Imagine a cyberattack that can lock every file on your network within one business day of getting in. That’s not a worst-case scenario anymore — it’s exactly what Microsoft is warning about with a ransomware strain called Medusa. And it’s targeting businesses just like yours.
Watch Albert’s take on this story:
What Happened
Microsoft has issued a warning about Medusa ransomware, a Chinese-developed threat that can complete full encryption of infected systems within 24 hours of initial compromise. The attack vector is web-facing systems — your email server, file transfer tools, and client portals — making it especially relevant for businesses that operate portals or remote access tools. Medusa is actively targeting healthcare, professional services, finance, and education organizations in the US, UK, and Australia.
What This Means for Your Business
Here’s the good news: patches are available, and staying current on system updates is one of the most effective defenses against this threat. That’s exactly why ACS requires that your computers stay on overnight — so we can push those patches before you start your day. If systems are being turned off every night, you’re slowing down one of the most important layers of your protection. For businesses using client portals or file transfer tools, now is the time to review who has access and whether your login requirements are hardened: multi-factor authentication, strong passwords, and limited internet exposure are all critical controls.
The Bottom Line
Medusa ransomware moves fast — 24 hours from infection to encryption. Keep computers on overnight so patches can deploy, review any web-facing tools your business runs, and make sure you have a reliable backup in place. If you’re not sure whether you’re protected, we can help you find out.
Questions about your security posture? Schedule a security review with ACS.
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