FBI Warns Businesses About New “Interlock” Ransomware Threat
When was the last time you asked yourself, “What would happen if all my business files suddenly disappeared?”
That’s exactly the kind of nightmare the FBI is warning about right now. A new alert has been issued about a fast-growing ransomware group called Interlock — and it’s one every business owner should know about.
What Is Interlock Ransomware?
Interlock first appeared in September 2024, but in just a short time, it’s caused major problems for organizations across North America and Europe.
Their goal is simple — money. But the way they go about it is ruthless:
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Break in to your systems (often through fake updates or booby-trapped websites).
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Steal your sensitive data quietly, without you noticing.
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Encrypt your files, locking you out of your own systems.
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Demand payment, threatening to leak your data online if you don’t pay within a few days.
This is known as a “double extortion” attack — and it’s become the favorite tactic of modern cybercriminals. Unfortunately, Interlock is proving to be more aggressive and sophisticated than most.
How They Get In
Interlock’s hackers are skilled at tricking people. They often disguise their malware as fake security or browser updates, or set up infected websites that appear completely harmless.
Once inside, they use advanced tools to:
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Steal passwords and credentials
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Spy on your network activity
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Move through your systems
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Encrypt important files and lock you out
And they don’t stop at one platform — both Windows and Linux systems are at risk, which means nearly any business could be targeted.
Why Small Businesses Should Pay Attention
You might think ransomware only happens to big corporations — but that’s not true anymore. Small and mid-sized businesses (SMBs) are prime targets because cybercriminals know they often have limited security resources.
Losing access to customer records, financial data, or operational tools could bring your business to a standstill. Even if you recover, the reputation damage can last long after the attack.
What You Can Do Right Now
The FBI’s advice is clear — prevention is your best defense. Here are the key steps you should take:
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Keep software updated: Install patches and updates as soon as they’re available to close known security holes.
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Turn on multi-factor authentication (MFA): This simple extra step can stop most unauthorized logins.
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Use firewalls and web filters: They help block access to malicious websites and downloads.
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Segment your network: Separate systems so one breach doesn’t take down your entire business.
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Invest in modern security tools: Look for solutions that detect and stop suspicious activity before it spreads.
Taking action now costs far less — and causes far less stress — than trying to recover after a ransomware attack.
Stay Vigilant
The FBI doesn’t issue warnings like this without reason. Interlock is an active and growing threat, and every business — large or small — needs to take cybersecurity seriously.
If you’re unsure whether your systems are properly protected, or you want expert guidance on strengthening your defenses, get in touch. We can help you stay one step ahead of the next big ransomware threat.
Next Steps
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