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The Big Book of Breaches

The year’s most devastating attacks, how they happened, and what you can do about them

Every year, the cost and complexity of cyberattacks rise — and the trend shows no signs of slowing. From hospital shutdowns and stalled car sales to state-sponsored espionage, this collection examines the year’s most devastating breaches across critical industries.

What you'll learn:

  • How attackers infiltrated organizations like Change Healthcare, Microsoft, and Ticketmaster
  • The tactics and techniques they used mapped to MITRE ATT&CK
  • The hidden costs most headlines missed: revenue loss, reputational damage, and operational collapse
  • Microsegmentation strategies that could have stopped the spread

This report isn’t just a retrospective — it’s a wake-up call. If your defenses still rely on stopping every breach, you’re playing a losing game. Learn how to build resilience with Zero Trust and breach containment strategies that actually work.

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A poster reading 'Garter Cloud Security Hyper Cycle.'
Gartner Hype Cycle for Cloud Security, 2021 – Representative Vendor
A poster reading 'Forrester New Wave Leader 2022 for Micro-segmentation.'
Forrester New Wave™ for Microsegmentation – Leader
Logo for the 'Remote Tech Breakthrough Awards.'
CRN Partner Program Guide 2022 – Winner
A poster reading 'Garter Cloud Security Hyper Cycle.'
CRN Partner Program Guide 2022 – Winner
A poster reading 'Forrester New Wave Leader 2022 for Micro-segmentation.'
Global InfoSec Awards - Publisher’s Choice
Logo for the 'Remote Tech Breakthrough Awards.'
CRN Partner Program Guide 2022 – Winner
“We started seeing benefits from Illumio right away. We gained visibility into our environment and took decisive action immediately. We were able to move so quickly because Illumio makes Zero Trust Segmentation simple by highlighting risk and suggesting policy. Illumio allowed us to take a step-by-step approach and realize value out of the gate.”
Jamie Rossato

Chief Information Security Officer
Lion

Lion Co. employees inside a bottling factory discussing security.
“With Illumio, we now have unprecedented visibility into our server and application traffic. It is making all the difference in our ability to protect our data center.”
Mullar Wan

General Manager of Information Technology
Hongkong Electric

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“The onslaught of ransomware attacks demands end to end visibility, advanced analytics and automated actions based on an open platform—which are the foundational elements on which QRadar XDR was designed. By leveraging its open architecture and segmentation platforms like Illumio, QRadar XDR helps customers achieve early detection, orchestration, and rapid, automated response to ransomware and other fast-moving attacks."
Chris Meenan

VP of Product Management
IBM Security

Black & white photo of a cybersecurity technician analyzing server stacks.
“With Illumio, we now have unprecedented visibility into our server and application traffic. It is making all the difference in our ability to protect our data center.”
Mullar Wan

General Manager of Information Technology
Hongkong Electric

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Assume Breach.
Minimize Impact.
Increase Resilience.

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