Over 300 UK Organisations Reported Ransomware Attacks. What Should Businesses Do Next?

Ransomware resilience is the ability to keep operating, limit harm and recover quickly after a ransomware event. Data from Report Fraud reveals that 323 organisations reported a ransomware attack between April 2025 and March 2026. More than half of those reports came from small and medium-sized enterprises, with SMEs accounting for 175 reported incidents.

The figure is concerning, but it is also likely to be an incomplete picture. Report Fraud notes that ransomware incidents are often underreported, particularly where organisations are concerned about financial loss, reputational impact, ransom payments or compliance implications. For UK businesses, the message is clear: ransomware is not just a large-enterprise issue. It is a live operational risk for organisations of all sizes, and resilience needs to be treated as a business capability, not just a technical control.

At CyPro, we treat ransomware resilience as a business capability that combines prevention, detection, response and recovery, and we help boards and IT leaders turn plans into tested practice. Ransomware resilience is a key part of that picture.

• Problem: Report Fraud data shows that 323 UK organisations reported ransomware attacks between April 2025 and March 2026, with SMEs accounting for more than half of those reports. This reinforces that ransomware is not limited to large enterprises or high-profile targets. It is affecting everyday UK organisations, many of which may have limited internal security capacity.
• Definition: Ransomware resilience is your ability to operate, limit damage and restore services after an attack.
• First steps: Run an attack surface review, verify isolated backups and run a tabletop incident exercise.
• Regulatory angle: The Information Commissioner’s Office expects demonstrable incident plans and timely notifications; see the ICO incident trends dataset.
• Support: At CyPro, we map controls to NIST and ISO 27001, test recovery, and embed runbooks so teams can act under pressure.

🛡 What is ransomware resilience?

Ransomware resilience is your organisation’s ability to keep operating, limit harm and recover quickly after a ransomware event. It covers prevention, detection, response, recovery, legal readiness and insurance, and matters for boards, IT teams and compliance leads in the UK.

At CyPro, we treat ransomware resilience as distinct from traditional cyber security because resilience accepts that some attacks will succeed and focuses on restoring services, protecting data and preserving trust.

Core technical and process components

Preventive controls include patching, endpoint defences and identity protections such as multifactor authentication. Detection requires continuous monitoring and timely alerts. Response needs tested playbooks, a nominated incident lead and communications plans. Recovery relies on isolated backups, clear Recovery Time Objectives (RTO) and rehearsed restore procedures. These components map to NIST’s Ransomware Risk Management guidance and ISO 27001 controls, which help structure practical programmes.

Why business and legal readiness matters

Legal readiness covers obligations under UK GDPR and notification requirements to the Information Commissioner’s Office (ICO), while the National Cyber Security Centre (NCSC) expects demonstrable incident planning and exercises. Senior teams must also consider ransom payment policy, insurer requirements and third party dependencies when assessing resilience.

How common failures show up

Attackers increasingly use credential theft and stealthy extortion, so detection gaps are common. Verizon’s 2025 Data Breach Investigations Report found a 37% year on year rise in certain attack types, which underlines the need for active detection Verizon, 2025. The National Cyber Security Centre reported the UK experienced multiple nationally notable attacks during 2025, highlighting that resilience planning must match the threat scale NCSC, 2025.

Practical first steps: Run an attack surface review, confirm isolated backup integrity, run a tabletop incident exercise and document decision rights. For hands-on support, consider our Cyber Resilience service or our IT Disaster Recovery Plan service to harden recovery capabilities.

📈 How bad is the ransomware problem in the UK in 2026?

The ransomware problem in the UK remains significant in 2026. According to Report Fraud, 323 organisations reported a ransomware attack between April 2025 and March 2026. Of those reports, more than 50% came from SMEs, with 175 reports made by small and medium-sized enterprises.

This matters because SMEs are often working with smaller IT teams, tighter budgets and less mature response arrangements. Attackers do not only target the largest organisations. They often target the easiest route in, whether that is weak credentials, exposed remote access, unpatched systems, limited monitoring or backups that have not been properly tested. Report Fraud also notes that ransomware incidents are likely to be underreported, meaning the real scale of the issue may be higher than the published figures suggest.

ENISA’s threat environment 2025 documents the shift to multifaceted extortion methods that combine theft, publication threats and encryption, which lengthen incidents and raise recovery costs. Verizon’s 2025 Data Breach Investigations Report recorded a roughly 37% rise in certain ransomware-related attacks year on year, showing rising volume and variety. The National Cyber Security Centre’s 2025 commentary reports the UK experiencing multiple nationally notable incidents weekly, underscoring risk to public and private sectors (NCSC, 2025).

Ransomware tactic	Typical impact	Recovery challenges
Encryption only	System downtime, potential data loss	Restore from backups, verify integrity
Data theft and extortion	Reputational harm, regulatory reporting	Forensic response, legal advice, notification under UK GDPR
Supply chain targeting	Wider business disruption, partner impact	Cross-organisation coordination, dependency mapping

Attack patterns now commonly include credential theft, long-term persistence and staged publication of exfiltrated data, which complicate containment and extend downtime. Mandiant’s analysis explains how these combined tactics increase negotiation pressure and recovery time. In practice, that means higher operational costs, longer service interruption and more complex dealings with the Information Commissioner’s Office when personal data is involved.

At CyPro, we recommend focusing on three defensive priorities to lift ransomware resilience: Faster detection, resilient and versioned backups, and strict access controls. Our Managed Detection and Response (MDR) gives 24/7 visibility to spot intrusions early, and our Cyber Resilience service helps design recoverable backup architectures. These measures reduce time to detect and time to recover, which materially lowers the business impact of modern attacks.

🕹️ What are the core controls to build ransomware resilience?

Layered controls are central to ransomware resilience. Organisations need preventative controls to reduce the chance of compromise, detection controls to identify suspicious activity early, containment controls to stop an incident spreading and recovery controls to restore critical services safely.

Technical controls

There is no single control that prevents ransomware. Effective ransomware resilience comes from layering technical controls across identity, endpoints, cloud environments, networks, backups and monitoring. The aim is to reduce the likelihood of compromise, limit attacker movement, detect suspicious activity early and recover quickly if systems are affected.

Key controls organisations should consider include:

• Immutable and isolated backups
  • Backups should be protected from modification or deletion, separated from the production environment and regularly tested through restore exercises. This helps ensure the organisation can recover without relying on compromised systems.
• Backup integrity and recovery testing
  • It is not enough to know backups exist. Organisations should regularly test whether critical systems and data can be restored within agreed Recovery Time Objectives (RTOs) and Recovery Point Objectives (RPOs). Regular recovery testing can also support wider Cyber Resilience planning by confirming whether recovery assumptions work in practice.
• Tenant hardening
  • Microsoft 365, Google Workspace and other cloud environments should be hardened to reduce common attack paths. This includes secure MFA configuration, conditional access, legacy authentication restrictions, mailbox forwarding controls, admin role reviews, external sharing restrictions and audit logging. This is often a useful area to review as part of Cyber Security as a Service or a broader Cyber Security Audit.
• Multi-factor authentication
  • MFA should be enforced across users, administrators, remote access, cloud services and privileged systems. Where possible, organisations should prioritise phishing-resistant MFA for higher-risk accounts.
• Privileged access management
  • Administrative privileges should be tightly controlled, time-bound and regularly reviewed. Day-to-day accounts should not hold standing admin rights, and privileged activity should be logged and monitored.
• Least privilege access
  • Users should only have access to the systems, folders and applications they need for their role. Limiting excessive permissions reduces the impact if an account is compromised.
• Endpoint Detection and Response
  • EDR or MDR tooling helps detect suspicious behaviour such as privilege escalation, credential dumping, lateral movement, unusual process execution and ransomware-style encryption activity. For organisations without internal monitoring coverage, Managed Detection and Response can provide continuous detection and response support.
• Runtime application controls
  • Controls should be used to prevent unauthorised executables, scripts and macros from running. This can include application allow-listing, controlled folder access, script blocking and restrictions on unknown or unsigned executables.

• Gold images for end-user devices
  • Maintaining approved baseline images for laptops and desktops allows devices to be rebuilt quickly and consistently after compromise. This supports faster recovery and reduces reliance on manual rebuild processes. Gold images should be considered as part of wider IT Disaster Recovery Plan and endpoint recovery planning.
• Secure configuration baselines
  • Servers, laptops, cloud services and network devices should be configured against secure baselines. This reduces the likelihood of attackers exploiting weak defaults or inconsistent configurations.
• Patch and vulnerability management
  • Known vulnerabilities, especially on internet-facing systems, VPNs, firewalls, remote access tools and critical applications, should be identified and remediated quickly. Regular Vulnerability Scanning helps organisations maintain visibility of technical weaknesses and prioritise remediation.
• Penetration testing
  • Periodic penetration testing helps identify exploitable weaknesses before attackers do. This is particularly valuable for internet-facing services, remote access routes and critical applications. A structured Penetration Testing programme can provide assurance that key systems are not exposing avoidable routes into the organisation.
• Attack surface assessment
  • Organisations should maintain visibility of exposed systems, domains, cloud services, remote access portals and unmanaged assets. Ransomware groups often exploit forgotten or poorly secured external services. An Attack Surface Assessment can help identify exposed assets and reduce the risk of overlooked entry points.
• Network segmentation
  • Critical systems, backups, servers and end-user networks should be segmented to limit lateral movement. If an attacker compromises one area, segmentation can help prevent the incident spreading across the wider environment.
• Email security controls
  • Phishing remains a common entry point for ransomware. Email filtering, attachment sandboxing, malicious link protection, DMARC, SPF and DKIM all help reduce exposure to credential theft and malware delivery. These controls should be supported by regular Cyber Awareness Training so users understand how to identify and report suspicious activity.

• Macro and script restrictions
  • Macros, PowerShell, JavaScript and other scripting tools should be controlled carefully, particularly where they are not required for normal business use.
• Remote access hardening
  • VPNs, remote desktop services and third-party access routes should be protected with MFA, restricted by policy, monitored and reviewed regularly. Exposed or poorly secured remote access remains a common ransomware entry point.
• Logging and monitoring
  • Security logs should be collected from key systems, including identity platforms, endpoints, servers, cloud services, firewalls and email platforms. Monitoring should focus on early signs of compromise, not just confirmed ransomware execution.
• Security Information and Event Management
  • SIEM tooling can help correlate suspicious activity across multiple systems, giving security teams better visibility of account compromise, lateral movement and unusual data access.
• Managed Detection and Response
  • For organisations without 24/7 internal security coverage, Managed Detection and Response can provide continuous monitoring, investigation and response support. This is particularly valuable because ransomware activity often escalates quickly and may occur outside working hours.
• Data loss prevention and exfiltration monitoring
  • Modern ransomware attacks often involve data theft before encryption. DLP, cloud access monitoring and unusual data transfer alerts can help identify suspicious movement of sensitive information.
• Admin account separation
  • Administrators should use separate accounts for privileged tasks. Admin accounts should not be used for email, browsing or routine business activity.
• Conditional access policies
  • Access should be restricted based on risk factors such as user location, device compliance, impossible travel, unfamiliar sign-in behaviour and high-risk applications.
• Device compliance controls
  • Only trusted, managed and compliant devices should be allowed to access corporate systems where possible. This helps reduce the risk posed by unmanaged or insecure endpoints.
• Third-party access controls
  • Supplier and contractor access should be time-bound, monitored and reviewed. Third parties should not retain unnecessary access to systems after their work is complete.

• Incident containment tooling
  • Security teams should be able to isolate devices, disable accounts, revoke sessions and block malicious indicators quickly during an incident. Speed matters when ransomware activity is underway. These capabilities should be built into Cyber Incident Response planning and tested through tabletop exercises.
• Encryption and key management
  • Sensitive data should be encrypted where appropriate, with keys protected and managed securely. This can reduce exposure if data is accessed or exfiltrated.
• Asset inventory and ownership
  • Organisations need to know what systems they have, who owns them and how critical they are. Without a reliable asset inventory, it is difficult to prioritise protection or recovery.

Together, these controls make ransomware harder to execute, easier to detect and less damaging when an incident occurs. The most effective programmes are not built around one tool or one project. They combine strong technical controls with tested recovery processes, clear ownership and regular assurance.

Process and governance

Technical controls only become effective when they are supported by clear ownership, tested processes and leadership decision-making.

An incident response plan should define who leads the response, who has authority to make decisions, how incidents are escalated and when legal, insurance, communications and regulatory stakeholders need to be involved. This should be supported by practical playbooks for common ransomware scenarios, including suspected account compromise, endpoint encryption, data exfiltration, supplier compromise and loss of access to critical systems.

Tabletop exercises and recovery rehearsals help validate whether those plans work in practice. They also expose gaps that may not be obvious on paper, such as unclear decision rights, missing supplier contacts, unrealistic recovery assumptions or delays in accessing forensic support.

Organisations should also track Recovery Time Objectives (RTOs) and Recovery Point Objectives (RPOs) for critical services and align them to business priorities. This gives leadership a clearer view of what level of disruption is acceptable, where investment is needed and which services should be restored first.

Supplier due diligence and contractual SLAs are also important. If a key third party is affected by ransomware, the organisation needs to understand how quickly that supplier can respond, what evidence they can provide and whether their recovery timelines align with business needs.

In our experience, organisations that combine layered technical controls with clear governance, frequent testing and supplier assurance are better placed to contain ransomware incidents, reduce downtime and recover with confidence.

🔁 What step by step actions should UK boards and security teams take now?

Boards should secure executive buy-in and fund a 12-step programme while security teams run risk assessments, deploy patches and backups, enforce MFA, and run tabletop exercises; assign owners and timelines for 30, 90 and 180 day milestones and collect regulator and insurer evidence.

Start with an explicit, board-approved objective: Measurable ransomware resilience that preserves revenue and client services. Security teams must map business-essential systems, prioritise recovery for those systems, and document Recovery Time Objectives (RTO) and Recovery Point Objectives (RPO) for each service. Legal and the Data Protection Officer (DPO) should be looped in to advise on UK GDPR notification requirements and insurer engagement.

Who owns each step

• Board ownership: Approve funding, risk appetite and insurance policy limits.
• CFO ownership: Confirm budget, vendor payments and insurance declarations.
• Chief Information Security Officer (CISO) or security lead: Run technical delivery, incident playbooks and exercises.
• IT operations: Implement backups, patching and restore drills.
• Legal and the DPO: Manage notifications under UK GDPR.
• Procurement: Verify supplier resilience and contractual SLAs. Insurers require named owners and evidence for controls.

Sequenced 12-step playbook

1. Board approval and budget.
2. Rapid risk assessment of essential systems.
3. Prioritised patching and endpoint protection.
4. Enforce Multi-Factor Authentication (MFA).
5. Immutable backups and tested restores.
6. Network segmentation and least privilege.
7. Endpoint detection and response tuning.
8. Tabletop exercises for executives and operational teams.
9. Incident response runbook, with legal and PR triggers.
10. Supplier assurance for key vendors.
11. Cyber insurance declaration pack.
12. Continuous measurement and reporting.

Timelines, evidence and testing

For short- and medium-term timelines, use 30-, 90-, and 180-day gates. In 30 days, complete the risk assessment, MFA roll-out and backup checks. In 90 days, finish patching and perform a first full restore test. In 180 days, run a cross-functional tabletop and capture evidence packs for the Information Commissioner’s Office (ICO), the Financial Conduct Authority (FCA), when applicable, and insurers.

Evidence packs should include asset inventories, RTO/RPO tables, backup restore logs, recent tabletop notes and supplier attestations. Use vulnerability scanning results and third-party testing to prove progress; our recommended next step is a focused Vulnerability Scanning engagement to create baseline evidence for insurers.

Practical insight: Industry guidance now expects measurable controls and documented plans. Gartner, 2025 highlights executive accountability for cyber outcomes, and NIST’s 2025 ransomware profile maps technical controls to recovery objectives, both useful for board-level briefings.

🔎 How do you choose a supplier for detection, response and recovery?

Pick a supplier who can detect quickly, respond decisively and restore services reliably, and who can price three realistic recovery scenarios. Suppliers should cover containment, investigation, and full-site restoration, with clear SLAs, forensic access, and subprocessor transparency.

Start by shortlisting suppliers that match your recovery appetite: A contained incident where systems remain online, a notable data exfiltration, and a full site restore requiring failover. Ask each supplier to price those three scenarios so you can compare real-world costs and timelines.

RFP and due-diligence questions

Demand these concrete answers: Average time to detect and contain, time to first meaningful action, restoration timelines for systems and data, forensic data retention and chain of custody, and whether the supplier operates a 24/7 Security Operations Centre (SOC). Check regulatory fit with the Information Commissioners Office (ICO) expectations for breach reporting and evidence handling, and confirm how the supplier supports UK GDPR obligations.

Contract and SLA clauses to review

Focus on Service Level Agreement (SLA) metrics for Time to Detect, Time to Contain and Recovery Time Objective (RTO). Insist on rights to forensic data, a clear subprocessor list, incident escalation paths, and exit assistance for service migration. Verify insurance, liability caps and whether the supplier will pay third-party forensics if needed.

How to test suppliers

Test suppliers with purple teaming, tabletop exercises and live playbooks. Ask for a scoped red team or tabletop that exercises forensic handover, insurer reporting, and full restore. Use the National Cyber Security Centre’s annual review as context when assessing threat exposure and supplier capability: National Cyber Security Centre, 2025. Cross-check supplier controls against the ENISA threat findings to ensure they cover modern extortion techniques: ENISA threat environment 2025.

At CyPro, we recommend asking suppliers for three priced scenarios, concrete SLAs and an exercise plan you can audit. If you need help framing the RFP or running tabletop tests, our Vulnerability Scanning and Red Teaming services are structured to produce the evidence insurers and boards expect.

📝 What real-world lessons do recent UK incidents teach, plus a short anonymised case study?

Boards should approve simple, tested recovery steps now: Keep isolated backups, limit privileged access and test supplier continuity plans regularly, because these three failures repeatedly made recovery slower and costlier in recent UK incidents.

Three concise lessons from recent incidents

1. Lesson one, backups often existed but were connected to the main network, which allowed attackers to corrupt or encrypt copies before restores were attempted.
2. Lesson two, excessive privileged access let attackers move laterally and reach sensitive data quickly.
3. Lesson three, cascading supplier failures amplified disruption when third parties lacked tested incident plans.

UK guidance and recent research back these points. ENISA, 2025 highlights data theft and multifaceted extortion as growing risks, and IBM X-Force, 2025 documents how credential theft enables rapid escalation.

Common technical and organisational failures

Technically, failures included insufficient network segmentation, missing immutable backups and slow detection of lateral movement. Organisationally, failures were weak supplier SLAs, unclear incident roles and no tested decision point for ransom demands. Together, these gaps undermine ransomware resilience by turning a recoverable breach into a prolonged outage.

These measures also help when speaking with insurers and regulators. Boards can approve four immediate steps: Require isolated, tested backups; mandate least privilege for admin accounts; demand supplier restore SLAs and exercise those plans every six months; and secure a rapid incident retainer. These steps directly address the failures we see in the UK and materially shorten recovery time.

❓ Frequently asked questions