The peaks were 3.8M and 11.1M requests per second, respectively.
146.152.233.45: ASN 4983 - INTEL-SC-AS 146.152.233.53: ASN 4983 - INTEL-SC-AS
I would say that it is crucial to consider the possibility that their network might have been compromised, or that an employee might be involved in unauthorized activities.
Screenshot from Cloudflare WAF is here: https://imgur.com/a/ddos-by-ip-from-intel-A1ISx7C
Has anyone else experienced this? Any advice or insights would be greatly appreciated!