used in industrial settings to manage devices, processes, and events with the help of hardware and software tools.

Why is the general protection of OT important?

IT security attention has risen because protecting OT is crucial to guarantee the operation’s reliability, prevent physical damages, and shield the networks from cyber-related issues.

What security threats can emanate from the IT/OT convergence?

IT and OT integration means that Cyber Threats have other ways their threats can cause havoc and may move from the IT domain and into OT.