Ransomware in Schools – Prevention and Recovery Plan
Ransomware is one of the most disruptive cyber threats facing UK schools today. It can lock staff out of MIS, files and safeguarding systems, delay exams and even close a school if backups and recovery plans are not in place.
Recent UK government data shows that cyber breaches are common across education, with over half of primary schools and around 70% of secondary schools reporting at least one breach or attack in the last year. National guidance from the NCSC describes ransomware as the UK’s most significant organised cyber crime threat.
This page explains what ransomware is and why it’s a serious threat to schools. It sets out a practical ransomware prevention, secure backup methods, detection and response strategy tailored to the education environment.
Your school’s ransomware awareness training should be part of your wider cyber security review for your school staff.
What Is Ransomware in Education?
Ransomware is a type of malicious software (malware) that encrypts data on devices and servers, making it unusable. The attackers then demand a ransom – often in cryptocurrency – in exchange for a decryption key or a promise not to leak stolen data.
In schools, ransomware can affect:
- File servers holding shared drives, planning documents and resources.
- MIS systems, particularly on-site servers.
- Finance or HR software.
- Safeguarding records and SEN files.
- Staff laptops and shared classroom PCs.
- Cloud storage, if synced files are encrypted, and changes are pushed to the cloud.
Because the school’s MIS often relies on wider infrastructure, access controls and backup arrangements, schools reviewing this risk may also find our guide to school MIS migration and integration strategy useful.
Even with backups, recovering from a ransomware attack can be time-consuming and costly. If backups are missing, untested or also encrypted, the impact on teaching, exams and safeguarding can be severe.
Why Ransomware Is a Growing Threat to Schools
The NCSC has issued multiple alerts about targeted ransomware attacks on the UK education sector, including schools, colleges and universities. They highlight several reasons why education is attractive to attackers:
- Schools hold sensitive data on pupils, staff and families.
- There are strong pressures to keep systems running during term time and exams.
- Many schools have limited internal IT capacity and complex, legacy systems.
- Staff are busy and may be more vulnerable to phishing or social engineering.
UK education-specific analysis has also shown that a high proportion of institutions have experienced cyber attacks in recent years, with ransomware repeatedly identified as a key concern.
The consequences of a successful ransomware attack can include:
- Loss of access to MIS, safeguarding and curriculum systems.
- Cancellation or disruption of lessons and assessments.
- Loss or exposure of personal data (leading to ICO reporting obligations).
- Reputational damage with parents and the local community.
- Additional costs for data recovery, new hardware, and external support.
That’s why preventing ransomware attacks now sits firmly within leadership, DPO and safeguarding responsibilities, not just “IT”.
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How Ransomware Attacks on Schools Typically Happen
Understanding how ransomware usually gets in helps shape your ransomware strategy. Common routes include:
- Phishing emails – malicious links or attachments that deliver malware or steal staff credentials.
- Compromised remote access – attackers abusing weak or unprotected remote access to servers or admin tools.
- Unpatched systems and software – vulnerabilities in outdated operating systems, applications or network devices.
- Infected USB drives or personal devices – malware introduced via removable media or unmanaged laptops.
- Supply-chain compromises – for example, a compromised third-party service or support tool used by the school.
In many incidents, attackers first gain a foothold (often through phishing), then move laterally, steal data, corrupt the local backup and only then deploy the ransomware payload.
Ransomware Prevention for Schools
There is no single control that stops ransomware, so national guidance emphasises a “defence in depth” approach: multiple layers of security across people, processes and technology.
Key elements of ransomware prevention include:
Patch and protect your systems
- Keep operating systems, applications and firmware up to date on servers, laptops, desktops and network devices.
- Retire or isolate unsupported systems wherever possible.
- Use modern antivirus/EDR on staff and critical devices, with central visibility.
The NCSC and DfE cyber security standards both highlight regular patching and secure configuration as core expectations.
Strengthen identity and access control
- Enforce strong passwords and, where possible, single sign-on for staff.
- Enable multi-factor authentication (MFA) for school staff accounts, particularly for email, MIS, finance and safeguarding systems.
- Limit the number of admin accounts and avoid using them for everyday work.
- Apply “least privilege”, so staff only have the access they genuinely need.
Reducing the risk that a stolen password leads to complete compromise is central to ransomware protection.
Reduce the impact of phishing
- Provide regular phishing awareness training for school staff.
- Use email security and anti-phishing tools to filter malicious messages.
- Give staff a simple process to report suspicious emails quickly.
Many ransomware incidents begin with a successful phishing email, so your prevention efforts should be closely linked to your phishing and staff training programmes.
Segment and secure your network
- Avoid a single flat network; separate staff, student and guest traffic.
- Limit access to critical servers and management interfaces.
- Consider putting high-value systems (e.g. MIS, finance) on more restricted segments.
Network segmentation doesn’t stop initial compromise, but it can significantly limit how far ransomware can spread.
Follow DfE and NCSC standards
The DfE Cyber Security Standards for Schools and Colleges summarise government expectations, including governance, patching, access control, backups and incident response. NCSC guidance on mitigating malware and ransomware provides technical detail on controls, planning and recovery.
Aligning your policies and technical measures with these standards strengthens both ransomware protection and your ability to demonstrate compliance.
Ransomware Backup and Recovery
Even with strong prevention, it’s vital to assume that an attack could still succeed and to plan for restoring data from offsite backup storage. Both the NCSC and DfE stress that restoring data from secure, tested backups is essential, and paying a ransom is not recommended. There is no guarantee you will get your data back!
Key principles for a ransomware-resilient offsite backup approach:
1. Follow a comprehensive backup strategy
- We recommend the 3-2-1 backup methodology (three copies, two storage types, one copy offsite/offline) to ensure backups remain resilient even if your network is compromised.
- Ensure MIS, file servers, safeguarding systems and key cloud data are all in scope. If you use a backup platform (e.g. Redstor), make sure full server/VM backups are enabled. If data only is selected, there will be longer downtime for your network.
- Include configuration data for key systems, not just user files.
DfE’s data backup security standard sets out expectations for how schools back up and store data securely so it can be restored after loss or damage, including ransomware.
2. Make backups resilient to ransomware
The NCSC’s principles for ransomware-resistant backups emphasise that backups should be:
- Resistant to deletion or encryption from compromised admin accounts.
- Stored separately from the main network where possible.
- Protected with their own access controls and, ideally, MFA.
- Regularly tested to ensure they can be restored quickly.
Using immutable or write-once storage and separating backup credentials from day-to-day admin accounts are essential parts of effective data security procedures.
3. Test your recovery regularly
- Carry out regular test restores of key systems (e.g. MIS, file servers).
- Measure how long it would take to restore teaching-critical services.
- Update your recovery plan based on what you learn.
A backup that has never been tested is a risk. Testing gives SLT and governors realistic expectations for downtime and supports your ransomware response planning.
Ransomware Detection and Response
Good ransomware detection can help you spot and contain an attack earlier, reducing damage.
Monitoring and alerts
- Use central logging and monitoring where possible – for example, from firewalls, servers and endpoint security.
- Watch for unusual patterns such as large volumes of file changes, disabled services or out-of-hours activity.
- Make sure alerts are actually reviewed, not just generated.
For many schools, this means working with an IT partner that provides monitoring and first-line ransomware detection as part of managed IT or security services.
A clear ransomware response plan
The NCSC and DfE both recommend having an incident response strategy that has been tested in realistic exercises. For schools, the plan should cover:
- Immediate technical actions – isolating affected devices, disconnecting parts of the network if needed.
- Roles and responsibilities – who leads the response, who talks to SLT, who liaises with external providers.
- Communication – how and when to inform staff, parents, the local authority or trust, and exam boards if relevant.
- Data protection – when to involve your DPO and whether an ICO report is required.
- Recovery – priority order for restoring systems from backups.
- Post-incident review – what went well, what needs to change.
Table-top exercises with SLT, your DPO and IT support can help ensure everyone understands the ransomware response steps before an incident happens.
Ransomware Insurance for Schools
Many schools and trusts now hold cyber insurance policies that may include cover for ransomware incidents, such as:
- Access to specialist incident response and forensics support.
- Cover for some recovery costs or business interruption.
- Legal and communication advice.
However, UK policy is increasingly evident that public sector bodies – including schools – should not be paying ransoms. Government statements and parliamentary answers confirm adherence to NCSC guidance, which does not encourage or endorse ransom payments, and there are proposals to ban public sector bodies from paying ransoms altogether.
Important points:
- Ransomware insurance is not a substitute for strong ransomware prevention and protection – insurers increasingly expect good controls to be in place.
- Policies vary, so SBMs, CFOs and trustees should understand what is and isn’t covered.
- Insurance can be valuable for expert support and recovery funding, but decisions around ransom payment should follow NCSC and DfE guidance.
- Insurers typically expect controls and evidence (MFA, patching, backups, incident response testing).
Your IT partner can often help you answer technical questionnaires from insurers and demonstrate that appropriate controls are in place.
Practical Ransomware Response Steps for School Staff
If you suspect a malware incident in your school:
- Don’t panic – act quickly and calmly.
- Isolate affected systems – disconnect infected devices from the network; if necessary, temporarily disable Wi-Fi or specific VLANs.
- Contact your ICT support or Classroom365 immediately – share what you’re seeing (screenshots, error messages).
- Inform your senior leadership team and DPO – they will need to consider data protection and safeguarding implications.
- Do not pay the ransom – NCSC does not recommend this and offers no guarantee of recovery.
- Begin recovery from clean backups, following your agreed priority order for systems.
- Record what happened – timelines, actions taken, systems affected – to support any reporting and lessons learned.
Afterwards, review your ransomware approach, backups/restores, detection and response controls and update your strategy accordingly.
How Classroom365 Helps Schools with Ransomware
Classroom365 specialises in cyber security for schools and MATs, including malware protection. We can help you to:
- Carry out a cyber security health check with a focus on ransomware risk.
- Align your controls with DfE cyber security standards and NCSC guidance.
- Design and implement backup and recovery solutions, including secure online and immutable backups.
- Improve ransomware prevention with patching, secure configuration, MFA, network segmentation and endpoint protection.
- Enhance ransomware detection through monitoring and alerting on key systems.
- Develop and exercise a practical ransomware response strategy with SLT, DPO and governors.
- Provide rapid support if you experience a suspected ransomware incident.
To understand how ransomware fits into your wider cyber risk, you can book a no-obligation cyber security consultation or just give us a call.
To return to our hub page on cyber safety in schools, please click here.
Frequently Asked Questions
Should a school pay a ransomware ransom?
In most cases, no. Paying a ransom doesn’t guarantee you’ll get your data back, and it can encourage further attacks. The safest approach is to contain the incident, involve your IT support and DPO, and recover from clean, tested backups where possible. If a ransomware demand includes threats to leak data, treat it as a potential data breach and follow your incident response process.
How long does it take a school to recover from ransomware?
It depends on how far the attack has spread, how many systems are affected, and the quality of your backup and recovery setup. For some schools, restoring key services can take hours to a day. For others, especially where servers, MIS, or backups are impacted, recovery can take several days. The biggest factor is whether you have tested restores and a clear priority order (e.g. safeguarding/MIS first, then shared drives and devices).
Does Microsoft 365 or Google Workspace protect schools from ransomware?
Cloud platforms provide strong security, but they don’t automatically protect you from ransomware or data loss. If a user account is compromised, attackers can delete data, encrypt synced files, or trigger mass changes that spread through sync. That’s why schools still need MFA, strong access controls, and a proper backup strategy for cloud data (especially SharePoint/OneDrive/Teams and Google Drive), alongside staff training and monitoring.
Sources and Further Reading
NCSC – Mitigating malware and ransomware attacks
NCSC – Alert: Targeted ransomware attacks on the UK education sector
UK Government – Cyber Security Breaches Survey 2024: Education Institutions Annex
DfE – Cyber security standards for schools and colleges and Data Backup and Recovery standard
NCSC – Ransomware-resistant backups principles
DSIT / Parliament – Statements on ransomware and public sector ransom payments
Mark Friend, BSc (Hons), is a Company Director at Classroom365 and has worked in technology for nearly 30 years. His IT career started with Rothschild Bank in Sydney, Australia, before working as a Global VPN Project Manager for the British Council. Mark has 20 years of experience in the UK education sector, helping schools integrate the latest tech into their curriculum and ICT vision.