Amazon is the largest cloud provider in the world, and so I doubt Amazon would ever admit a cyber intrusion caused any serious cloud outage. So February 28, 2017 following a serious cloud outage Amazon blamed on a typing error by a “Amazon Simple Storage Service (S3) team was debugging an issue causing the S3 billing system to progress more slowly than expected.”
I for one an not persuaded that 3+ hour outage wasn’t caused by a cyber intrusion.
Be my guest and read the Amazon Summary Report entitled “Summary of the Amazon S3 Service Disruption in the Northern Virginia (US-EAST-1) Region”and see if you believe Amazon.