Many security-conscious people probably think they’d never fall for a phone-based phishing scam. But if your response to such a scam involves anything other than hanging up and calling back the entity that claims to be calling, you may be in for a rude awakening. Here’s how one security and tech-savvy reader got taken for more than $10,000 in an elaborate, weeks-long ruse.
Today’s lesson in how not to get scammed comes from “Mitch,” the pseudonym I picked for a reader in California who shared his harrowing tale on condition of anonymity. Mitch is a veteran of the tech industry — having worked in security for several years at a fairly major cloud-based service — so he’s understandably embarrassed that he got taken in by this confidence scheme.
On Friday, April 17, Mitch received a call from what he thought was his financial institution, warning him that fraud had been detected on his account. Mitch said the caller ID for that incoming call displayed the same phone number that was printed on the back of his debit card.
But Mitch knew enough of scams to understand that fraudsters can and often do spoof phone numbers. So while still on the phone with the caller, he quickly logged into his account and saw that there were indeed multiple unauthorized transactions going back several weeks. Most were relatively small charges — under $100 apiece — but there were also two very recent $800 ATM withdrawals from cash machines in Florida.
If the caller had been a fraudster, he reasoned at the time, they would have asked for personal information. But the nice lady on the phone didn’t ask Mitch for any personal details. Instead, she calmly assured him the bank would reverse the fraudulent charges and said they’d be sending him a new debit card via express mail. After making sure the representative knew which transactions were not his, Mitch thanked the woman for notifying him, and hung up.
The following day, Mitch received another call about suspected fraud on his bank account. Something about that conversation didn’t seem right, and so Mitch decided to use another phone to place a call to his bank’s customer service department — while keeping the first caller on hold.
“When the representative finally answered my call, I asked them to confirm that I was on the phone with them on the other line in the call they initiated toward me, and so the rep somehow checked and saw that there was another active call with Mitch,” he said. “But as it turned out, that other call was the attackers also talking to my bank pretending to be me.”
Mitch said his financial institution has in the past verified his identity over the phone by sending him a one-time code to the cell phone number on file for his account, and then asking him to read back that code. After he hung up with the customer service rep he’d phoned, the person on the original call said the bank would be sending him a one-time code to validate his identity.
Now confident he was speaking with a representative from his bank and not some fraudster, Mitch read back the code that appeared via text message shortly thereafter. After more assurances that any additional phony charges would be credited to his account and that he’d be receiving a new card soon, Mitch was annoyed but otherwise satisfied. He said he checked his account online several times over the weekend, but saw no further signs of unauthorized activity.
That is, until the following Monday, when Mitch once again logged in and saw that a $9,800 outgoing wire transfer had been posted to his account. At that point, it dawned on Mitch that both the Friday and Saturday calls he received had likely been from scammers — not from his bank.
Another call to his financial institution and some escalation to its fraud department confirmed that suspicion: The investigator said another man had called in on Saturday posing as Mitch, had provided a one-time code the bank texted to the phone number on file for Mitch’s account — the same code the real Mitch had been tricked into giving up — and then initiated an outgoing wire transfer.
It appears the initial call on Friday was to make him think his bank was aware of and responding to active fraud against his account, when in actuality the bank was not at that time. Also, the Friday call helped to set up the bigger heist the following day.
Mitch said he and his bank now believe that at some point his debit card and PIN were stolen, most likely by a skimming device planted at a compromised point-of-sale terminal, gas pump or ATM he’d used in the past few weeks. Armed with a counterfeit copy of his debit card and PIN, the fraudsters could pull money out of his account at ATMs and go shopping in big box stores for various items. But to move lots of money out of his account all at once, they needed Mitch’s help.
To make matters worse, the fraud investigator said the $9,800 wire transfer had been sent to an account at an online-only bank that also was in Mitch’s name. Mitch said he didn’t open that account, but that this may have helped the fraudsters sidestep any fraud flags for the unauthorized wire transfer, since from the bank’s perspective Mitch was merely wiring money to another one of his accounts. Now, he’s facing the arduous task of getting identity theft (new account fraud) cleaned up at the online-only bank.
Mitch said that in retrospect, there were several oddities that should have been additional red flags. For one thing, on his outbound call to the bank on Saturday while he had the fraudsters on hold, the customer service rep asked if he was visiting family in Florida.
Mitch replied that no, he didn’t have any family members living there. But when he spoke with the bank’s fraud department the following Monday, the investigator said the fraudsters posing as Mitch had succeeded in adding a phony “travel notice” to his account — essentially notifying the bank that he was traveling to Florida and that it should disregard any geographic-based fraud alerts created by card-present transactions in that region. That would explain why his bank didn’t see anything strange about their California customer suddenly using his card in Florida.
Also, when the fake customer support rep called him, she stumbled a bit when Mitch turned the tables on her. As part of her phony customer verification script, she asked Mitch to state his physical address.
“I told her, ‘You tell me,’ and she read me the address of the house I grew up in,” Mitch recalled. “So she was going through some public records she’d found, apparently, because they knew my previous employers and addresses. And she said, ‘Sir, I’m in a call center and there’s cameras over my head. I’m just doing my job.’ I just figured she was just new or shitty at her job, but who knows maybe she was telling the truth. Anyway, the whole time my girlfriend is sitting next to me listening to this conversation and she’s like, ‘This sounds like bullshit.’”
Mitch’s bank managed to reverse the unauthorized wire transfer before it could complete, and they’ve since put all the stolen funds back into his account and issued a new card. But he said he still feels like a chump for not observing the golden rule: If someone calls saying they’re from your bank, just hang up and call them back — ideally using a phone number that came from the bank’s Web site or from the back of your payment card. As it happened, Mitch only followed half of that advice.
What else could have made it more difficult for fraudsters to get one over on Mitch? He could have enabled mobile alerts to receive text messages anytime a new transaction posts to his account. Barring that, he could have kept a closer eye on his bank account balance.
If Mitch had previously placed a security freeze on his credit file with the three major consumer credit bureaus, the fraudsters likely would not have been able to open a new online checking account in his name with which to receive the $9,800 wire transfer (although they might have still been able to wire the money to another account they controlled).
As Mitch’s experience shows, many security-conscious people tend to focus on protecting their online selves, while perhaps discounting the threat from less technically sophisticated phone-based scams. In this case, Mitch and his bank determined that his assailants never once tried to log in to his account online.
“What’s interesting here is the entirety of the fraud was completed over the phone, and at no time did the scammers compromise my account online,” Mitch said. “I absolutely should have hung up and initiated the call myself. And as a security professional, that’s part of the shame that I will bear for a long time.”
This entry was posted on Thursday, April 23rd, 2020 at 1:27 pm and is filed under A Little Sunshine, Latest Warnings, The Coming Storm. You can follow any comments to this entry through the RSS 2.0 feed. You can skip to the end and leave a comment. Pinging is currently not allowed.
- DennisApril 23, 2020 at 1:50 pmYes, absolutely. Hang up. What I also do is this. I reply, “Thank you for the warning. I will come over to talk to you in person.” I then drive to the bank and resolve it that way. (Provided the bank is not an online one, that are prevalent these days.)Unfortunately though, in this BS virus lockdown, it makes it much more easy for scammers to use phones for their game. And for instance, I won’t be able to go to my bank now because their lobby is closed. Sigh.REPLY
- Jon MarcusApril 23, 2020 at 2:28 pm“…Drive to the bank and resolve it that way…” only works for a very small set of bank customers who use a small bank within easy driving distance. Obviously it doesn’t work for online-only banking, nor do I think it’d work if you tried strolling into a little branch of BoA/Chase/megabank of your choice.As someone who just got done fighting with a small local bank to make them reverse thousands of dollars in unauthorized ACH payouts, I can tell you they’re no panacea!REPLY
- GreybeardApril 23, 2020 at 2:25 pmIt’s even worse than this. My sister almost fell for one of these complex scams. She knew enough to hang up and call back–but she was on a landline: as we later reconstructed, when she called back *the scammers had never hung up*. Remember that if I call you on a landline, you can hang up, but until I hang up, the line usually stays open.My sister couldn’t remember whether she’d heard a dialtone before calling back (with cellphones so common, we’re less used to checking for that), but they could have faked that, too. Fortunately something alerted her, perhaps the fact that the scammers claimed to be able to see both her Visa and her MasterCard, which are from different issuers.The lesson: if you get such a call on a landline, call back *on a different line*, or else place another call in between to be sure the line is cleared.I’ve since seen this scam described elsewhere; as my sister is very non-technical and wasn’t 100% sure of some of the details, it took me a few days to figure out how it might have worked enough to even search for it. Pretty clever. And nasty.