They did not actually attack a hospital. They attacked a university which happens to have an attached hospital, and ended up on some servers used by the hospita

They did not actually attack a hospital. They attacked a university which happens to have an attached hospital, and ended up on some servers used by the hospital. The ransom notice was targeted at the university. When the cops contacted them to tell them they had attacked a hospital, the ransomware people gave them the keys. The hospital has access to their data again. Looks like even criminals have a conscience. Or maybe they figured if someone dies they might be an actual effort by the police to hunt them down and put them in jail for a decade or two so they better cooperate.