Their EDR Missed 4 of 6 Zero-Day Ransomware Strains. RansomSnare Stopped All of Them.

Most K-12 school districts aren't sitting on sophisticated security stacks. They're running lean IT teams, aging infrastructure, and endpoint tools that were built for a different threat environment. That's not a criticism. It's just the reality of how public education operates.

A Michigan school district serving 7,500 students across 15 facilities knew this as well as anyone. They had MDR and EDR in place, which is more than a lot of districts can say. When a zero-day ransomware variant hit their environment, neither tool caught it.

The attack had no signature. It slipped through their existing defenses and targeted exactly the surfaces most EDR tools leave exposed: file servers, administrative workstations, and systems running legacy operating systems that vendors stopped supporting years ago.

First, They Tested What They Had

Before deploying anything new, SecuritySnares ran a ZeroDay Ransomware Simulation Test against the district's actual environment. The results weren't surprising, but they were useful. Six zero-day ransomware strains were tested in a controlled lab environment. Four of them were missed entirely by the district's existing EDR. All six were stopped by RansomSnare.

That gap between what security teams think they're covered for and what their tools actually catch is where most ransomware incidents happen. Knowing exactly where coverage ends gives IT teams something concrete to act on, rather than assumptions about protection they can't verify.

Deployment: Two Weeks, Zero Disruption

RansomSnare was deployed across 500 endpoints in two weeks, covering the district's highest-risk surfaces without touching the existing MDR and EDR stack. It works differently than signature-based tools: instead of identifying known malware, it terminates any untrusted process the moment it attempts to encrypt a file. No signatures, no internet connectivity, no update cycles. Less than 50 MB of RAM and 1% CPU per device.

That last point matters more in a school environment than it might elsewhere. Any tool that requires ongoing maintenance, specialized staff, or system restarts to update is a tool most districts can't realistically run.

The Results

The results held up in production. No student records compromised. No operational systems affected. No downtime, which matters in a school environment where any disruption ripples directly into classrooms and staff. Legacy endpoints running unsupported operating systems, previously unprotected, were secured for the first time.

"In the face of increased cybersecurity threats to schools across the country, maintaining continuity of learning is our top priority. SecuritySnares was quick and easy to implement and provides the reinforcement to our EDR system we needed to protect our data and our community."

— IT Director, Michigan K-12 School District

What This Means for K-12 Districts

For K-12 districts, the calculus on ransomware has shifted. Recovery is expensive, disruptive, and not always clean. Preventing encryption from happening in the first place is a fundamentally different starting point, and one that doesn't require replacing the tools already in place.

RansomSnare doesn't compete with MDR or EDR. It fills the gap those tools can't cover by design: unknown variants with no existing signature, legacy systems outside standard EDR support, and the critical window between when an attack begins and when a detection-based tool responds.

Read the Full Case Study

See how the ZeroDay Ransomware Simulation Test surfaced gaps the district didn't know they had, and how RansomSnare closed them: Read the full case study.

Or, request a live demo to run the same test against your own environment.

www.securitysnares.com