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OT Asset Visibility & Operational Awareness

File:OT Asset Visibility Dashboard.png
Example OT Asset Visibility Platform

Executive Summary

Operational Technology (OT) Asset Visibility platforms have become foundational capabilities for utility cybersecurity, operational resilience, and asset management programs. As industrial environments become increasingly connected, organizations require accurate visibility into assets, communications, software, and network behavior across generation, transmission, distribution, and critical infrastructure environments.

Modern OT visibility platforms provide continuous asset discovery, protocol awareness, behavioral analysis, and integration with security operations tools. These capabilities help organizations improve situational awareness, reduce cybersecurity risk, and support operational decision-making.

Why OT Asset Visibility Matters
Area Business Value
Cybersecurity Identifies assets, communications, and potential security risks across OT environments.
Operations Provides visibility into critical systems, communications flows, and operational dependencies.
Asset Management Supports inventory management, lifecycle planning, and modernization initiatives.
Incident Response Accelerates investigations through improved asset context and network awareness.

Industry Context

Utilities continue integrating distributed energy resources (DERs), inverter-based resources (IBRs), intelligent electronic devices (IEDs), remote connectivity solutions, and cloud-enabled services throughout operational environments.

As OT ecosystems become more interconnected and complex, maintaining an accurate inventory of assets, communications pathways, protocols, and software dependencies becomes increasingly important.[1]

EPRI cybersecurity research continues to emphasize understanding network architectures, external communications, and asset inventories as foundational components of both cybersecurity and operational resilience programs.[2]

Unlike traditional IT environments, operational networks often contain specialized systems, proprietary protocols, legacy devices, and safety-critical processes that cannot be actively scanned without introducing operational risk. OT visibility platforms help address these challenges through passive monitoring and protocol-aware analytics.

Core Capabilities

Asset Discovery

OT visibility platforms use passive monitoring techniques to identify and inventory devices communicating across industrial networks without disrupting operations.

Commonly discovered assets include:

  • Programmable Logic Controllers (PLCs)
  • Human Machine Interfaces (HMIs)
  • Distributed Control Systems (DCS)
  • Supervisory Control and Data Acquisition (SCADA) systems
  • Intelligent Electronic Devices (IEDs)
  • Protection relays
  • Engineering workstations
  • Historians
  • OT servers and network infrastructure

Why It Matters

Organizations cannot effectively secure assets they cannot identify. Comprehensive inventories provide the foundation for cybersecurity, compliance, vulnerability management, architecture reviews, and modernization initiatives.

EPRI's Technical Assessment Methodology (TAM) highlights asset awareness and attack surface understanding as foundational activities for evaluating cybersecurity risks across operational environments.[3]

Asset Context & Intelligence

Modern platforms go beyond simple inventory management by providing operational context through protocol analysis, communications monitoring, and relationship mapping.

Examples include:

  • Industrial protocol identification
  • Communications flow analysis
  • Firmware visibility
  • Device relationship mapping
  • Network dependency analysis
  • Asset criticality classification

These capabilities help organizations understand how devices interact and support more effective risk prioritization.

Behavioral Visibility

OT visibility platforms establish baseline operational behavior by continuously monitoring communications between assets.

Behavioral analytics can identify:

  • Unexpected communications
  • Unauthorized devices
  • Configuration changes
  • Abnormal protocol behavior
  • Potential cyber threats

Rather than relying solely on signature-based detection, organizations gain visibility into deviations from established operational patterns.

Security Operations Integration

Asset visibility platforms increasingly integrate with enterprise cybersecurity programs.

Common integrations include:

  • Splunk
  • Microsoft Sentinel
  • IBM QRadar
  • ServiceNow
  • Palo Alto Networks
  • Cisco XDR
  • CrowdStrike
  • Microsoft Defender XDR

These integrations enable OT asset intelligence to support security operations centers (SOCs), incident response teams, threat hunting programs, and enterprise risk management activities.

Operational & Cybersecurity Benefits

Capability Benefit
Asset Inventory Establishes a comprehensive view of OT devices, software, and communications.
Protocol Awareness Improves visibility into industrial communications and operational dependencies.
Risk Prioritization Helps focus resources on critical systems and high-value assets.
Threat Detection Identifies abnormal behavior and unauthorized activity.
Incident Response Improves investigation speed and asset understanding.
Compliance Support Assists with asset identification, security reviews, and audit readiness.

OT Visibility Platform Landscape

Several OT visibility platforms have become widely adopted across utility, industrial, manufacturing, and critical infrastructure sectors.

Representative OT Asset Visibility Platforms
Platform Primary Strengths Common Utility Use Cases
Nozomi Networks Deep OT protocol visibility, asset discovery, anomaly detection, vulnerability identification Substations, generation facilities, transmission environments, control center monitoring
Dragos Asset inventory, ICS threat detection, threat intelligence, incident response support OT security operations, threat hunting, industrial cyber defense
Claroty Asset discovery, exposure management, risk analysis, secure remote access Enterprise OT visibility and asset management programs
Microsoft Defender for IoT Agentless monitoring and strong integration with Microsoft security products Organizations utilizing Microsoft Sentinel, Defender XDR, and Azure services
Armis Agentless asset visibility, IT/OT convergence, vulnerability and exposure management Enterprise-wide visibility across IT, OT, IoT, and connected devices

Inclusion in this table does not imply endorsement. Organizations should evaluate solutions based on operational requirements, cybersecurity objectives, architecture constraints, and integration needs.

Selection Considerations

Organizations commonly evaluate OT visibility platforms based on:

  • OT protocol coverage (DNP3, IEC 61850, Modbus, OPC, ICCP, Ethernet/IP, Profinet)
  • Passive monitoring capabilities
  • Integration with existing SIEM and SOC workflows
  • Asset inventory accuracy
  • Threat detection maturity
  • Scalability across substations and operational sites
  • Cloud versus on-premises deployment requirements

Utility Use Cases

Asset Inventory Modernization

Many organizations begin OT visibility initiatives to establish accurate and continuously updated inventories across substations, generation facilities, control centers, battery energy storage systems, and field operations.

Cybersecurity Monitoring

Asset context enhances threat detection and incident response by helping analysts understand device roles, communications pathways, and operational importance.

Vulnerability & Risk Management

Visibility platforms help organizations identify vulnerable devices, unsupported operating systems, legacy technologies, outdated firmware, and insecure communications.

Architecture & Communications Reviews

EPRI assessments increasingly emphasize understanding communications pathways, protocol usage, and external connectivity as part of secure-by-design deployment approaches.[4]

Operational Resilience

Understanding dependencies between devices and systems enables more effective planning, troubleshooting, maintenance, recovery, and operational decision-making.

Recommended Practices

Recommended Implementation Approach
Focus Area Recommended Actions
Discovery Deploy passive sensors to establish visibility without disrupting operational processes.
Inventory Develop and maintain complete inventories of OT assets, firmware, software, and communications pathways.
Architecture Document trust boundaries, external connectivity, and protocol dependencies.
Integration Integrate OT telemetry into SIEM, SOC, and incident response platforms.
Monitoring Establish behavioral baselines and continuously monitor for abnormal activity.
Governance Incorporate OT visibility into cybersecurity, risk management, compliance, and asset management programs.

Industry Trends

Several trends continue shaping the OT visibility market and broader utility cybersecurity landscape.

Market Direction
Trend Description
IT/OT Convergence Increased visibility across enterprise and operational environments.
Exposure Management Prioritization of exploitable vulnerabilities and operational risks.
AI-Assisted Analysis Automated asset classification, alert triage, and risk identification.
Secure Remote Access Enhanced management and monitoring of vendor and contractor connectivity.
Grid Modernization Greater visibility requirements resulting from DER, IBR, and BESS deployments.
Digital Twins Enhanced modeling of operational assets and system interdependencies.

As utilities deploy increasing numbers of inverter-based resources, intelligent electronic devices, and connected operational technologies, maintaining accurate visibility into assets, communications, and dependencies is becoming a foundational requirement for cybersecurity, resilience, and operational excellence.[5]

References

  1. ↑ EPRI Defensible Network Architectures: Criteria for Secure OT Deployment in Power Systems (3002027430)
  2. ↑ EPRI Security Design Architecture Review: Solar Inverters (3002029720)
  3. ↑ EPRI Technical Assessment Methodology (3002012752)
  4. ↑ EPRI Security Design Architecture Review: Solar Inverters (3002029720)
  5. ↑ EPRI Inverter-Based Resources and Grid Interconnection Research Area

EPRI Resources

Related Topics

  • Operational Technology (OT) Security
  • Industrial Control Systems (ICS)
  • SCADA Security
  • Asset Management
  • Security Operations Centers (SOC)
  • Industrial Threat Detection
  • Network Architecture
  • Zero Trust Architecture
  • Cyber-Informed Engineering
  • Digital Twins
  • Inverter-Based Resources (IBRs)
  • Battery Energy Storage Systems (BESS)
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