Call 0203 834 9728 immediately — Coreitech engineers respond within 15 minutes. Do not pay the ransom and do not turn off affected machines.
RANSOMWARE
PROTECTION
LONDON
Prevention · Detection · Recovery Service · Incident Response
Coreitech provides ransomware protection for London businesses — multi-layer defence including NextGen EDR, email security, 24/7 monitoring, immutable backups, and a ransomware recovery service for businesses under active attack.
What to do if ransomware hits
your UK business
The first 60 minutes are critical. Follow this procedure exactly — wrong actions can make recovery impossible.
Coreitech's emergency team responds to active ransomware attacks across London and the UK. 15-minute response, on-site same day if required.
Ransomware protection services
for London businesses
NextGen Endpoint Detection & Response
Microsoft Defender for Business and Xcitium EDR — AI-powered behavioural analysis that detects ransomware before encryption begins. Not signature-based AV — behavioural detection that catches novel attacks.
Email Security & Anti-Phishing
Microsoft Defender for Office 365 with Safe Links, Safe Attachments, and anti-impersonation AI. Phishing is the #1 ransomware delivery method — we stop it at the inbox.
Immutable Cloud Backup
Ransomware-resistant backups with immutable storage — ransomware cannot encrypt or delete them. Tested monthly restores. 3-2-1 backup strategy with offsite copies.
24/7 Ransomware Monitoring
SOC monitoring detects ransomware behavioural patterns in real time — lateral movement, mass file encryption, shadow copy deletion — and triggers immediate automated and manual response.
Ransomware Incident Response
Active ransomware attack? We contain and eradicate within hours. Isolation, forensics, root cause analysis, safe recovery from clean backups, and post-incident hardening report.
Security Awareness & Phishing Training
Monthly simulated phishing campaigns and targeted training. Research shows this reduces click rates by 60–80% over 12 months — your human firewall is your first line of defence.
How ransomware attacks
UK businesses in 2026
Ransomware is malicious software that encrypts your business files — making them completely inaccessible — then demands a ransom payment for the decryption key. Modern ransomware attacks also exfiltrate data before encrypting, enabling double extortion: pay to decrypt AND to prevent publication of your client data.
How it enters London businesses: Over 90% of ransomware enters via phishing email. A staff member clicks a malicious link or opens an infected attachment — often appearing to come from HMRC, Royal Mail, Microsoft, or even a known colleague. Within hours, the ransomware has spread across shared drives and encrypted thousands of files.
Other entry points include unpatched software (attackers scan for businesses running Windows 10 past end-of-life or unpatched applications), exposed RDP ports, and compromised supply chain partners.
Why London SMEs are targeted: Ransomware groups specifically target businesses with 10–250 staff because they hold valuable data, typically have lower security maturity than enterprises, and are statistically more likely to pay rather than endure weeks of downtime. Law firms, financial services businesses, and professional services firms in London are prime targets due to the value of their client data.
Ransomware & UK cyber insurance
Ransomware protection & recovery
questions answered
Q.What is ransomware protection?
Ransomware protection is a multi-layered security approach that prevents ransomware from entering your network, detects it if it does, contains it before it can spread, and ensures you can recover without paying a ransom. Effective protection requires: email security (phishing prevention), NextGen EDR (behavioural detection), patch management (closing vulnerabilities), access controls (limiting blast radius), and immutable backups (guaranteed recovery).
Q.How does ransomware get into a London business?
The vast majority of ransomware attacks (over 90%) begin with a phishing email — a staff member clicks a malicious link or opens an infected attachment. Other entry points include unpatched software vulnerabilities (attackers scan for businesses running out-of-date software), exposed Remote Desktop Protocol (RDP) ports, stolen credentials used via MFA bypass, and supply chain compromise.
Q.What should I do if my business is hit by ransomware?
Immediately: (1) physically disconnect affected devices from the network — unplug ethernet, disable Wi-Fi; (2) do NOT turn off affected devices — this destroys forensic evidence; (3) call Coreitech's emergency line 0203 834 9728 immediately; (4) do not pay the ransom — around 30% of businesses that pay never receive a working decryption key; (5) preserve all evidence — photograph ransom notes, don't delete logs or emails. Time is critical — the faster you contain, the less data is encrypted.
Q.Can ransomware affect Microsoft 365 data?
Yes. Ransomware can encrypt files synced to OneDrive and SharePoint — the encrypted versions sync to the cloud, potentially overwriting your good copies. Microsoft 365 includes versioning and a 93-day recycle bin which can enable recovery, but this is not a guaranteed backup. Coreitech implements immutable third-party cloud backup for Microsoft 365 as an additional layer. We also ensure Microsoft Defender for Office 365 is properly configured to block the phishing emails that deliver most ransomware.
Q.What is the average cost of a ransomware attack on a UK SME?
Direct and indirect costs typically reach £85,000–£250,000 for a UK SME — including ransom payment (if made), data recovery, system rebuilding (typically 3–4 weeks), business interruption losses, GDPR notification costs, potential ICO fines, and reputational damage. Average downtime is 21 days. For many smaller London businesses, a ransomware attack is existential. The cost of prevention (Coreitech ransomware protection from £50/user/month) is a fraction of a single incident.
Q.What is a ransomware recovery service?
A ransomware recovery service provides technical support to restore your business after a ransomware attack — including forensic investigation to identify the attack vector, containment of the threat, data recovery from clean backups, safe rebuilding of infected systems, and post-incident security hardening. Coreitech provides emergency ransomware recovery for London businesses. Call 0203 834 9728 for immediate assistance.
Q.How much does ransomware protection cost for a London business?
Ransomware protection is included in Coreitech's managed IT packages from £50/user/month (Advanced plan) — covering EDR, email security, patch management, immutable backup, and 24/7 monitoring. Standalone ransomware protection tools bought individually typically cost significantly more. The ROI is immediate: one prevented ransomware incident saves tens of thousands of pounds in recovery costs.
Protect your London business
from ransomware today
Free security audit — we'll assess your current ransomware defences and identify gaps before an attacker does.