When I used to work on the Vanguard authentication team, we blocked Vietnam from access because of too much fraud (not my choice). But it was funny because we had Vietnam based clients, so there were a couple HNW clients in the logs that you could see who would log in from Vietnam/Russia/Wherever, get blocked, open their vpn, then log in from England. This was a while back, but even then there was a push for things l…
I'd be really interested to know whether a significant amount of fraud and fraud attempts involve devices with root or non-stock operating systems. This has always struck me as a matter of checkbox compliance rather than a commonly-exploited attack vector, though I'll grant that's partially because few people actually use such devices.
A significant amount of fraud comes from scammers convincing victims to installed malicious apps. They fake being a customer service provider.
Banks don't want their customer's to lose their money and they don't have the tools to protect them from themselves. For all the privacy reasons, app stores don't even banks enough tools to identify and block this fraud.