Last Friday, Marriott sent out millions of emails warning of a massive data breach — some 500 million guest reservations had been stolen from its Starwood database.

One problem: the email sender’s domain didn’t look like it came from Marriott at all.

Marriott sent its notification email from “email-marriott.com,” which is registered to a third party firm, CSC, on behalf of the hotel chain giant. But there was little else to suggest the email was at all legitimate — the domain doesn’t load or have an identifying HTTPS certificate. In fact, there’s no easy way to check that the domain is real, except a buried note on Marriott’s data breach notification site that confirms the domain as legitimate.

But what makes matters worse is that the email is easily spoofable.

[…]

Take “email-marriot.com.” To the untrained eye, it looks like the legitimate domain — but many wouldn’t notice the misspelling. Actually, it belongs to Jake Williams, founder of Rendition Infosec, to warn users not to trust the domain.

“I registered the domains to make sure that scammers didn’t register the domains themselves,” Williams told TechCrunch. “After the Equifax breach, it was obvious this would be an issue, so registering the domains was just a responsible move to keep them out of the hands of criminals.”

[…]

Williams isn’t the only one who’s resorted to defending Marriott customers from cybercriminals. Nick Carr, who works at security giant FireEye, registered the similarly named “email-mariott.com” on the day of the Marriott breach.

“Please watch where you click,” he wrote on the site. “Hopefully this is one less site used to confuse victims.” Had Marriott just sent the email from its own domain, it wouldn’t be an issue.

Source: Marriott’s breach response is so bad, security experts are filling in the gaps — at their own expense | TechCrunch