Most criminals have a specific type of cleverness, but not intelligence.
If they were smart people, they wouldn't do the crimes in the first place.
I dealt with a low-tech breach at one of the hospitals I worked for.
The criminal worked in HIM, and used paper and pencil to note specific info about specific types of patients. Since they worked in HIM, it was expected for them to view many medical records in a day and no app detects paper/pencil, so quite clever so far.
Ultimately, they used this info to file false tax returns to steal the refunds.
The problem? They filed 881 false tax returns annnnnnd used the same address for all of them. DOH.
They were busted/arrested and off to jail they went.
Clever, right until the end, then abysmally stupid.