The Russian state-sponsored APT28 threat group is using a custom variant of the open-source Covenant post-exploitation framework for long-term espionage operations.
China-linked UAT-9244 targets South American telecom networks with TernDoor, PeerTime, and BruteEntry malware on Windows, Linux, and edge devices.
Besides their utility in self-hosted projects, Proxmox LXCs are just as viable for general server experiments ...