A question for you pros about cyber attacks on US banks

First, I'm not a pro, I am here to ask a question of you smart people related to cyber attacks. Maybe someone can shed some light on this for me.

Let's say a US bank was hacked in a cyber attack by another country (OK let's say Russia) and part of the breach was the hacking of databases where customers' private information like social security numbers were accessed.

Let's say you had had an account in that bank but you …

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