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128 Seconds to disruption: Microsoft Defender stops ransomware at QNET
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Fusion42 · 4 August 2026 · Fusion42 review
Microsoft Defender introduced autonomous device isolation to stop ransomware by cutting off compromised endpoints within 128 seconds, preventing credential theft, lateral movement, and payload persistence as demonstrated in a real attack at QNET.
This Wire brief sits within Fusion42's coverage of Cybersecurity and Security Infrastructure.
◆ ◆ The Wire takeaway
You lose the time pressure to manually contain attacks once Defender isolates devices autonomously. Focus on building response playbooks that integrate rapid endpoint isolation to shorten incident disruption.
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1 source · 4 Aug 2026
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