I do feel for the engineers working on whatever is going on over there btw. I worked on a "Self-DDoS" incident about a decade ago. It sucked. I wrote about it in my book "Hands-on Digital Forensics and Incident Response".
@tsupasat funnily enough ExtraHop was one of our main troubleshooting tools during this incident ;-)
Also funnily enough I posted this today because a company got bought out by someone who has no clue how to run it ;-) ;-)