Microsoft Detects Massive Dofoil Attack

Mid-day Tuesday (PST), Microsoft’s Windows Defender blocked more than 80,000 instances of several new variants of the Dofoil (aka Smoke Loader) downloader. The signatureless machine learning capabilities of Defender detected anomalous behavior, and within minutes had protected Windows 10, 8.1 and 7 users from the outbreak. 

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Story added 8. March 2018, content source with full text you can find at link above.