Compliance & Risks
Why East-West Visibility Matters for Grid Security
Learn how east-west traffic visibility helps detect and stop lateral movement attacks inside electric grid infrastructure and critical OT networks.
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Electric power infrastructure is becoming more connected than ever before. Organizations responsible for operating the Bulk Electric System (BES) are increasingly integrating operational technology (OT), industrial control systems (ICS), and enterprise IT environments to support automation, remote operations, and grid modernization.
While this connectivity enables greater operational efficiency, it also introduces new cybersecurity risks.
Attackers targeting critical infrastructure rarely stop at the initial breach. Instead, they move laterally across internal systems, quietly mapping networks, escalating privileges, and searching for high-value operational assets.
For security leaders responsible for protecting electric grid operations, the challenge is no longer just preventing attackers from entering the network. It is stopping them from moving once they are inside while supporting the organization’s broader regulatory and compliance obligations.
This is why visibility into east-west traffic the internal communications between systems inside the Electronic Security Perimeter (ESP) has become essential for protecting modern electric grid environments.
At the same time, regulatory developments such as NERC-CIP-15 are reinforcing the need for stronger monitoring within operational networks supporting the Bulk Electric System.
The Rising Cyber Threat to Electric Grid Infrastructure
BES operators manage some of the most critical infrastructure supporting modern society. Power generation, transmission, and distribution systems depend on complex digital environments that combine legacy operational technology with modern IT systems.
This convergence introduces new cybersecurity challenges.
First, IT and OT environments are increasingly interconnected. Systems that were once isolated are now linked to enterprise networks, remote monitoring platforms, and cloud-based analytics.
Second, many operational environments contain legacy systems and long patch cycles, which can leave vulnerabilities exposed for extended periods.
Third, the ecosystem supporting electric grid operations is highly interconnected. Operators rely on equipment vendors, contractors, service providers, and technology partners across the supply chain. These interconnected relationships can create multiple entry points for attackers seeking to exploit ecosystem vulnerabilities.
Attackers increasingly take advantage of these conditions. Rather than launching immediate disruptive attacks, adversaries often pivot methodically through environments, identifying high-value systems before executing their objectives.
Without strong internal monitoring, these movements can remain undetected.
Why Lateral Movement Is Especially Dangerous in Grid Environments
In electric power environments, a security breach can have consequences far beyond IT systems.
Attackers who gain access to enterprise networks may attempt to move laterally toward operational systems that control generation or transmission infrastructure. Once inside OT environments, adversaries could potentially disrupt operations, manipulate control systems, or impact the delivery of essential services.
Because these systems are interconnected, lateral movement across internal networks can allow attackers to escalate their access quickly.
For CISOs, OT security leaders, and plant operators responsible for protecting grid infrastructure, detecting and stopping lateral movement early is critical to maintaining operational reliability.
Why East-West Traffic Visibility Matters
Inside operational environments, systems constantly communicate with one another. These internal communications are known as east-west traffic.
Examples include:
- Communications between industrial control systems
- Data exchanges between OT devices and monitoring platforms
- Interactions between operational systems and enterprise applications
- Connections between vendor systems and infrastructure environments
While these communications are necessary for operations, they can also provide pathways for attackers.
Once inside a network, adversaries frequently use east-west communication to:
- Move laterally between systems
- Identify high-value operational assets
- Escalate privileges
- Access control systems
Traditional security architectures often focus primarily on monitoring north-south traffic, data entering or leaving the network. As a result, suspicious activity occurring inside operational networks may remain difficult to detect.
In addition, many traditional IT security tools only skim the surface in OT environments, identifying IP traffic but lacking the context needed to interpret industrial communications.
Operational environments rely on specialized protocols and communications such as DNP3, IEC 61850, OPC, and Modbus, along with numerous ports and service interactions between SCADA systems, engineering workstations, controllers, and monitoring platforms.
Improving visibility across these protocols, ports, and internal system interactions allows security teams to detect abnormal behavior earlier and stop threats before they reach critical operational systems.
The Role of NERC-CIP-15
The North American Electric Reliability Corporation Critical Infrastructure Protection (NERC-CIP) standards are designed to strengthen cybersecurity for organizations responsible for operating and securing the Bulk Electric System (BES).
As threats evolve, regulatory expectations are increasingly emphasizing the need for stronger monitoring and visibility within operational environments.
Developments such as NERC-CIP-15 reinforce the need for stronger visibility into communications inside operational networks, recognizing that threats often move laterally after gaining initial access.
For owners and operators of BES, this includes the ability to:
- Monitor communications within Electronic Security Perimeters (ESPs)
- Detect anomalous network behavior
- Identify unauthorized devices or connections
- Investigate potential threats quickly
Strengthening visibility across internal communications helps organizations both improve security posture and support evolving NERC-CIP monitoring expectations.
A Modern Security Approach for Electric Grid Environments
Addressing lateral movement risks requires a security approach that provides visibility across both IT and OT environments. Unlike many traditional security solutions designed primarily for enterprise IT environments, TrendAI Vision One provides deep visibility across industrial protocols, ports, and OT system communications, allowing security teams to understand how operational systems interact and quickly detect abnormal behavior that may indicate lateral movement.
TrendAI’s cybersecurity platform, powered by TrendAI Vision One™, enables organizations to monitor internal activity, detect suspicious behavior, and respond quickly to threats across complex infrastructure environments.
Unlike traditional security tools designed primarily for enterprise IT environments, TrendAI Vision One provides OT-aware monitoring with deep visibility into industrial protocols, ports, and system interactions across operational networks.
This enables security teams responsible for BES environments to understand not only that traffic is occurring, but whether those communications are expected within the operational context of the environment.
AI-driven analytics further enhance this visibility by analyzing patterns across thousands of network interactions and industrial protocol communications. This allows security teams to surface suspicious activity that may indicate lateral movement, even when it blends into normal operational traffic.
Through a unified platform approach, security teams can gain deeper insight into internal communications across both IT and OT environments.
Key capabilities include:
Visibility into Internal Network Communications
Network monitoring technologies provide visibility into communications between systems inside operational environments, helping security teams detect abnormal behavior across east-west traffic.
Detection of Suspicious and Anomalous Traffic
AI-driven detection analyzes network activity and industrial protocol behavior to identify patterns that may indicate lateral movement or compromised systems.
By combining OT-aware monitoring, AI-driven threat detection, exposure management, and cross-environment correlation across IT and operational networks, TrendAI Vision One enables security teams to detect threats earlier and investigate incidents with the context required to protect critical infrastructure.
Discovery of Unmanaged or Unknown Assets
Exposure management capabilities help identify devices that may not be included in traditional asset inventories, including contractor devices or vendor systems connected to operational networks.
Protection for Vulnerable Systems
Network-based protection technologies help prevent exploitation attempts targeting vulnerable systems during long OT patch cycles.
Automated Investigation and Response
Security teams can correlate events across IT, cloud, and operational environments, enabling faster investigation and response to emerging threats.
Together, these capabilities help reduce internal blind spots and strengthen protection across environments supporting critical grid operations.
What BES Owners and Operators Should Do Next
As cyber threats targeting electric grid infrastructure continue to evolve, organizations must strengthen their ability to monitor internal activity and detect threats early.
Security leaders should focus on several priorities:
- Improve visibility into communications across internal operational networks
- Detect abnormal behavior that may indicate lateral movement
- Identify unmanaged or unknown devices connected to OT environments
- Reduce exposure created by interconnected vendor ecosystems
- Implement security platforms capable of monitoring both IT and OT environments
By strengthening internal visibility and detection capabilities, BES operators can significantly reduce the risk of attackers moving laterally across critical infrastructure environments.
Strengthening Protection Across Grid Infrastructure
Stopping lateral movement requires deeper visibility into how systems communicate across operational environments.
Security teams responsible for protecting electric grid infrastructure must be able to detect abnormal activity quickly, investigate potential threats, and respond before incidents impact operations.
Want to explore how your organization can strengthen monitoring across IT and OT environments supporting the Bulk Electric System?