The CISO Playbook: The Adversarial Mindset: Security, Audit and Leadership Series
Autor Andres Andreu, Hector Monseguren Limba Engleză Hardback – 22 oct 2026
Harnessing the concept of decision advantage, the book moves beyond treating incidents as isolated technical events by thinking in adversary terms: objectives, constraints, and tradecraft. It bridges the gap between attacker methods and board-level risk, showing how to translate security outcomes into the language of economics, earnings before interest, taxes, depreciation, and amortization (EBITDA), and revenue protection.
Operationalizing lessons from real-world campaigns like SolarWinds, Volt Typhoon, and Operation Aurora, the text connects tradecraft to operational reality. It introduces the unique metric of time-to-hazard neutralization, moving past ticket metadata to focus on the verified removal of risk from the environment.
Spotlighting the rise of the “Artificial Adversary,” a central thread details how artificial intelligence (AI)-enhanced human actors and autonomous systems act with malicious intent. From industrialized “vibe hacking” to active scanning and autonomous reconnaissance, the book reveals how AI accelerates the attacker’s Observe, Orient, Decide, and Act (OODA) loop and how Chief Information Security Officers (CISOs) must respond by compressing their own defensive cycles.
Translating theoretical models into repeatable methods, the text provides strategies for terrain engineering, deception, and resilience-centric incident response. Written for CISOs, deputies, and security leaders, it serves those who both brief members of C-Suites and boards and also run outcome-based programs. Instead of remaining a reactive enforcer, readers will find a blueprint for becoming a proactive Enterprise Risk Leader. Navigating this shift ultimately rewards the disciplined observation required to outthink the opponent.
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Specificații
ISBN-13: 9781041200550
ISBN-10: 1041200552
Pagini: 320
Ilustrații: 22
Dimensiuni: 178 x 254 mm
Greutate: 0.75 kg
Ediția:1
Editura: CRC Press
Colecția CRC Press
Seria Security, Audit and Leadership Series
ISBN-10: 1041200552
Pagini: 320
Ilustrații: 22
Dimensiuni: 178 x 254 mm
Greutate: 0.75 kg
Ediția:1
Editura: CRC Press
Colecția CRC Press
Seria Security, Audit and Leadership Series
Public țintă
Professional Practice & Development, Professional Reference, and Professional TrainingCuprins
Chapter 1 - The Need to Understand the Adversary: 1.1 How Cyber Adversaries View Defenders, 1.2 Who Are the Adversaries?, 1.3 The Psychology of the Cyber Adversary, 1.4 Threat Intelligence and Adversary Analysis, 1.5 How to Adopt an Adversarial Mindset, 1.6 Benefits of Adopting an Adversarial Mindset, 1.7 Adversary Anecdote - MAC Attack at 30,000 Feet, 1.8 Historical Case Studies in Adversarial Thinking, 1.9 Case Study - The SolarWinds Attack (2020), 1.10 Understanding the Adversary as a Strategic Imperative, 1.11 Conclusion, References; Chapter 2 - The Motivations of Attackers: 2.1 The Psychological Drivers of Cybercrime, 2.2 The Forensic Psychology Perspective on Cybercriminals, 2.3 Socioeconomic and Cultural Factors of Cybercrime, 2.4 Case Study - The Twitter Hack (2020), 2.5 The Evolution of Cyber Threat Actors, 2.6 Adversary Anecdote - Boast, Toast, and Breach, 2.7 Leveraging the Adversarial Mindset, 2.8 Conclusion, References; Chapter 3 - Cognitive Biases and Decision-Making in Cyber Warfare: 3.1 Why Bias Matters to CISOs, 3.2 The Adversary’s Decision-Making Process, 3.3 Groupthink in Cybersecurity Teams, 3.4 Case Study - Operation Aurora (2009), 3.5 How CISOs Can Overcome Bias in Cybersecurity Leadership, 3.6 Adversary Anecdote - Deepfakes, Shallow Checks, 3.7 How CISOs Can Make Bias-Resistant Decisions, 3.8 Conclusion, References; Chapter 4 - The Attacker’s Toolbox – Techniques, Tactics, and Procedures: 4.1 Understanding the Attacker’s Approach, 4.2 Adversary Anecdote - Jackpot Pivot: Casino to Code, 4.3 Advanced Persistent Threats (APTs) - The Long Game, 4.4 Case Study - The Sony Pictures Hack (2014), 4.5 Building an Adversary-Focused Defense Strategy, 4.6 Conclusion, References; Chapter 5 - Acting Like an Attacker - Red Teaming for Leadership: 5.1 What Exactly is Red Teaming?, 5.2 Why CISOs Need Red Teaming in Their Security Strategy, 5.3 The Business Case for Red Teaming - Moving Beyond Compliance, 5.4 Understanding Red Teaming vs. Penetration Testing, 5.6 How CISOs Can Implement Red Teaming in Their Organizations, 5.7 Building a Realistic Adversary Simulation Program, 5.8 Integrating Adversary Simulations into Business Leadership, 5.9 Adversary Anecdote - Controls Don’t Coordinate Themselves, 5.10 Overcoming Common Challenges in Red Teaming, 5.11 Case Study - U.S. Department of Defense Cyber Table Top Exercises, 5.12 Some Examples of Red Teaming in Action, 5.13 The Future of Adversary Simulation - AI, Autonomous Agents, and the Next Frontier of Threat Emulation, 5.14 Conclusion, References; Chapter 6 - Cyber Deception and Psychological Warfare: 6.1 Cyber Deception, 6.2 Case Study - The Use of Deception Techniques in Exposing the APT1 Group, 6.3 Psychological Warfare, 6.4 Adversary Anecdote - Official Updates, Unofficial Backdoors, 6.5 Case Study - Israeli Cyber Warfare Tactics, 6.6 Conclusion, References; Chapter 7 - Breaking the Attacker’s Kill Chain: 7.1 Understanding the Cyber Kill Chain, 7.2 Disrupting the Kill Chain at Each Stage, 7.3 Adversary Anecdote - Cut the Wire, Cut the Story, 7.4 Conclusion, References; Chapter 8 - Adversary Informed Threat Intelligence - Turning Data into Action: 8.1 Understanding Threat Intelligence, 8.2 Why Threat Intelligence Fails in Many Organizations, 8.3 Adversary Anecdote - Indicators Don’t Defend, Teams Do, 8.4 Integrating Threat Intelligence into Security Operations, 8.5 Using MITRE ATT&CK for Intelligence-Driven Security, 8.6 Case Study - The Capstone Turbine Breach (2023), 8.7 Future of Cyber Threat Intelligence - AI-Driven Threat Prediction, 8.8 From Detection to Anticipation, 8.9 Conclusion, References; Chapter 9 - Adversary Informed Cyber Resilience and Incident Response: 9.1 What is Cyber Resilience?, 9.2 The Adversarial Informed Approach to Cyber Resilience, 9.3 Adversary Anecdote - Breaking News: You’ve Been Owned, 9.4 The Adversarial Informed Approach to Incident Response, 9.5 Case Study - The NotPetya Attack - A Cyber Resilience Success Story (2017), 9.6 The Role of AI in Next-Gen Incident Response, 9.7 Conclusion, References; Chapter 10 - The Artificial Adversary - AI Technologies: 10.1 AI Technologies in Cybersecurity, 10.2 Adversary Anecdote - Click Install, Ship Secrets, 10.3 Case Study - GTG-1002: The First Reported AI-Orchestrated Cyber-Espionage Campaign (2025), 10.4 Conclusion, References; Chapter 11 - The Artificial Adversary: 11.1 Offense - AI as a Weaponized Tool, 11.2 Defense - AI-Driven Capabilities and Strategies, 11.3 Autonomous Adversary - Beyond Human Control, 11.4 Case Study - RunSybil - Autonomous AI Agents Simulate Real-World Hacking (2024), 11.5 AI Governance, Security Frameworks, and Maturity Models, 11.6 Ethical and Legal Considerations, 11.7 Metrics and KPIs for AI Security Effectiveness, 11.8 Adversary Anecdote - Prompt, Paste, Profit, 11.9 Emerging Artificial Threat Trends, 11.10 Conclusion, References; Chapter 12 - The Future of the CISO as an Adversary Aware Entity: 12.1 Future Cyber Adversaries, 12.2 From Security Enforcer to Enterprise Risk Leader, 12.3 Building Decision Advantage, Not Just Defenses, 12.4 Adversary Anecdote - When the Pipes Talk, 12.5 Regulatory and Fiduciary Shifts, 12.6 Case Study - The Volt Typhoon Campaign (2023), 12.7 The Evolving Role of the CISO, 12.8 Conclusion; Appendix A - Example Adaptive IR Playbook - Ransomware With Possible Data Theft: Phase 0: Activation (T0 to T0+15m) - Containment, Phase 1: Evidence Preservation (ENTER once incident mode is declared; start by T0+60m; run in parallel through Phases 2–3), Phase 2: Initial Access and Privilege Check (start by T0+1h; checkpoint findings by T0+4h), Phase 3: Containment Hardening (ENTER after Gate A classification; begin immediately for A2 outbreaks, otherwise begin by T0+4h; core guardrails in place by T0+12h), Phase 4: Recovery Execution (begins after Gate D decision; typically ~T0+24h onward depending on scope/confidence), Phase 5: Post-Incident Improvements (T0+7d to T0+30d), Gate A: Scope Classification (complete by T0+30m), Gate B: Exfiltration / Double-Extortion Determination (start by T0+2h; re-assess at least every 2h until de-escalation), Strategic Note, Gate C: Eradication Confidence (before any restoration), Gate D: Restore Strategy Selection (decision by T0+24h; execute restore waves from T0+24h to T0+72h+ depending on scope/confidence); Appendix B - Mindset-Informed Adversary Emulation with Open-Source Tools: B.1 Objective, B.2 Tools and Building Blocks, Installing CALDERA with the Stockpile Plugin, B.3 High-Level Workflow, B.4 Roles and Responsibilities, B.5 Exercise 1: Mindset-Informed Emulation of APT29 (SolarWinds-Style Post-Compromise), Adversary Objective.
Notă biografică
Andres Andreu is currently the Chief Executive Officer (CEO) at Constella Intelligence, a 4X Chief Information Security Officer (CISO), and a renowned cybersecurity leader. He holds prestigious credentials including CISSP and ISSAP and is a Boardroom Certified Qualified Technology Expert (QTE). With a diverse career traversing federal government, corporate sectors, and entrepreneurial ventures in cybersecurity, he is a mentor, start-up advisor, and an acclaimed author.
His government tenure includes a significant impact in lawful intercept technology within federal law enforcement, earning three U.S. Department of Justice awards for his contributions to drug law enforcement. Transitioning to the corporate realm, Andres made a mark at Ogilvy & Mather as a partner and Chief Application Architect, later consulting for high-profile entities like the United Nations. As a founding member and key executive at Bayshore Networks (acquired by Opswat in 2021) and cybersecurity leader at Constella Intelligence, 2U, Inc./edX, and Hearst, his expertise has been pivotal in shaping varying cybersecurity landscapes.
Andreu’s leadership and innovative approaches have garnered him accolades such as a Top 100 CISO (C100) by Security Current, Top 50 Information Security Professional, and recognition in leading industry publications. His experience encompasses both offensive and defensive cybersecurity strategies, underpinned by a philosophy that balances executive and employee objectives.
Author of The CISO Playbook, Professional Pen Testing Web Applications, and contributor to 97 Things Every Application Security Professional Should Know, his work extends beyond writing to inventing, with patents in cybersecurity innovations. He is also an active member of the Forgepoint Capital Cybersecurity Advisory Council.
A Cuban immigrant and proud American citizen, Andres balances his professional achievements with a happy marriage and four wonderful kids. He is an international level certified Judo coach with USA Judo and an artist. Andreu’s multifaceted career and personal achievements highlight his profound impact on the cybersecurity field and beyond.
Hector Monsegur, known globally online as “Sabu,” is one of the most infamous names in the history of hacking. As the driving force behind the legendary hacking collective LulzSec, an offshoot of Anonymous, he spearheaded high-profile breaches against Sony Pictures, PBS, Fox.com, and multiple government systems. His campaigns during the early 2010s redefined the scale and spectacle of cyber intrusions, making him a symbol of the hacker underground and a pivotal figure in the evolution of digital security.
After his arrest in 2011, Monsegur shocked the world by cooperating with U.S. federal authorities, helping to disrupt major planned cyberattacks and prevent untold damage. This unexpected turn gave him rare insight into both sides of the cybersecurity battlefield – the tactics of hackers and the mechanisms of law enforcement. His transformation from blackhat to security insider is a story of redemption and reinvention, steeped in controversy, credibility, and unmatched real-world experience.
Today, Hector is Chief Research Officer at SafeHill, a cutting-edge cybersecurity research firm dedicated to protecting organizations from the kinds of threats he once unleashed. SafeHill’s services include elite penetration testing and its flagship threat exposure management platform, SafeHill SecureIQ, which enables businesses to identify, prioritize, and eliminate vulnerabilities before attackers can exploit them. Under his leadership, SafeHill is quickly earning a reputation as a disruptive force in the cybersecurity industry.
Beyond his work at SafeHill, Monsegur is an accomplished co-author, adjunct professor, and sought-after keynote speaker. He brings his signature edge and authenticity to classrooms, conferences, and boardrooms alike, training professionals and students to think like hackers while defending like strategists. His experience bridges underground hacking culture and enterprise-level security operations, making him one of the few experts who truly understands the full spectrum of cyber risk.
His government tenure includes a significant impact in lawful intercept technology within federal law enforcement, earning three U.S. Department of Justice awards for his contributions to drug law enforcement. Transitioning to the corporate realm, Andres made a mark at Ogilvy & Mather as a partner and Chief Application Architect, later consulting for high-profile entities like the United Nations. As a founding member and key executive at Bayshore Networks (acquired by Opswat in 2021) and cybersecurity leader at Constella Intelligence, 2U, Inc./edX, and Hearst, his expertise has been pivotal in shaping varying cybersecurity landscapes.
Andreu’s leadership and innovative approaches have garnered him accolades such as a Top 100 CISO (C100) by Security Current, Top 50 Information Security Professional, and recognition in leading industry publications. His experience encompasses both offensive and defensive cybersecurity strategies, underpinned by a philosophy that balances executive and employee objectives.
Author of The CISO Playbook, Professional Pen Testing Web Applications, and contributor to 97 Things Every Application Security Professional Should Know, his work extends beyond writing to inventing, with patents in cybersecurity innovations. He is also an active member of the Forgepoint Capital Cybersecurity Advisory Council.
A Cuban immigrant and proud American citizen, Andres balances his professional achievements with a happy marriage and four wonderful kids. He is an international level certified Judo coach with USA Judo and an artist. Andreu’s multifaceted career and personal achievements highlight his profound impact on the cybersecurity field and beyond.
Hector Monsegur, known globally online as “Sabu,” is one of the most infamous names in the history of hacking. As the driving force behind the legendary hacking collective LulzSec, an offshoot of Anonymous, he spearheaded high-profile breaches against Sony Pictures, PBS, Fox.com, and multiple government systems. His campaigns during the early 2010s redefined the scale and spectacle of cyber intrusions, making him a symbol of the hacker underground and a pivotal figure in the evolution of digital security.
After his arrest in 2011, Monsegur shocked the world by cooperating with U.S. federal authorities, helping to disrupt major planned cyberattacks and prevent untold damage. This unexpected turn gave him rare insight into both sides of the cybersecurity battlefield – the tactics of hackers and the mechanisms of law enforcement. His transformation from blackhat to security insider is a story of redemption and reinvention, steeped in controversy, credibility, and unmatched real-world experience.
Today, Hector is Chief Research Officer at SafeHill, a cutting-edge cybersecurity research firm dedicated to protecting organizations from the kinds of threats he once unleashed. SafeHill’s services include elite penetration testing and its flagship threat exposure management platform, SafeHill SecureIQ, which enables businesses to identify, prioritize, and eliminate vulnerabilities before attackers can exploit them. Under his leadership, SafeHill is quickly earning a reputation as a disruptive force in the cybersecurity industry.
Beyond his work at SafeHill, Monsegur is an accomplished co-author, adjunct professor, and sought-after keynote speaker. He brings his signature edge and authenticity to classrooms, conferences, and boardrooms alike, training professionals and students to think like hackers while defending like strategists. His experience bridges underground hacking culture and enterprise-level security operations, making him one of the few experts who truly understands the full spectrum of cyber risk.
Recenzii
The CISO Playbook: The Adversarial Mindset offers a compelling, practical contribution to contemporary cybersecurity leadership. Andres Andreu and Hector Monsegur combine executive insight with adversarial experience to show how security leaders can anticipate hostile behavior, strengthen organizational resilience, and make better decisions under uncertainty. Their central argument is clear: effective defense depends on understanding how adversaries think, what they seek to achieve, and how they exploit both technical weaknesses and organizational habits. One of the book's strengths is its integration of human behavior and operational security. The authors examine attacker motivations alongside the cognitive biases that influence defenders, prompting readers to question assumptions, recognize predictable responses, and sharpen their judgment. This approach gives the work relevance beyond technical cybersecurity, connecting security practice with psychology, intelligence analysis, organizational behavior, and strategic leadership. The book translates these ideas into practical applications through discussions of red teaming, cyber deception, threat intelligence, and incident response. Its case studies and adversarial narratives illustrate how individual weaknesses can combine to create consequential attack paths. The emphasis on testing assumptions and coordinating defensive action makes the book especially useful for leaders tasked with turning security knowledge into measurable improvements. Another important contribution is its treatment of the CISO as an enterprise risk leader. The authors link operational security to business continuity, financial exposure, executive accountability, and institutional trust. They urge security professionals to communicate in ways that enable informed decisions by boards and senior management. This perspective strengthens the relationship between cybersecurity programs and the organizations they serve.
The discussion of “decision advantage” provides a unifying theme. Information, technology, and expertise are most valuable when they enable an organization to recognize danger, choose an appropriate response, and act effectively. The proposed emphasis on time-to-hazard neutralization reinforces this outcomes focus by directing attention to verified defensive results.
The chapters on artificial intelligence extend the book’s relevance to a rapidly evolving threat environment. By considering AI-enabled adversaries alongside defensive applications and governance responsibilities, the authors invite readers to carefully examine the interplay among automation, human oversight, and organizational preparedness. The practical appendices further support this forward-looking approach by offering structured materials for exercises, planning, and response.
Accessible in style and broad in scope, The CISO Playbook will appeal to CISOs, security managers, intelligence analysts, incident-response professionals, and executives seeking a deeper understanding of cyber risk. It also offers valuable material for professional development and advanced education. Its lasting contribution is the link it establishes between adversarial understanding and responsible leadership: resilient organizations learn continuously, challenge their assumptions, and translate insight into coordinated action.
Prof.dr Darko TRIFUNOVIĆ, Director
Institute for National and International Security-INIS
A security program can look good on paper and still leave people unprepared when a difficult decision needs to be made. The CISO Playbook: The Adversarial Mindset gets into that territory. Andres Andreu and Hector Monsegur challenge leaders to look at their programs through an attacker’s eyes, including the assumptions, slow decisions, and gaps between teams that can leave an organization exposed. The discussions around cognitive bias and red teaming give leaders useful questions to bring back to their teams. Who has the authority to act? Can someone challenge a decision without being shut down? Have we practiced how we will respond when things don’t go according to plan? Those conversations are much easier to have before an incident forces them on us.
The book’s strongest contribution is connecting that adversarial perspective to the everyday responsibility of leading a security program. Testing response and recovery, making ownership clear, and checking that a threat has actually been removed are practical habits that matter far more than how many tickets we close. Some sections revisit familiar ground, and I would approach the more ambitious AI claims with a critical eye. Even so, this is a worthwhile book for CISOs and other security leaders who want to challenge their assumptions and have better conversations about readiness. There is useful material here to work through with a team, especially if the goal is to turn discussion into better decisions.
Kevin L. McLaughlin, PhD
I've known Andres Andreu's work for some time, and I've always appreciated his willingness to challenge conventional thinking in cybersecurity. His collaboration with Hector Monsegur on The CISO Playbook: The Adversarial Mindset brings together two very different experiences in cybersecurity, which is what makes this book worth reading.
Having spent much of my career in enterprise security architecture and CISO roles, I've become increasingly frustrated with how our industry measures security effectiveness. We continue to invest in technology, implement frameworks, and assess compliance, yet organizations still struggle with many of the same problems. I think part of the reason is that we've become very good at describing what security should look like without always understanding how it actually performs when challenged. Andres and Hector approach this problem from the adversary's perspective. Their argument is that security leaders need to understand the motivations and behavior of the people they're defending against. I agree with that, although I think the real value of the book comes from examining how attackers exploit the assumptions we make about our own organizations.
The combination of Andres's enterprise security leadership experience and Hector's background in offensive operations works well. The case studies and adversarial anecdotes provide some interesting insight into how attackers approach their objectives and why conventional defensive thinking can fall short. I particularly liked the discussion around cognitive bias and decision-making. It's an area that deserves more attention because our own assumptions about how security works can become vulnerabilities themselves.
From an architecture perspective, I've always believed that understanding dependencies is fundamental to understanding risk. Attackers look for opportunities. I've seen organizations with reasonably mature security programs struggle because the individual components of their security architecture weren't working together as expected. The authors' discussion of red teaming reinforces why testing those relationships matters.
Understanding how an attacker thinks is certainly valuable, but I've seen organizations that understood their threats and still couldn't make the necessary decisions to address them. Knowing what needs to happen doesn't mean the business is capable of implementing the necessary changes. I've come to believe that many of our cybersecurity problems are actually organizational problems. We continue to manage security, risk, compliance, and operations through separate functions, each with its own priorities and measures of success. An adversary has no reason to respect those boundaries. I think the adversarial mindset Andres and Hector describe is an important part of addressing this.
The AI discussion is also timely. I found the examination of autonomous adversaries particularly interesting because it raises questions about our own use of AI in defensive operations. We can certainly automate more decisions and accelerate response, but I remain concerned about how organizations establish authority and accountability for those decisions. The book does address rules of engagement and measures for evaluating autonomous actions, which I appreciated. This will become an increasingly important responsibility for CISOs as AI moves further into operational decision-making.
I also agree with the authors' position that the CISO needs to become more of an enterprise risk leader. I've advocated for that evolution for years. My concern is that organizations often expect CISOs to assume broader responsibility without changing the governance structures that limit their influence. We can encourage security leaders to think differently, but unless the organization changes how decisions are made, we're only solving part of the problem.
I enjoyed the book because it challenges some of the assumptions that have shaped cybersecurity for years. There's useful material here for experienced CISOs, security architects, and those moving into leadership roles. Andres and Hector ask security leaders to better understand the people and systems working against them. The practical examples give readers something they can apply, particularly around adversary emulation and incident response.
Patrick M. Hayes
Author, Speaker, & Advisor
Integrated Assurance LLC.
The discussion of “decision advantage” provides a unifying theme. Information, technology, and expertise are most valuable when they enable an organization to recognize danger, choose an appropriate response, and act effectively. The proposed emphasis on time-to-hazard neutralization reinforces this outcomes focus by directing attention to verified defensive results.
The chapters on artificial intelligence extend the book’s relevance to a rapidly evolving threat environment. By considering AI-enabled adversaries alongside defensive applications and governance responsibilities, the authors invite readers to carefully examine the interplay among automation, human oversight, and organizational preparedness. The practical appendices further support this forward-looking approach by offering structured materials for exercises, planning, and response.
Accessible in style and broad in scope, The CISO Playbook will appeal to CISOs, security managers, intelligence analysts, incident-response professionals, and executives seeking a deeper understanding of cyber risk. It also offers valuable material for professional development and advanced education. Its lasting contribution is the link it establishes between adversarial understanding and responsible leadership: resilient organizations learn continuously, challenge their assumptions, and translate insight into coordinated action.
Prof.dr Darko TRIFUNOVIĆ, Director
Institute for National and International Security-INIS
A security program can look good on paper and still leave people unprepared when a difficult decision needs to be made. The CISO Playbook: The Adversarial Mindset gets into that territory. Andres Andreu and Hector Monsegur challenge leaders to look at their programs through an attacker’s eyes, including the assumptions, slow decisions, and gaps between teams that can leave an organization exposed. The discussions around cognitive bias and red teaming give leaders useful questions to bring back to their teams. Who has the authority to act? Can someone challenge a decision without being shut down? Have we practiced how we will respond when things don’t go according to plan? Those conversations are much easier to have before an incident forces them on us.
The book’s strongest contribution is connecting that adversarial perspective to the everyday responsibility of leading a security program. Testing response and recovery, making ownership clear, and checking that a threat has actually been removed are practical habits that matter far more than how many tickets we close. Some sections revisit familiar ground, and I would approach the more ambitious AI claims with a critical eye. Even so, this is a worthwhile book for CISOs and other security leaders who want to challenge their assumptions and have better conversations about readiness. There is useful material here to work through with a team, especially if the goal is to turn discussion into better decisions.
Kevin L. McLaughlin, PhD
I've known Andres Andreu's work for some time, and I've always appreciated his willingness to challenge conventional thinking in cybersecurity. His collaboration with Hector Monsegur on The CISO Playbook: The Adversarial Mindset brings together two very different experiences in cybersecurity, which is what makes this book worth reading.
Having spent much of my career in enterprise security architecture and CISO roles, I've become increasingly frustrated with how our industry measures security effectiveness. We continue to invest in technology, implement frameworks, and assess compliance, yet organizations still struggle with many of the same problems. I think part of the reason is that we've become very good at describing what security should look like without always understanding how it actually performs when challenged. Andres and Hector approach this problem from the adversary's perspective. Their argument is that security leaders need to understand the motivations and behavior of the people they're defending against. I agree with that, although I think the real value of the book comes from examining how attackers exploit the assumptions we make about our own organizations.
The combination of Andres's enterprise security leadership experience and Hector's background in offensive operations works well. The case studies and adversarial anecdotes provide some interesting insight into how attackers approach their objectives and why conventional defensive thinking can fall short. I particularly liked the discussion around cognitive bias and decision-making. It's an area that deserves more attention because our own assumptions about how security works can become vulnerabilities themselves.
From an architecture perspective, I've always believed that understanding dependencies is fundamental to understanding risk. Attackers look for opportunities. I've seen organizations with reasonably mature security programs struggle because the individual components of their security architecture weren't working together as expected. The authors' discussion of red teaming reinforces why testing those relationships matters.
Understanding how an attacker thinks is certainly valuable, but I've seen organizations that understood their threats and still couldn't make the necessary decisions to address them. Knowing what needs to happen doesn't mean the business is capable of implementing the necessary changes. I've come to believe that many of our cybersecurity problems are actually organizational problems. We continue to manage security, risk, compliance, and operations through separate functions, each with its own priorities and measures of success. An adversary has no reason to respect those boundaries. I think the adversarial mindset Andres and Hector describe is an important part of addressing this.
The AI discussion is also timely. I found the examination of autonomous adversaries particularly interesting because it raises questions about our own use of AI in defensive operations. We can certainly automate more decisions and accelerate response, but I remain concerned about how organizations establish authority and accountability for those decisions. The book does address rules of engagement and measures for evaluating autonomous actions, which I appreciated. This will become an increasingly important responsibility for CISOs as AI moves further into operational decision-making.
I also agree with the authors' position that the CISO needs to become more of an enterprise risk leader. I've advocated for that evolution for years. My concern is that organizations often expect CISOs to assume broader responsibility without changing the governance structures that limit their influence. We can encourage security leaders to think differently, but unless the organization changes how decisions are made, we're only solving part of the problem.
I enjoyed the book because it challenges some of the assumptions that have shaped cybersecurity for years. There's useful material here for experienced CISOs, security architects, and those moving into leadership roles. Andres and Hector ask security leaders to better understand the people and systems working against them. The practical examples give readers something they can apply, particularly around adversary emulation and incident response.
Patrick M. Hayes
Author, Speaker, & Advisor
Integrated Assurance LLC.
Descriere
Guiding security leaders and executives who hold the privilege of defending modern organizations, “The CISO Playbook - The Adversarial Mindset” is a leadership-focused blueprint for outmaneuvering adversaries that iterate relentlessly.