Cyber attacks against the energy sector are no longer confined to data theft, ransomware demands or disrupted office systems. Attackers are increasingly targeting the operational technology that controls generation, transmission and distribution, creating the potential for physical disruption, equipment damage, safety incidents and loss of supply.
For energy organisations, effective protection begins with understanding every OT asset, separating critical systems from unnecessary connectivity, controlling remote access, continuously monitoring industrial networks and preparing an OT-specific incident response plan. These measures must be designed around operational safety and availability, not simply copied from an IT security programme.
Recent incidents show why this has become an urgent priority.
In July 2026, a cyber attack reportedly linked to Iranian actors forced a small UK power generator offline for four days. The affected facility was not publicly identified and the UK Government stressed that the incident did not threaten the wider electricity system or cause power cuts.
The attack demonstrated that a threat actor could disrupt the physical operation of a UK energy asset, even if that asset represented only a small part of national generating capacity. It also prompted the Government to brief energy company leaders on protecting their infrastructure. It also forces energy suppliers around the world to ask the question; if it can happen in the UK then it can happen here.
The incident should challenge the assumption that only major power stations and transmission operators are valuable targets. Smaller generators, renewable installations, substations and remotely operated assets may have fewer security resources, less mature governance and greater reliance on internet-facing connectivity.
As the UK incident demonstrated, attackers do not need to compromise the national grid to cause operational, financial and reputational damage. They only need to find one inadequately protected facility.
The energy sector is becoming more connected. Generation assets, control centres, smart grids, renewable installations and third-party platforms increasingly exchange operational data. This connectivity improves efficiency and situational awareness, but it also creates more potential entry points.
According to reports attackers are using AI to accelerate reconnaissance, identify weaknesses, produce convincing social engineering content and develop scripts capable of interacting with industrial protocols.
This does not mean AI has suddenly made every attacker an industrial control system expert. It does, however, help adversaries automate parts of the attack path and examine far more potential targets. Weak configurations, exposed devices and insecure remote connections can be found and exploited faster.
This is particularly concerning for smaller utilities and distributed energy operators. A large energy company may have a dedicated security team, established monitoring and mature incident response capabilities. A small solar farm, peaking plant or regional utility may operate legacy equipment with limited security functionality, remote vendor access and only a thin layer of network protection.
AI gives attackers scale. A fragmented energy ecosystem gives them somewhere to use it.
Operational technology cannot be secured in exactly the same way as enterprise IT. In a conventional IT environment, confidentiality and data protection are major priorities. In an energy OT environment, safety, integrity, availability and continuity of service are paramount.
Several characteristics make energy infrastructure particularly challenging:
The traditional belief that industrial networks are safely isolated is no longer credible. Connectivity is now integral to modern energy operations, but every connection must be understood, justified and secured.
Energy organisations should concentrate on a practical set of measures that reduce exploitable exposure while preserving operational safety.
You cannot protect systems that you do not know exist.
An OT asset inventory should identify hardware, software, firmware, industrial protocols, network connections, system owners and operational dependencies. Assets should also be classified according to their criticality, safety implications and role in the generation or distribution process.
The inventory must be continually maintained. A static spreadsheet created during an annual audit will quickly become outdated as equipment, configurations and supplier connections change.
Energy operators should identify how data, users and services move between enterprise IT, OT networks, cloud platforms, vendors and remote sites.
Every connection should have a defined operational purpose. Unnecessary connections should be removed, while required connectivity should be centralised, standardised and protected through appropriate security controls.
OT operators need to limit exposure, strengthen network boundaries and ensure appropriate logging and monitoring. These principles are particularly relevant to distributed energy infrastructure and remotely managed facilities.
A compromise of an email account or business application should not give an attacker a route into generation systems.
Energy organisations should establish clear separation between IT and OT networks, supported by properly configured firewalls, industrial demilitarised zones and tightly controlled communication paths. Critical systems should be divided into zones according to their function and risk.
Segmentation controls must also be tested. A network diagram showing separation provides little assurance if firewall rules, unmanaged connections or misconfigured equipment allow attackers to bypass it.
Remote access is often essential for maintenance and support, but it remains one of the most attractive routes into an OT environment.
Access should be enabled only when required, use strong authentication and be restricted to specific systems and activities. Sessions should be monitored and logged, while dormant accounts and unnecessary vendor connections should be removed.
Organisations must also understand which suppliers can access operational assets, how those suppliers protect their own systems and what happens to access when contracts or personnel change.
Traditional IT monitoring tools may not understand industrial protocols or may generate traffic that affects sensitive OT equipment. Energy organisations need monitoring designed for industrial environments.
Passive network monitoring can help establish normal operational behaviour, identify unexpected communications and detect changes without interfering with physical processes. Monitoring should extend across the IT/OT boundary so defenders can identify attempts to move from compromised business systems towards critical operations.
Not every vulnerability can be patched immediately, and not every vulnerability presents the same risk.
OT vulnerability management should consider whether an asset is exposed, its operational role, the availability of an exploit, existing compensating controls and the potential effect of remediation. Patches should be tested before deployment and planned around operational requirements.
Where patching is not immediately possible, organisations should consider isolation, access restrictions, monitoring, configuration changes or other compensating controls.
An IT incident response playbook may recommend isolating or shutting down a compromised device. In an OT environment, that action could interrupt power generation, damage equipment or create a safety risk.
Energy organisations need response plans developed jointly by security teams, engineers, operators, safety personnel, leadership and relevant suppliers. The plan should define how the organisation will detect, contain and recover from an attack while maintaining the safest possible operational state.
Exercises should test realistic scenarios, including the loss of remote visibility, ransomware crossing from IT into OT, compromised vendor access and manipulation of industrial control systems.
Protecting operational technology requires a combination of cybersecurity expertise and practical understanding of industrial systems. Integrity360’s dedicated OT Security practice helps energy organisations identify exposures, strengthen controls and build resilience across both IT and OT environments.
Our services include:
Integrity360 combines specialist OT knowledge with expertise across enterprise security, helping organisations address the entire attack path rather than treating industrial systems as an isolated environment. Our team has supported critical infrastructure and industrial organisations across multiple sectors and continents, including security programmes for energy and natural gas operations.
OT Resilience Cannot Wait for the Next Attack
The energy sector is becoming more connected at the same time as geopolitical tension, criminal activity and AI-enhanced attacks are increasing. That combination makes operational resilience a strategic requirement.
Energy organisations should not wait for a major outage before asking whether their assets are visible, their networks are properly segmented or their response plans will work. The four-day shutdown of a small UK generator shows that operational disruption is already possible. The next target may be larger, more connected or harder to recover.
Protecting energy infrastructure begins with understanding where the organisation is exposed and prioritising the measures that will have the greatest effect on safety, availability and resilience.
Speak to Integrity360’s OT Security specialists to assess your current environment, identify critical exposures and build a practical roadmap for protecting your energy operations.
What is OT security in the energy sector?
OT security protects the industrial systems that generate, transmit, distribute and manage energy. These include industrial control systems, programmable logic controllers, supervisory control and data acquisition systems, substations and remotely operated generation assets.
Why is the energy sector targeted by cyber attackers?
Energy infrastructure provides essential services and has significant economic and geopolitical importance. Disrupting it can create operational damage, public concern and wider pressure on governments or organisations. Energy environments also contain legacy systems and distributed assets that may be difficult to secure consistently.
What is the biggest OT security risk for energy companies?
There is no single risk that applies to every operator, but common exposures include insecure remote access, poor IT/OT segmentation, incomplete asset inventories, legacy systems, unsupported software and insufficient monitoring of industrial networks.
Can energy companies patch OT systems like ordinary IT systems?
Not always. OT patches must be assessed and tested because updates can affect system stability, compatibility and operational safety. When immediate patching is not possible, organisations should implement compensating controls such as segmentation, access restrictions and enhanced monitoring.
How should an energy company begin improving OT security?
Begin with an OT risk assessment and accurate asset inventory. This establishes what equipment exists, how systems are connected, which assets are critical and where the most significant exposures are located. The findings can then inform a risk-led security and remediation roadmap.