Case Study: Ransomware Recovery, Back Online by Monday Morning

Introduction

A 45-employee industrial supply company in Mississauga was hit with ransomware on a Friday evening. By the time leadership understood the scope of the incident, every server, file share, and workstation was showing a ransom demand. Fusion isolated the attack, restored from verified air-gapped recovery points, and had staff back online by Monday morning — without paying the ransom. This is what Fusion’s cybersecurity services look like when they matter most.

This case study covers a real Fusion Computing engagement. Client details have been anonymized at the client’s request.

The Challenge

This was not a situation where generic help-desk support was enough. The business needed containment, verified clean recovery points, and a team that could move fast enough to keep Monday from becoming a full operational shutdown.

Fusion’s earlier cybersecurity assessment had already found the recovery posture unreliable. Backup jobs were inconsistent, restore testing was weak, and leadership had no confidence that a real weekend incident could be recovered cleanly. If the company could not trust its backups, it was staring at the possibility of a six-figure ransom payment, extended downtime, and a hard conversation with customers on Monday morning.

The stakes were not unusual. According to Sophos’ 2025 State of Ransomware report, the average cost of recovering from a ransomware attack — excluding the ransom itself — was $1.53 million USD. For a 45-employee industrial supplier, even a fraction of that figure, compounded by missed shipments and lost customer confidence, would have been devastating.

“I got the call no business owner wants. Our systems were locked and there was a ransom demand on every screen. Fusion had someone working on it within the hour, and by Monday morning our team walked in, sat down, and got back to work like nothing happened.”

Sandra M., CEO, Industrial Supply Company, Mississauga

Fusion Computing’s Ransomware Incident Response

Fusion treated the situation as both an incident response problem and a recovery problem. The response followed a structured containment-investigation-recovery sequence — not a panicked scramble to get systems back online before understanding what happened.

Friday Evening: Containment (Under 60 Minutes)

Fusion’s on-call team received Sandra’s call at approximately 9pm on a Friday. Within 40 minutes, affected systems were isolated to stop lateral spread. Network segments were cut, compromised accounts were disabled, and the attack perimeter was mapped.

Containment speed matters. According to Verizon’s 2024 Data Breach Investigations Report, ransomware and extortion-related breaches appeared as a top threat across 92% of industries surveyed. Once attackers have a foothold, every hour of delay expands the blast radius.

Saturday: Investigation and Recovery Preparation

With the attack contained, Fusion confirmed the initial attack path: a compromised credential that gave the attackers access to an administrative account. From there, they had moved laterally across the network, escalating privileges before deploying the ransomware payload.

Critically, Fusion verified that the company’s air-gapped backup infrastructure had not been compromised. This is not something to take for granted. Sophos’ 2025 data found that 94% of organizations hit by ransomware reported that attackers attempted to compromise their backup infrastructure, and 57% of those attempts succeeded. In this case, the attackers had not reached the air-gapped recovery points, which meant Fusion had clean, verified data to restore from.

Saturday was spent validating recovery points, prioritizing systems by business criticality (ERP and order management first, then file shares, then workstations), and preparing the restored environment with hardened security controls that would go live alongside the recovery.

Sunday: System Restoration and Validation

ERP, file shares, and line-of-business systems were restored from verified air-gapped recovery points. Each restored system was validated against known-clean baselines before being reconnected to the network. Fusion did not simply restore and hope — every system was checked for persistence mechanisms, backdoors, and residual malware before it went back into production.

Monday 7:00 AM: Business Reopens

Staff walked in Monday morning and got back to work. Every file was recovered. No data was lost. The attackers’ approximate demand of $180,000 in Bitcoin was never paid, and downtime was contained to the weekend while the office was closed.

For context: Sophos’ 2025 ransomware survey found that only 16% of victims fully recovered within a day and 53% recovered within a week. Full-environment weekend recovery depends heavily on clean, tested backups and disciplined containment — exactly the preparation Fusion had put in place before the incident.

What Would Have Happened Without Preparation

It is worth being direct about what the alternative looked like. If Fusion had not already assessed the client’s environment and established air-gapped recovery points:

• The backups would likely have been compromised. The client’s original backup configuration — before Fusion rebuilt it — had no air-gap, no immutability, and no tested restore process. Sophos’ data shows that more than half of backup compromise attempts succeed.
• Recovery would have taken weeks, not days. Without verified recovery points, the company would have faced bare-metal rebuilds, manual data reconstruction, and an extended operational shutdown.
• The ransom decision would have been real. The Canadian Centre for Cyber Security is clear: there is no guarantee that threat actors will unlock systems or return stolen data after payment. Threat actors can copy the data and use it to revictimize an organization or its customers for more money.
• Customer and insurance fallout. An extended outage for an industrial supplier means missed delivery commitments, production delays for customers, and an insurance claim that raises hard questions about the security controls that were — or were not — in place.

Results and Business Impact

The business resumed full operations Monday morning with 100% data recovery and $0 ransom paid. Downtime was contained to the weekend while the office was closed. But the recovery was only half the story — the incident forced a stronger security baseline into place immediately after.

• MFA enforced across all accounts within 48 hours. The compromised credential that gave the attackers their initial foothold would not have worked if MFA had been in place.
• Huntress endpoint detection and response deployed to every workstation and server. Huntress provides managed threat detection specifically built for the SMB environment.
• Immutable offsite backups moved to a verified monthly test cycle. The air-gapped backup infrastructure that saved the company is now tested monthly with documented restore verification.
• Quarterly phishing simulations and staff awareness training rolled out. The initial compromise came through a credential. Human factors require ongoing reinforcement.

These controls are now part of the client’s ongoing managed IT service with Fusion — not a one-time remediation that fades after the crisis passes.

Why This Ransomware Recovery Mattered

This was not just a technical recovery. It protected customer operations, avoided a six-figure ransom payment, and gave leadership a security baseline they could actually defend going forward.

The Canadian Centre for Cyber Security’s Ransomware Threat Outlook 2025-2027 assesses that all Canadian organizations, regardless of size or sector, are at risk of being targeted by ransomware. The Centre notes that smaller organizations often face particular challenges because they have fewer cybersecurity resources to respond. Basic cyber hygiene — software updates, MFA, backups, and phishing awareness — remains the foundation of ransomware resilience.

For the client, the outcome was simple: under one hour to senior response, 100% data recovered, $0 ransom paid, and a security posture that is now genuinely defensible.

For businesses evaluating their own readiness, the question is not whether ransomware will target you. It is whether your current IT environment — your backups, your access controls, your incident response capability — would hold up if someone tested it on a Friday night.

You can also download the PDF version of this case study.

Frequently Asked Questions About Ransomware Recovery

Q. How long does ransomware recovery take?
A. It depends entirely on preparation. In this case, Fusion restored the client’s full environment — servers, ERP, file shares, and workstations — over a single weekend. Sophos’ 2025 ransomware survey found that only 16% of victims fully recovered within a day and 53% within a week. Businesses without clean, tested backups can face weeks of downtime and may never fully recover their data.

Q. Should you pay the ransom?
A. The Canadian Centre for Cyber Security is clear: there is no guarantee that threat actors will unlock systems or return stolen data after payment. Attackers can copy data and use it to revictimize an organization or its customers. In this case, the demand was never paid because Fusion had verified, air-gapped recovery points ready to restore. The best protection is preparation, not payment.

Q. What should a business do immediately after a ransomware attack?
A. Isolate affected systems to stop the attack from spreading. Do not shut down machines — some forensic evidence lives in memory. Contact your IT provider or incident response team immediately. Do not attempt to negotiate with the attackers on your own. The first hour matters more than anything that follows.

Q. How can a business prevent ransomware attacks?
A. No single control prevents ransomware. The Canadian Centre for Cyber Security recommends basic cyber hygiene as the foundation: regular software updates, MFA, tested backups, and caution with phishing. Beyond the basics, effective protection requires endpoint detection and response (Fusion uses Huntress), email security, vulnerability management, and staff awareness training. Fusion’s cybersecurity services cover all of these as part of ongoing managed operations.

Q. What is an air-gapped backup and why does it matter?
A. An air-gapped backup is a copy of your data stored on infrastructure that is physically or logically isolated from your production network. Attackers cannot encrypt or delete what they cannot reach. Sophos found that 94% of ransomware attacks included attempts to compromise backup infrastructure, and 57% of those attempts succeeded. In this case study, Fusion’s air-gapped recovery points were the reason the company could recover without paying the ransom.

Fusion provides managed IT support across Toronto and the GTA – including the proactive monitoring and backup discipline that made this recovery possible.