I have come across a ransomware attack. Naturally their IT provider didn't have a fully thought through backup system in place and now they is in all sorts of trouble. I've gone through the system and tried every trick I know to recover the critical files they need but there is just no way to get the files back either off the computer or the backups because the backups are all encrypted as well.
So this brings me here. I've ID'ed the ransomware as GlobeImposter 2.0 but the difficulty is that the decrypter you have does not work with this variation. The encrypted files all end in ..readme.