Rawling is a computer virus that attacks a person's Cortical Stack as well as AI's. It corrupts the information stored of both, making them useless. If a person hasn't backed up their Stack, they are lost. Rawling can even infect offsite backups of a Stack if a Stack is infected during backup. If a Stack is infected while in a living person, it drives the person insane. It also drives AI's insane before it melts their cores.