In the wake of the devastating NotPetya attack, Microsoft set out to understand why some customers werent applying cybersecurity hygiene, such as security patches, which would have helped mitigate this threat. We were particularly concerned with why patches hadnt been applied, as they had been available for months and had already been used in the WannaCrypt worm—which clearly established a ”real and present danger. We learned a lot from this journey, including how important it is to build...

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