Ransomware

Ransomware is a practical 53-page PDF book from oJAYo.com. How ransomware works and how to prevent, survive and recover.

Ransomware is malicious software that locks an organization’s files and systems until a ransom is paid, and today it almost always comes with data theft and threats to publish what was stolen. It is one of the most damaging cyber threats in the world: it has closed hospitals, halted factories and shut down schools and city councils.

This book explains ransomware for beginners: how the criminal business works, how attacks unfold, and above all how to prevent attacks, detect them early and recover if one succeeds. It is written for defenders and contains no instructions for building or using ransomware.

Why buy Ransomware?

• Created by the oJAYo team of security experts: written by practitioners, then technically reviewed and edited.
• Turns a big security topic into clear, practical steps you can use at work right away.
• 25 short, focused chapters you can read in one sitting each, so steady progress fits around a busy week.
• Plain-language explanations with diagrams, so you understand the why as well as the how.
• Up to date for 2026, covering today’s threats, tools and frameworks.
• Defensive and practical: checklists and real-world examples instead of jargon.
• Ready-to-use checklists you can take straight into your next project or review.
• Instant PDF download that works on any laptop, tablet or phone, yours to keep.

What you will learn

• What ransomware is
• A short history
• Ransomware by the numbers
• The ransomware business
• Extortion tactics
• How ransomware gets in
• Inside an attack
• Who gets targeted
• Lessons from well-known attacks
• Layered defence
• Patching and exposure
• Protecting identities
• Email and user defences
• Segmentation and least privilege

Who this book is for

• IT staff and beginners in security.
• Business owners and managers who must plan for an attack.
• Anyone who wants to understand one of the biggest threats in the news.

What is inside

• Format: PDF, instant download
• Length: 53 pages
• Chapters: 25
• Diagrams and screens: 17
• Created by: the oJAYo expert team (written, technically reviewed and edited)
• Publisher: oJAYo.com
• Published: 2026
• Series number: No. 94

Frequently asked questions

What does Ransomware cover?

Topics include “A short history”, “Ransomware by the numbers”, “The ransomware business”, “Extortion tactics” and “How ransomware gets in”, across 25 chapters with 17 diagrams and illustrated screens.

Who should read Ransomware?

IT staff and beginners in security. Business owners and managers who must plan for an attack. Anyone who wants to understand one of the biggest threats in the news.

Is it suitable for beginners?

Yes. No prior experience is assumed: each chapter explains the idea first and then shows how it works in practice.

What format is the book, and how do I get it?

It is a 53-page PDF. After checkout you get an instant download link, and you can read it on any device.

Is the content up to date?

Yes. It was written, reviewed and published in 2026 by the oJAYo team at oJAYo.com and reflects current versions, tools and practices.

Product, company and group names mentioned in this book are trademarks or names of their respective owners.

Get Ransomware for $49 and start reading in minutes.