Wait I have been wondering about this. How do banks make sure that a cyberattack couldn't change the numbers in people's bank accounts? How do you know that they're safeguards are sufficient?
1. We can never know if we have enough safe guards
2. Banking systems are already "insecure" by some definition of this.
3. Because of this insecurity a lot of government regulations were passed on logging transactions, being able to roll them back, etc.
We've seen these trigger I'm financial markets: https://www.investor.gov/introduction-investing/investing-ba...
If you've made large purchases before or strange purchases before you have likely hit similar consumer side things.
The network banks talk on is called swift. The way it works is, as I understand it, if you say move money from account 1 to account 2 it just happens so if I knew your account number I could drain all funds. Because of this, there are systems that block certain transactions. Could ai hack around them? Maybe, but they are undocumented, battled hardened over decades, and even if they did the bank could roll back the transactions.