Industrial cybersecurity: efficiency secure critical infrastructure systems

449 Pages·2017·25.605 MB·English

by  Ackerman, P

Industrial Cybersecurity
Efficiently secure critical infrastructure systems
Pascal Ackerman
BIRMINGHAM - MUMBAI
Industrial Cybersecurity
Copyright © 2017 Packt Publishing
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First published: October 2017
Production reference: 1161017
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ISBN 978-1-78839-515-1
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Credits
Author Copy Editor
Pascal Ackerman Stuti Srivastava
Reviewers Project Coordinator
Richard Diver Virginia Dias
Sanjeev Kumar Jaiswal
Commissioning Editor Proofreader
Vijin Boricha Safis Editing
Acquisition Editor Indexer
Heramb Bhavsar Rekha Nair
Content Development Editor Graphics
Sweeny Dias Kirk D'Penha
Technical Editor Production Coordinator
Vishal Kamal Mewada Deepika Naik
About the Author
Pascal Ackerman is a seasoned industrial security professional with a degree in electrical
engineering and over 15 years of experience in designing, troubleshooting, and securing
large-scale industrial control systems and the various types of network technologies they
utilize. After more than a decade of hands-on, in-the-field experience, he joined Rockwell
Automation in 2015 and is currently employed as Senior Consultant of Industrial
Cybersecurity with the Network and Security Services Group. He recently became a digital
nomad and now travels the world with his family while fighting cyber adversaries.
In the first place, I would like to thank my wife, Melissa, for her moral support while
writing this book and for enduring the many long nights of studying and experimenting
with cybersecurity that went into chasing my dream. Next, I would like to acknowledge the
Packt team of editors for all the hard work and dedication they put into this book. Special
thanks goes out to Sweeny Dias, who had the misfortune of trying to keep me on schedule
as I attempted to balance my personal, professional, and book-writing lives. I would also
like to acknowledge the fantastic team members I have encountered since taking on my role
with Rockwell Automation. Finally, I would like to thank all the individuals I have crossed
paths with and who have inspired me to pursue my passion for cybersecurity.
About the Reviewers
Richard Diver has over 20 years' experience in information technology across multiple
sectors and geographies. He has worked for the largest companies, such as Microsoft, and
also with smaller consultancies and business in the UK, Belgium, Australia, and the USA.
With a deep technical background in Microsoft products and strong experience with
strategy and architecture across industries, he is now focused on security to protect
sensitive information, business-critical infrastructure, end-user mobility, and identity
management.
Richard lives near Chicago with his wife and three daughters, and is passionate about
technology and bringing enthusiasm to every workplace.
Sanjeev Kumar Jaiswal is a computer science graduate with 8 years of industrial
experience. He uses Perl, Python, and GNU/Linux for his day-to-day activities. He is
currently working on projects involving penetration testing, source code review, security
design, and implementations. He is mostly involved in web and cloud security projects.
Sanjeev loves teaching to engineering students and IT professionals. He has been teaching
for the past 8 years in his leisure time. He is currently learning machine learning for
cybersecurity and cryptography.
He founded Alien Coders, based on the learning through sharing principle for computer
science students and IT professionals in 2010, which became a huge hit in India among
engineering students. You can follow him on Facebook at aliencoders, on Twitter at
@aliencoders, and on GitHub at aliencoders.
He wrote Instant PageSpeed Optimization and co-authored Learning Django Web
Development with Packt . He has reviewed more than seven books for Packt and looks
forward to authoring or reviewing more, from Packt as well as others.
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Table of Contents
Preface
1
Chapter 1: Industrial Control Systems
6
An overview of an Industrial control system 7
The view function 9
The monitor function 10
The control function 11
The Industrial control system architecture 12
Programmable logic controllers 13
Human Machine Interface 13
Supervisory Control and Data Acquisition 14
Distributed control system 14
Safety instrumented system 15
The Purdue model for Industrial control systems 16
The enterprise zone 18
Level 5 - Enterprise network 18
Level 4 - Site business planning and logistics 19
Industrial Demilitarized Zone 19
The manufacturing zone 20
Level 3 - Site operations 21
Level 2 - Area supervisory control 21
Level 1 - Basic control 21
Level 0 - Process 22
Industrial control system communication media and protocols 22
Regular information technology network protocols 23
Process automation protocols 24
Industrial control system protocols 25
Building automation protocols 26
Automatic meter reading protocols 27
Communication protocols in the enterprise zone 28
Communication protocols in the Industrial zone 30
Summary 31
Chapter 2: Insecure by Inheritance
32
Industrial control system history 33
Modbus and Modbus TCP/IP 35
Breaking Modbus 41
Using Python and Scapy to communicate over Modbus 51
Replaying captured Modbus packets 62
PROFINET 65
PROFINET packet replay attacks 67
S7 communication and the stop CPU vulnerability 70
EtherNet/IP and the Common Industrial Protocol 76
Shodan: The scariest search engine on the internet 79
Common IT protocols found in the ICS 86
HTTP 86
File Transfer Protocol 87
Telnet 89
Address Resolution Protocol 89
ICMP echo request 90
Summary 92
Chapter 3: Anatomy of an ICS Attack Scenario
94
Setting the stage 95
The Slumbertown paper mill 96
Trouble in paradise 98
Building a virtual test network 99
Clicking our heels 102
What can the attacker do with their access? 113
The cyber kill chain 143
Phase two of the Slumbertown Mill ICS attack 145
Other attack scenarios 149
Summary 151
Chapter 4: Industrial Control System Risk Assessment
152
Attacks, objectives, and consequences 152
Risk assessments 153
A risk assessment example 157
Step 1 - Asset identification and system characterization 157
Step 2 - Vulnerability identification and threat modeling 161
Discovering vulnerabilities 162
Threat modeling 174
Step 3 - Risk calculation and mitigation 187
Summary 188
Chapter 5: The Purdue Model and a Converged Plantwide Ethernet
189
The Purdue Enterprise Reference Architecture 190
The Converged Plantwide Enterprise 191
[ ii ]