On a much smaller scale, I witnessed something similar happen to one of my coworkers.
One morning she called me in a panic. Her inbox was being innundated by spam. I'd never seen anything like it. Literally one message per second or more at times. And they were coming from all over like a DDOS. A hacker had used a malicious service to subscribe her to every conceivable mailing list on the planet, so she started getting tons of messages. We didnt give it much thought, because we were in the middle of investigating a string of vulgar, sexually inappropriate emails that appeared to be coming in to her and another lady with insider info that only a coworker would know. In the moment, we chalked it up to that suspected pervert ex-employee taking the harassment to the next level.
Later that day, I heard back from her again. It turns out somebody had hacked her account and had harvested enough info about her bank to do a password reset and transfer almost all of the money out of her bank. The emails were a smoke screen so that she hopefully wouldnt notice the password reset email come through. And it worked. The reset message scrolled right by and she never saw it due to the confusion. She found it after talking to her bank after finding out she suddenly had no money in her checking account to buy lunch.
I'm not sure if she ever got her money back. But I found out she lost her new dream home. They were in the middle of closing when it happened. When the finance company saw the attack during the final credit check, they immediately halted the sale because as far as they could see, she had just emptied her bank accounts, making her a risk.
People suck.