OT Security
Assessment

Purpose-built security assessments for operational technology environments including SCADA, ICS, DCS, and PLCs. We protect critical infrastructure from cyber-physical threats that disrupt production, compromise safety, or cause environmental harm, with IEC 62443 aligned reporting.

Assess OT Security Posture All Services

Non-Disruptive OT Testing SCADA + ICS + PLC Purdue Model Review IEC 62443 + NIST CSF 2.0

SCADA Control Gauges

SCADA Master

Online

PLC S7-1500

Warning

HMI Station

Critical

Unauthenticated Modbus TCP

Historian default creds

Engineering USB detected

OT/IT bridge misconfigured

SCADA

PLC

Purdue

Safety

Testing Areas

What We Test in Your OT Environment

Purpose-built assessment covering your control systems, network architecture, protocols, and safety integration.

SCADA and ICS Assessment

Evaluate supervisory control and data acquisition systems, HMI interfaces, and industrial control systems for vulnerabilities without disrupting live operations.

PLC and RTU Security

Review programmable logic controllers and remote terminal units for insecure ladder logic, hardcoded credentials, and unauthorised firmware modification risks.

HMI and Workstation Security

Assess human-machine interface stations, engineering workstations, and operator terminals for weak OS configurations, unpatched software, and RDP exposure.

Historian and Data Server

Audit historian servers, data collectors, and reporting systems for insecure protocols, weak authentication, and data integrity risks.

Engineering Station

Evaluate engineering workstations used for PLC programming and configuration for unauthorised access, malware risks, and IT-OT crossover vulnerabilities.

Safety Instrumented Systems

Assess the interaction between security controls and safety instrumented systems to ensure cyber response never compromises physical safety.

Purdue Model Review

Analyse your OT network architecture against the Purdue Model, identifying gaps in segmentation, flat networks, and unauthorised IT-OT crossover paths.

Industrial Protocol Analysis

Analyse Modbus, DNP3, OPC DA/UA, BACnet, and PROFINET traffic for cleartext transmission, spoofing, and replay vulnerabilities.

IT-OT Crossover Detection

Identify unauthorised network paths between IT and OT zones, assess firewall rules, and validate that demilitarised zones enforce proper isolation.

Wireless and Remote Access

Test wireless access points, VPN gateways, and remote access pathways into OT zones for authentication weaknesses and unauthorised entry.

Firewall and DMZ Review

Review firewall rules, DMZ configurations, and access control lists between OT zones for overly permissive rules and misconfigurations.

Passive Traffic Analysis

Monitor network traffic passively to map communication patterns, identify undocumented connections, and detect anomalous device behaviour.

Access Control and Identity

Audit authentication mechanisms, role-based access controls, and remote access pathways into OT zones for privilege escalation risks.

Credential and Account Review

Identify default passwords, shared accounts, and inactive credentials with privileged access to OT systems and management interfaces.

Incident Response Playbooks

Develop OT-specific incident response playbooks that integrate with safety instrumented systems and respect operational constraints.

Patch and Change Management

Evaluate patch management processes for OT systems, including risk-based patch prioritisation and testing procedures that minimise operational impact.

Logging and Monitoring

Review SIEM integration, log collection, and alerting configurations to determine whether your team would detect a real OT-focused attacker.

Compliance and Standards

Map security controls and findings to IEC 62443, NIST CSF 2.0, NERC CIP, and sector-specific regulatory requirements for audit readiness.

Methodology

How We Run an OT Security Assessment

A structured six-phase process aligned with IEC 62443 and NIST CSF 2.0, from asset inventory through a phased remediation roadmap.

Phase 01

Asset Inventory and Architecture Review

Map all OT assets, data flows, and network topology validated against the Purdue Model for segmentation gaps and undocumented connections.

Phase 02

Threat Modelling

Identify threat vectors specific to your industrial environment including IT-OT crossover, remote access, supply chain, and insider threats.

Phase 03

Non-Disruptive Vulnerability Assessment

Passive and active scanning of OT assets using purpose-built tools that will not impact process availability or safety systems.

Phase 04

Protocol and Communication Analysis

Analyse industrial protocol traffic including Modbus, DNP3, OPC UA, and PROFINET for cleartext transmission, spoofing, and replay vulnerabilities.

Phase 05

Security Controls Validation

Test access controls, patch management, logging, backup integrity, and remote access security against IEC 62443 requirements and your operational constraints.

Phase 06

Reporting and Remediation Roadmap

Deliver prioritised findings with risk ratings, IEC 62443 mapping, and a phased remediation roadmap that respects operational constraints and production schedules.

Who It's For

Built for Organisations With Real Infrastructure

Manufacturing and Processing Plants

Factories, refineries, and processing facilities running SCADA, PLC, and DCS systems where a cyber incident can halt production and compromise safety.

Energy and Utilities

Power generation, water treatment, and utility companies operating critical infrastructure that must maintain continuous availability and meet regulatory compliance.

Transport and Logistics

Railway, maritime, and logistics operators with OT-dependent signalling, routing, and control systems where cyber attacks create public safety risks.

FAQ

Questions We Get Asked Often

OT security assessment is a purpose-built evaluation of operational technology environments including SCADA, ICS, DCS, and PLCs. It covers control system vulnerabilities, network segmentation, industrial protocol analysis, and safety system integration, aligned with IEC 62443 and NIST CSF 2.0.

OT security prioritises availability and safety over confidentiality. Systems often run legacy operating systems, use specialised industrial protocols (Modbus, DNP3, OPC UA), and cannot be patched using conventional IT approaches. Testing must be non-disruptive and respect operational constraints.

Scyverge aligns OT assessments with IEC 62443, NIST CSF 2.0, NERC CIP, and sector-specific regulatory requirements. Findings are mapped to these frameworks for compliance-ready reporting and audit support.

No. We use non-disruptive testing techniques including passive traffic analysis, configuration review, and purpose-built OT scanning tools. All testing follows a strict rules of engagement document that defines acceptable activities and off-limits systems.

Yes. We assess PLCs for insecure ladder logic, hardcoded credentials, and firmware modification risks. SCADA systems are evaluated for protocol vulnerabilities, HMI weaknesses, and unauthorised access paths, all without impacting live operations.

OT SecurityAssessment