Stop the Attack

Ransomware Defence: How Attacks Unfold and What Stops Them

Follow a ransomware attack from first access to encryption, and see which controls break the chain at each step.

11 Chapters 66 min Published October 8, 2026
Chapters

Explore the Ransomware Guide

Eleven chapters, each one readable on its own. Most include a tool you can use as you read.

How a modern ransomware attack unfolds

Ransomware is rarely a single event. It is a chain of steps over days or weeks, and each step is a chance to stop it.

6 min read Read chapter

Initial access: phishing, exposed services and stolen credentials

Most attacks start with a phishing email, an unpatched remote service or credentials bought from a previous breach.

7 min read Read chapter

Privilege escalation and lateral movement

Once inside, attackers look for admin rights and move between systems using legitimate tools.

8 min read Read chapter

Data theft before encryption: double extortion

Attackers copy sensitive data first, so they can threaten to publish it even if you restore from backup.

4 min read Read chapter

Hardening identity: MFA, privileged access and service accounts

Identity is the main battleground. Strong authentication and tight privileged access block many attack paths.

5 min read Read chapter

Patching and exposure management that keeps pace

Attackers exploit known vulnerabilities within days of disclosure, especially on internet-facing systems.

6 min read Read chapter

Endpoint detection and 24/7 monitoring

EDR tools and a team watching alerts around the clock catch attacks that slip past prevention.

7 min read Read chapter

Backups that survive an attack

Attackers target backups first. Backups need to be isolated, immutable and tested.

8 min read Read chapter

Network segmentation that limits the blast radius

Segmentation stops an attacker in one part of the network from reaching everything else.

4 min read Read chapter

Testing your defences with simulated attacks

Penetration tests and attack simulations show whether your controls work against real techniques.

5 min read Read chapter

A ransomware readiness checklist for the next quarter

A short list of actions that give the most protection in the next three months.

6 min read Read chapter

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