Someone else leaked a copy of a shared throwaway VM used for hacks. Akin to https://www.thc.org/segfault/, but longer lived and potentially tens of people with access.
The leaked home folder data doesn't really tie that VM to anyone, which is natural given that it seems to have mostly been used to run headless hacking tools and inspect their output.
The idea that I'm linked to this VM comes from the ridiculous idea that lazy hackers would not share SSH key files in order to control access to groups of virtual machines. I.e. if a SSH key fingerprint is at one point tied to me, that key must also still belong to me even when used from a internet connection belonging to another person in another country with a similar track record as me.
In court we had long debates about whether or not hackers could actually be so lazy as to violate best practices by sharing private key material, the lower court rejected such an idea as incredible and found me guilty.