BAFS - Microsoft Defender Testground

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Block At First Sight

Scenario description

Block at First Sight, is a feature of Microsoft Defender Antivirus cloud-delivered protection that provides a way to detect and block new malware within seconds. You can test that it is working as expected by downloading a fake malware file.

Scenario requirements and setup

Windows 10 Anniversary update (1607) or later
Cloud protection enabled
You can download and use the Powershell script to enable this setting and others

Scenario

Test BAFS

Click the create and download new file button
You should see the browser scanning the file, followed by an antivirus block notification.

Create & download new file!

Learn more

Block at First Sight