Feeds

eBay says database leak dump offers are fake

Crooks being unscrupulous - who'd have thought it?

Protecting users from Firesheep and other Sidejacking attacks with SSL

Cybercrooks are offering to sell "stolen copies" of the leaked eBay database through an advert posted through Pastebin.

However eBay says the sale is fake. "We have checked all published data and so far none are authentic eBay accounts," eBay's press office told El Reg.

Security experts, although far from certain, seem inclined to agree.

The dodgy seller is offering to sell the "full eBay database dump" with 145 million records on a non-exclusive basis for 1.453 BTC (or $750).

A sample lump purporting to contain the compromised details of more than 12,000 users from the APAC region has been uploaded through Mega. The validity of the data on sale is unverified.

The Mega sample contains name, email address and postal addresses. Passwords are hashed and not revealed.

Security expert Kenn ‪White reported finding several of the leaked email ‬addresses in existing dumps. Other security experts are also wary.

"It’s not yet been verified that these are legitimately eBay credentials, and it’s possible that a criminal has just spotted an opportunity to cash in on the attack with some other credentials dump they have," said Trey Ford, global security strategist at Rapid7.

"That said, during initial analysis of 12,663 of the records which have been provided as a free sample, we were able to find some matches between email prefixes and eBay profile name where people are using the same handle."

“This doesn't necessarily mean these credentials are from the eBay attack – it could be that people use the same handle across multiple sites including one that was previously compromised, and the creds are actually from that. In fact, we also found matches between these email addresses and a popular Malaysian web forum, which may point to the true source of these credentials. We have no way to confirm how statistically representative the leaked APAC sample is of the broader eBay dataset," he added.

If genuine the leaks were hashed using a strong algorithm and attempts to find hashes corresponding with the simplest passwords have failed to come up with anything, which is in itself suspicious.

The credentials set is using PBKDF2 (Password-Based Key Derivation Function 2) SHA-256 hashes. "This means they employ a strong hash function and also intentionally make cracking them more difficult and slow by individually salting and using a high number of hash iterations," Ford explained.

Security consultant Per Thorsheim is also skeptical. "PBKDF2 with 12K iterations takes a looooong time to crack. No hashes cracked yet, 123456 should have been found among 12K," he said in a Twitter update. "it looks like we call FAKE on the ‪@KbcdPfA‬ alleged eBay leak up for sale." ®

The next step in data security

More from The Register

next story
Israeli spies rebel over mass-snooping on innocent Palestinians
'Disciplinary treatment will be sharp and clear' vow spy-chiefs
Infosec geniuses hack a Canon PRINTER and install DOOM
Internet of Stuff securo-cockups strike yet again
THREE QUARTERS of Android mobes open to web page spy bug
Metasploit module gobbles KitKat SOP slop
'Speargun' program is fantasy, says cable operator
We just might notice if you cut our cables
Apple Pay is a tidy payday for Apple with 0.15% cut, sources say
Cupertino slurps 15 cents from every $100 purchase
YouTube, Amazon and Yahoo! caught in malvertising mess
Cisco says 'Kyle and Stan' attack is spreading through compromised ad networks
Hackers pop Brazil newspaper to root home routers
Step One: try default passwords. Step Two: Repeat Step One until success
Greater dev access to iOS 8 will put us AT RISK from HACKERS
Knocking holes in Apple's walled garden could backfire, says securo-chap
prev story

Whitepapers

Providing a secure and efficient Helpdesk
A single remote control platform for user support is be key to providing an efficient helpdesk. Retain full control over the way in which screen and keystroke data is transmitted.
Saudi Petroleum chooses Tegile storage solution
A storage solution that addresses company growth and performance for business-critical applications of caseware archive and search along with other key operational systems.
Security and trust: The backbone of doing business over the internet
Explores the current state of website security and the contributions Symantec is making to help organizations protect critical data and build trust with customers.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.