this post was submitted on 14 Sep 2024
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I almost fell for an unrelated scam just a couple months ago. Basically, I was on vacation visiting family, had just gotten a new phone (w/ GrapheneOS, so it didn't have Google's network of spam detection), and was out and about at the time. Here's how it went down:
I immediately went to go reset my password and found I was locked out, so I called my bank. They confirmed that my account had been automatically locked for suspicion of fraud (good job!!) and confirmed what I suspected, the scammer had reset my password (first code) and was attempting to add an external account (second code). Had I given them that second code, they likely would have been able to submit the transfer and it would've been a giant headache to try to get that money back.
I didn't lose anything and I immediately improved the security on my account, but I felt like an idiot for letting them get that far. I had also recently consolidated my other accounts to this one, so this would've been a big blow. They changed my account numbers, I changed my username and password, and they held my account for a week or so to ensure everything was good. This bank is one of the few that actually cares about security, so I set up voice recognition (they said they track it anyway, this just turns on an extra feature) and Symantec VIP (I prefer my regular TOTP app, but they don't support that).
I don't think it'll happen to me again, but I was still surprised that I got so far through the process before recognizing that it's a scam. And I consider myself pretty security conscious (e.g. I use TOTP everywhere, password manager, keep credit bureaus frozen, etc). I guess they got my info from a breach somewhere because they knew my name, my username (to be fair, I used it everywhere), and the bank I use (could've gotten lucky). I have since changed most of my usernames to be random, so hopefully I'll be more safe going forward.
Anyway, stay on your guard, it can happen to you.
This feature is extremely insecure now that there's several AIs that can replicate voices. If a scammer calls you and you say a few words (like if you say "hello" and "sorry, I think you've got the wrong number"), a recording of that can be enough for them to replicate your voice.
This happened at my workplace. An attacker got into someone's Schwab account by calling Schwab support and successfully getting past the voice verification, and attempted to transfer $100k (from a recent stock sale) out of their account. It took a bit of effort but they managed to get all the money back.
Schwab sent out a bulk email to everyone at my company saying they're improving their security as a result, but I'm not sure if they've actually improved it. They're still promoting this insecure feature.
It honestly wasn't really that secure to begin with, since the audio would have the daylights crushed out of it through the phone system. Though AI probably makes it easier by just letting you have a computer at the end of it spit out some words.
Someone could probably get away with it by sounding vaguely enough like the person calling.
Or just do the tried and true method of going through the in-person support. Voice recognition, at least in my experience, over the phone, has trouble with accents, so someone calling to get around that isn't uncommon. It never works with me, for example, it just goes "please try again" until it redirects me to an agent.