She found a cached VMware knowledge base article from 2017 that listed the official checksums for ESXi 6.5 GA. She compared them.
"I'm not asking for a license. I just need the vanilla ISO. Our production payment system is down." vmware esxi iso download 6.5
There it was. The graveyard.
A long pause. "I have a cold storage drive from 2018. Let me check." She found a cached VMware knowledge base article
"Leo, I need the ESXi 6.5 ISO. The portal is locked." ephemeral transfer service. Aria downloaded it
Marcus uploaded the ISO to a secure, ephemeral transfer service. Aria downloaded it, verified the hash again, and burned it to a USB drive using dd on her Linux laptop.