The hackers stole more cryptocurrency in one attack than all the funds stolen by North Korean cyber criminals in 2024, when the rogue state’s cyber attackers made off with around $1.3bn in digital coins, according to cryptocurrency analysts Chainalysis.
Banks can and certainly have lost large amounts to bad actors who were prepared enough to immediately move the money around and clean it, like what was done in this case.
Doesn’t really happen these days anymore. Banks have tons of risk checks these days and will usually hold any influx or outflux or money to other accounts.
And even then, banks have rules for how to deal with transfers that shouldn’t have happened. In most cases, these transfers would be reversed (for a fee).