Microsoft Defender Stops QNET Ransomware Attack in 128 Seconds With Automatic Device Isolation

Ransomware can turn one careless click into a business-wide emergency. An incident at QNET shows how quickly that risk can grow when attackers use trusted Windows tools to launch a second stage of an intrusion. The attack began after a user opened a malicious file, likely delivered through email or a browser download. It launched mshta.exe, a legitimate Windows utility, which contacted attacker-controlled infrastructure to collect a remote payload and prepare persistent activity. Microsoft analysts noted that the operation used a living-off-the-land method, meaning it relied on a built-in tool rather than an obvious malware program. That approach can blend into normal system activity and give attackers time to steal...

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