Posts Tagged: eBay breach

May 14

Expert: Fake eBay Customer List is Bitcoin Bait

In the wake of eBay’s disclosure that a breach may have exposed the personal data on tens of millions of users, several readers have written in to point out an advertisement that is offering to sell the full leaked user database for 1.4 bitcoins (roughly USD $772 at today’s exchange rates). The ad has even prompted some media outlets to pile on that the stolen eBay data is now for sale. But a cursory examination of the information suggests that it is almost certainly little more than a bid to separate the unwary from their funds.

The advertisement, posted on Pastebin here, promises a “full ebay user database dump with 145, 312, 663 unique records”, for sale to anyone who sends 1.453 bitcoins to a specific bitcoin wallet. The ad includes a link to a supposed “sample dump” of some 12,663 users from the Asia-Pacific region.

ebay-btcThere is a surprisingly simple method for determining the validity of these types of offers. Most Web-based businesses allow one user or customer account per email address, and eBay is no exception here. I took a random sampling of five email addresses from the 12,663 users in that file, and tried registering new accounts with them. The outcome? Success on all five.

For a sanity check on my results, I reached out to Allison Nixon, a threat researcher with Deloitte & Touche LLP (and one of the best sources I’ve met for vetting and debunking these supposed “leaks”). Nixon did the same, and came away with identical results.

“A lot of this is inference — finding out whether an account exists,” Nixon said. “A lot of the time if they generate fake leaks, they’re not doing it based on data from real accounts, because if they did then they might as well hack the real web site.” Continue reading →

May 14

eBay Urges Password Changes After Breach

eBay is asking users to pick new passwords following a data breach earlier this year that exposed the personal information of an untold number of the auction giant’s 145 million customers.

eBayIn a blog post published this morning, eBay said it had “no evidence of the compromise resulting in unauthorized activity for eBay users, and no evidence of any unauthorized access to financial or credit card information, which is stored separately in encrypted formats. However, changing passwords is a best practice and will help enhance security for eBay users.”

Assisted by federal investigators, eBay determined that the intrusion happened in late February and early march, after a “small number of employee log-in credentials” that allowed attackers access to eBay’s corporate network were compromised. The company said the information compromised included eBay customers’ name, encrypted password, email address, physical address, phone number and date of birth. eBay also said it has no evidence of unauthorized access or compromises to personal or financial information for PayPal users.

The company said it will begin pushing out emails today asking customers to change their passwords. eBay has not said what type of encryption it used to protect customer passwords, but it previous breaches are any indication, the attackers are probably hard at work trying to crack them. Continue reading →