EFi /rootkit malware infection

I have 4 macs, m1-m3 that have all been hijacked to either EFi malware or serious rootkit type malware. The system is booting and running from a ram based virtual disk (ramfile://2454906912) that recreates its self after DFU restore recovery reinstalls and is blocking my ability to reinstall from USB. The virtualized disk images refuse to eject or unmount and are being locked by the kernel (process 0) I’m at my wits end, what are my options at this point short of round filing all my computers?