Book Image

Industrial Cybersecurity - Second Edition

By : Pascal Ackerman
Book Image

Industrial Cybersecurity - Second Edition

By: Pascal Ackerman

Overview of this book

With Industrial Control Systems (ICS) expanding into traditional IT space and even into the cloud, the attack surface of ICS environments has increased significantly, making it crucial to recognize your ICS vulnerabilities and implement advanced techniques for monitoring and defending against rapidly evolving cyber threats to critical infrastructure. This second edition covers the updated Industrial Demilitarized Zone (IDMZ) architecture and shows you how to implement, verify, and monitor a holistic security program for your ICS environment. You'll begin by learning how to design security-oriented architecture that allows you to implement the tools, techniques, and activities covered in this book effectively and easily. You'll get to grips with the monitoring, tracking, and trending (visualizing) and procedures of ICS cybersecurity risks as well as understand the overall security program and posture/hygiene of the ICS environment. The book then introduces you to threat hunting principles, tools, and techniques to help you identify malicious activity successfully. Finally, you'll work with incident response and incident recovery tools and techniques in an ICS environment. By the end of this book, you'll have gained a solid understanding of industrial cybersecurity monitoring, assessments, incident response activities, as well as threat hunting.
Table of Contents (26 chapters)
Section 1: ICS Cybersecurity Fundamentals
Section 2:Industrial Cybersecurity – Security Monitoring
Section 3:Industrial Cybersecurity – Threat Hunting
Section 4:Industrial Cybersecurity – Security Assessments and Intel
Chapter 15: Industrial Control System Risk Assessments
Section 5:Industrial Cybersecurity – Incident Response for the ICS Environment

Ingress network connections

In this section, we will be looking at ingress network connections. Ingress network connections are network connections coming into the industrial zone from outside of the industrial zone, such as the enterprise zone or the internet. Ingress connections into the industrial network should be closely monitored and scrutinized for malicious activities or suspicious characteristics such as questionable source IP addresses, unusual services, or the use of unusual ports for the communication protocols used in connections.

Mayhem from the internet

A type of ingress connection that should be downright blocked is connections directly from the internet. In no situation is it advisable to have a public system directly connect to a system on the industrial network. Furthermore, seeing connections that originate from the internet and going into the ICS environment should be considered malicious.

We should start our threat hunting investigations by looking into...