FBI issues new ransomware warning
Understanding the Threat: Interlock Ransomware and How to Protect Your Business
The FBI has issued a warning about a new and aggressive ransomware group known as
Interlock. Emerging in September 2024, Interlock has quickly targeted businesses and infrastructure across North America and Europe. Their primary goal is financial gain, using a method known as
double extortion.

Interlock’s strategy involves breaking into systems, stealing sensitive data, and then encrypting files so they cannot be accessed. Victims typically receive a short deadline—around four days—to pay a ransom. If the demand is not met, Interlock threatens to release the stolen data online, exposing it to public or illicit use.
The group employs sophisticated tactics to gain access. They create fake browser and security updates, design booby-trapped websites, and use other deceptive methods to trick employees into clicking on malicious links. Once inside, Interlock deploys tools that can monitor activity, steal passwords, move laterally across networks, and lock down critical files. Both Windows and Linux systems are vulnerable, putting nearly every business at risk.
Small and medium-sized businesses (SMBs) are particularly targeted because attackers recognize that these companies often have smaller security budgets and weaker defenses. A successful ransomware attack can result in lost access to client files, financial information, and day-to-day operational systems. Even if systems are restored, the reputational impact can be significant and long-lasting.
The FBI provides several recommendations to reduce the risk of attack:
- Keep software and systems updated: Patching known vulnerabilities prevents attackers from exploiting outdated systems.
- Enable multi-factor authentication (MFA): MFA adds a critical layer of security beyond a simple password.
- Use firewalls and web filtering: These tools block access to known malicious sites and suspicious traffic.
- Segment networks: Isolating parts of a network prevents malware from spreading throughout the entire system.
- Invest in proactive security tools: Detection and response solutions identify unusual behavior before it escalates into a full-blown attack.
Taking these steps now is far less costly than dealing with the aftermath of a ransomware incident. Interlock is persistent, and businesses that delay implementing strong security measures increase their risk of becoming a target.
For companies concerned about their cybersecurity posture, consulting with experts is highly recommended. Proactive monitoring, system updates, and network protections can safeguard sensitive information, maintain operational continuity, and protect a business’s reputation.
Protecting your business from ransomware is an ongoing effort. Get in touch today to ensure your systems are secure and resilient against emerging threats like Interlock.











