Avalias Blog

Modern power grids rely on interconnected digital control systems. This connectivity creates a new, consequential attack surface for cyber adversaries. A coordinated cyberattack on the electric grid could trigger widespread power outages and cascading failures across critical services. 

For organizations, preparation is essential. Read on as we outline what a power grid cyberattack entails, how to fortify your organization against it, and how tools like Avalias’s Avalanche TTX can help teams practice their response.

What a power grid cyberattack looks like (and what fails first)

A power grid cyberattack is an intentional breach of the networks and control systems that operate electricity generation, transmission, and distribution.

Here’s an overview of how grid cyberattacks typically unfold. Attackers commonly infiltrate a utility’s IT network (often via phishing or malware) and then pivot into operational technology (OT) systems. An IT-to-OT pivot is common, but not applicable in all cases. 

Once inside, they can send malicious commands to disrupt equipment, causing blackouts. The impacts range from local power outages to large-scale grid failures, with potential physical equipment damage and risks to public safety.

For example, in February 2022, a cyberattack on a satellite provider disrupted network communications across Europe, knocking tens of thousands of modems offline. The incident also affected remote monitoring and control for thousands of wind turbines, reducing visibility across distributed energy assets.

While electricity generation continued and the grid remained stable, the event showed how rapidly cyber incidents can introduce uncertainty into critical operations — and how essential it is to be prepared.

Organizational preparedness checklist

The following checklist outlines essential steps and security measures for strengthening cyberattack preparedness.

Establish a crisis management team

Establish a formal Crisis Management Team (CMT) well before any incident. At the same time, develop an incident response plan with broad CMT buy-in. This team must be cross-functional and include leaders from operations, IT, cybersecurity, and communications. Clearly assign leadership roles and responsibilities within the team. During a cyber crisis, the CMT coordinates decisions and communications, providing unified direction and fast, informed decision-making — a critical step in defending energy infrastructure.

Maintain an inventory of critical assets

Maintain an up-to-date inventory of all critical systems and devices on the network. Catalog operational technology (OT) assets (i.e., substation controllers, SCADA servers, protective relays, communications links) alongside IT assets. Understand each asset’s importance, vulnerabilities, and potential threat exposure. This knowledge is fundamental to prioritizing security controls and ensuring no important device is overlooked during a cyberattack.

Enforce least-privilege access

Adopt the principle of least privilege in both IT and OT environments. Each user and service account should hold only the minimum access necessary for its role. Implement role-based access controls (RBAC) to enforce strict permissions and avoid shared or default passwords. Limiting access rights reduces the chance that a single compromised account can pivot into critical control systems and cause widespread damage to the power system.

Segment IT and OT networks

Isolate your operational network from the corporate IT network as much as possible. Implement strict network segmentation and a demilitarized zone (DMZ) to tightly control all data flows between IT and OT systems. Avoid a flat network where an attacker who breaches the business LAN can directly reach SCADA or PLC networks. Additionally, use firewalls with ICS/SCADA protocol awareness to filter and monitor the limited connections that the environment requires between segments — a key defense against grid attacks.

Implement continuous monitoring

Deploy continuous monitoring and threat detection tools across both IT and OT networks. An OT-aware intrusion detection or anomaly detection system can catch suspicious behavior in industrial protocols (i.e., unusual Modbus commands or rogue firmware changes) in real time. Ensure that your security team actively reviews security logs and alerts from critical systems. Early detection of cyber threats and anomalies allows responders to act before incidents escalate into major attacks on critical infrastructure.

Equip redundant communication channels

Prepare backup communication methods that do not rely on the primary network. In a severe cyber incident, attackers can compromise or disable normal channels. Set up secure out-of-band communication options for the crisis team (i.e., satellite phones, two-way radios, or encrypted messaging apps on separate networks). 

Conduct regular tabletop exercises

Run simulated cyberattack exercises on a routine basis to maintain organizational readiness. Tabletop exercises allow the incident response team to walk through a grid-attack scenario in a controlled environment. This practice helps the team identify gaps or weaknesses in existing plans and procedures before an actual cyberattack on the electrical grid occurs.

Avalias: Your partner in preparedness

Avalias’ Avalanche TTX platform is an all-in-one scenario-based training solution that empowers teams to seamlessly create, deliver, and review customized cyber crisis exercises. 

With Avalanche TTX, your organization can simulate a power grid cyberattack (or any emergency scenario) in a realistic but controlled environment. These lifelike exercises help identify gaps in your response plan and reinforce best practices, so when a real incident occurs, your team is one step ahead. 

Learn more about Avalanche TTX and see how scenario-based training can strengthen your preparedness.