Threat actor

A threat actor is any individual, group, or system that carries out, attempts to carry out, or significantly enables actions that can harm an organization’s assets, data, or operations. In industrial and manufacturing environments, this typically refers to entities that pose cybersecurity, operational, or information security risks to OT and IT systems.

Scope of the term

In the context of manufacturing and industrial operations, a threat actor commonly includes:

• External attackers such as criminal groups, hacktivists, or state-aligned groups targeting production, OT networks, or intellectual property.
• Insiders such as employees, contractors, or partners who misuse access intentionally (malicious insiders) or accidentally (negligent insiders).
• Supply chain–related actors such as compromised vendors, integrators, or service providers whose systems or credentials are used as a path into plant systems.
• Automated systems under an actor’s control, for example botnets, scripts, or malware components that execute the attack activities.

The focus is on the entity taking the action, not the vulnerability or the consequence. A threat actor may exploit vulnerabilities in MES, ERP, SCADA, PLCs, quality systems, or network infrastructure to disrupt production, corrupt data, or exfiltrate sensitive information.

What a threat actor is not

• It is not the same as a threat, which is a potential cause of an unwanted incident (for example, ransomware, phishing, or equipment sabotage).
• It is not the same as a vulnerability, which is a weakness in a system, process, or control.
• It is not limited to cyber specialists; anyone with the intent and capability to cause harm, including physical tampering with OT equipment, can be a threat actor.

Operational relevance in manufacturing

Identifying and characterizing threat actors is part of risk assessment and cybersecurity planning for industrial environments. Practitioners often:

• Classify threat actors by motivation (financial gain, espionage, sabotage, activism, curiosity).
• Assess their capabilities (access to tools, OT knowledge, ability to move between IT and OT networks).
• Relate them to specific attack scenarios, such as altering process parameters, disabling safety systems, manipulating quality data, or disrupting MES/ERP integrations.

This classification supports decisions on monitoring, access control, incident response workflows, and coordination between IT security, OT engineers, and quality/compliance teams.

Common confusion

• Threat vs. threat actor: A threat is the potential event (for example, a ransomware infection on an MES server). The threat actor is the person or group using ransomware to carry out the attack.
• Risk vs. threat actor: Risk is typically expressed as the combination of likelihood and impact of a threat scenario. The threat actor is one element influencing the likelihood side of that risk.

Use in regulated and industrial contexts

In regulated manufacturing environments, the concept of a threat actor is frequently used in:

• Cybersecurity risk assessments for OT networks, data historians, and MES/ERP integrations.
• Incident investigation and root cause analysis, where part of the analysis is determining whether a human or automated threat actor was involved.
• Access management and vendor oversight, where external partners, system integrators, and remote support providers are evaluated as potential threat actors or exposure paths.

Using the term consistently helps distinguish who is acting (the actor), what method they use (the threat or attack vector), and where they succeed (the vulnerability exploited) when documenting and managing industrial cybersecurity and operational risks.