A Hospital Held Hostage: Lessons from the NHS Ransomware Attack

Ryan Miller
June 13, 2024
Blog Posts

A Hospital Held Hostage: Lessons from the NHS Ransomware Attack


On June 3, 2024, a ransomware attack on Synnovis, a provider of pathology services, wreaked havoc across major NHS hospitals in London, including Guy’s and St Thomas’ and King’s College Hospital. This incident led to the cancellation of non-emergency operations, disrupted blood transfusions, and significantly impacted patient care. This story highlights the vulnerabilities in critical healthcare infrastructure and underscores the urgent need for robust cybersecurity measures​ (ITVX)​​ (NHS England)​​ (The Independent)​.

The Anatomy of the Attack

The ransomware attack was attributed to the Qilin cybercriminal group, known for its high-profile attacks targeting various global organizations. The attack on Synnovis led to a severe reduction in capacity, as pathology services, crucial for diagnosing and treating patients, were crippled. The immediate response included declaring a critical incident and prioritizing emergency care while redirecting other services to minimize disruption.

Lessons Learned and Insights

Vulnerability of Critical Infrastructure

This attack highlights how vulnerable critical infrastructure, such as healthcare, can be to ransomware attacks. According to the Veeam Ransomware Trends Report 2024, healthcare facilities are frequently targeted due to the high stakes involved in patient care, making them more likely to pay ransoms to quickly restore operations​.

Importance of Regular Backups and Immutability

A key takeaway from the Synnovis incident is the necessity of robust backup strategies. The Veeam report emphasizes that regular, immutable backups can mitigate ransomware impacts by ensuring that recent data remains accessible without ransom payments. Immutable storage, like that provided by Impossible Cloud, prevents backups from being altered or deleted by ransomware​​​​.

Need for Advanced Security Measures

The attack on Synnovis demonstrates that traditional security measures are insufficient against sophisticated ransomware. The Veeam report indicates that businesses implementing advanced security features such as multi-factor authentication (MFA), identity access management (IAM), and object lock experience significantly reduced impacts from ransomware attacks​​​.


The ransomware attack on NHS hospitals in London underscores the importance of comprehensive cybersecurity measures. To improve your ransomware protection strategy, Impossible Cloud can help with:

1. Integrating immutable offsite backups to ensure data integrity.

2. Enabling instant data protection with object lock and versioning.

3. Enhancing security with multi-layer encryption and identity access management (IAM).

4. Implementing multi-factor authentication (MFA) for an additional security layer.

5. Seamlessly integrating with leading cloud backup solutions for comprehensive protection.

By leveraging these features, you can secure your data and ensure you are protected from ransomware attacks in the future. 

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