2b

Interesting points, thank you. Both seem quite possible.

Yeah, except that I obscure the service names in these email addresses, so they definitely aren't dictionary words.

Thank you for your suggestions. The MTA is not configured as an open relay. Rspamd is handling the spam. I'm only using public-key authentication for SSH.

Wow, there is no mentioning in title it's written in Rust. How refreshing!

Dunno why do you need all this tools when 7z/cpio is just enough:

  7z e Samsung_SSD_970_EVO_Plus_4B2QEXM7.iso initrd

  7z e -so initrd | cpio -idv "\*fumagician\*"

  sudo ./root/fumagician/fumagician