Microsoft Stops Ransomware in 128 Seconds with Device Isolation

Ransomware attacks are on the rise, with reported incidents increasing year-over-year. Threat actors are increasingly using AI to automate and scale their attacks, making them more effective. One way to combat this is through device isolation, which can stop ransomware attacks in just 128 seconds. Microsoft has developed a response action within Defender that extends autonomous protection directly to compromised endpoints.

According to a case study detailed by Microsoft, a QNET attack was halted in under two minutes from start to finish using device isolation. The attackers employed a living-off-the-land technique to fetch the malicious remote ransomware payload. Device isolation breaks the lateral movement opportunity and gives security teams time to breathe.

Microsoft's report emphasizes that device isolation is not a magic bullet, but rather a tool that should be used in conjunction with foundational controls such as privileged account management and multi-factor authentication. Knowing one's total attack surface and testing the environment for efficient remediation are key.