FBI Warns of New “Interlock” Ransomware Attacks Targeting U.S. Businesses

When was the last time you stopped to think,
“What would happen if all our company files were suddenly locked away?”

That’s exactly the nightmare scenario the FBI is warning about right now.
A new alert has been issued about a fast-growing ransomware group called Interlock—and manufacturers, infrastructure providers, and SMBs across North America are in their sights.

What Is the Interlock Ransomware Group?

Interlock appeared in September 2024 but has already built a reputation for targeting businesses in the U.S. and Europe.

Their goal is simple: money.

Here’s their playbook:

1. Break into your network quietly.

2. Steal sensitive data like financials, customer lists, and credentials.

3. Encrypt everything so you can’t access it.

4. Demand payment—usually within four days—or threaten to post your files on the dark web.

This “double-extortion” method (stealing + locking your files) has become standard for modern ransomware gangs. But Interlock is especially aggressive and unpredictable.

How Interlock Breaks In

Interlock uses clever tricks to slip past defenses:

• Fake browser or security updates that look legitimate.

• Booby-trapped websites that infect systems when clicked.

• Phishing emails that convince employees to open malicious attachments.

Once inside, they deploy malware that lets them:

• Spy on users

• Steal passwords

• Move laterally through the network

• Lock down files on both Windows and Linux systems

That means almost any business—from a machine shop in Boise to a food processor in Idaho Falls—could become a target.

Why SMBs and Manufacturers Are High-Risk Targets

Many small and mid-sized manufacturers believe ransomware only hits large corporations. Unfortunately, attackers know smaller companies often have fewer security tools and tighter budgets, making them easier targets.

For a manufacturer, the fallout can be devastating:

• Lost access to production data and engineering designs

• Shutdown of connected machines or ERP systems

• Missed orders and supply chain delays

• Permanent loss of customer trust

Even if you pay the ransom or recover from backups, the reputational damage can linger for years.

FBI Recommendations to Protect Your Business

The FBI’s advice is straightforward—and it aligns with TotalCare IT’s cybersecurity framework:

1. Keep Systems Patched and Updated

Outdated software gives hackers an open door. Regular updates help close those gaps.

Learn more: Managed Patch and Update Services for Idaho Businesses

2. Use Multi-Factor Authentication (MFA) Everywhere

That extra code you enter after your password is one of the simplest and most effective barriers against ransomware.

Explore MFA support under Cybersecurity Solutions

3. Enable Web Filtering and Firewalls

These tools block malicious websites and stop fake update pop-ups before employees ever see them.

4. Segment Your Network

Divide your systems so if one department or workstation is hit, the entire operation doesn’t go down.

5. Invest in Behavior-Based Security

Modern tools like Endpoint Detection & Response (EDR) can detect suspicious activity—like a ransomware file encrypting data—before it spreads.

Acting now is far cheaper and less painful than recovering after an attack.

Ransomware Isn’t Going Away—Prepare Now

Interlock isn’t the first ransomware threat, and it won’t be the last. But the companies that survive these attacks are the ones that take proactive action before something happens.

At TotalCare IT, we help manufacturers and SMBs in Boise, Idaho Falls, and across Eastern Idaho:

• Lock down endpoints and networks against ransomware

• Monitor systems 24/7 with behavior-based tools

• Maintain secure backups for disaster recovery

• Train teams to recognize phishing and fake updates

👉 Don’t wait for a ransom note to take cybersecurity seriously.
Schedule a Security Assessment with TotalCare IT today.

FAQs About Ransomware and the Interlock Threat

Q: What makes Interlock different from other ransomware groups?
They’re highly organized, fast-moving, and target both Windows and Linux environments—expanding their potential victim pool.

Q: Should small Idaho manufacturers worry about ransomware?
Absolutely. SMBs are targeted precisely because they’re seen as easier to breach.

Q: Is paying the ransom ever a good idea?
The FBI discourages payment—it fuels further attacks and doesn’t guarantee file recovery.

Q: What’s the best defense against ransomware?
A layered approach: patching, MFA, backups, and active monitoring.