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Security News, Exploits, and Vulnerabilities.

Equifax Hackers Stole 200k Credit Card Accounts in One Fell Swoop

Visa and MasterCard are sending confidential alerts to financial institutions across the United States this week, warning them about more than 200,000 credit cards that were stolen in the epic data breach announced last week at big-three credit bureau Equifax. At first glance, the private notices obtained by KrebsOnSecurity appear to suggest that hackers were first able to steal credit card numbers from Equifax starting in November 2016. But Equifax says the accounts were all stolen at the same time — when hackers accessed the company’s systems in mid-May 2017.

Payments Giant Verifone Investigating Breach

Credit and debit card payments giant Verifone [NYSE: PAY] is investigating a breach of its corporate computer networks that could impact companies running its point-of-sale solutions, according to multiple sources. Verifone says the extent of the breach was “limited” and that its payment services network was not impacted.

San Jose, Calif.-based Verifone is the largest maker of credit card terminals used in the United States. It sells point-of-sale terminals and services to support the swiping and processing of credit and debit card payments at a variety of businesses, including retailers, taxis, and fuel stations.

On Jan. 23, 2017, Verifone sent an “urgent” email to all company staff and contractors, telling them that they had 24 hours to change all company passwords.

Fast Food Chain Arby’s Acknowledges Breach

Sources at nearly a half-dozen banks and credit unions independently reached out over the past 48 hours to inquire if I’d heard anything about a data breach at Arby’s fast-food restaurants. Asked about the rumors, Arby’s told KrebsOnSecurity that it recently remediated a breach involving malicious software installed on payment card systems at hundreds of its restaurant locations nationwide.

Giant Food Sees Giant Card Fraud Spike

Citing a recent and large increase in credit card fraud, Washington, DC-area grocer Giant Food says it will no longer allow customers to use credit cards when purchasing gift cards and reloadable or prepaid debit cards.

The Great EMV Fake-Out: No Chip For You!

Many banks are now issuing customers more secure chip-based credit cards, and most retailers now have card terminals in their checkout lanes that can handle the “dip” of chip-card transactions (as opposed to the usual swipe of the card’s magnetic stripe). But comparatively few retailers actually allow chip transactions: Most are still asking customers to swipe the stripe instead of dip the chip. This post will examine what’s going on here, why so many merchants are holding out on the dip, and where this all leaves consumers.

JPMorgan Hackers Breached Anti-Fraud Vendor G2 Web Services

Buried in the federal indictments unsealed this week against four men accused of stealing tens of millions of consumer records from JPMorgan Chase and other brokerage firms are a series of other unnamed companies that were similarly victimized by the accused. One of them, identified in the indictments only as “Victim #12,” is an entity that helps banks block transactions for dodgy goods advertised in spam. Turns out, the hackers targeted this company so that they could better push through payments for spam-advertised prescription drugs and fake antivirus schemes.

According to multiple sources, Victim #12 is none other than Bellevue, Wash. based G2 Web Services LLC, a company that helps banks figure out if a website is fraudulent or is selling contraband. G2 Web Services did not respond to multiple requests for comment.

‘Revolution’ Crimeware & EMV Replay Attacks

In October 2014, KrebsOnSecurity examined a novel “replay” attack that sought to exploit implementation weaknesses at U.S. financial institutions that were in the process of transitioning to more secure chip-based credit and debit cards. Today’s post looks at one service offered in the cybercrime underground to help thieves perpetrate this type of fraud.

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