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4 Years After Target, the Little Guy is the Target
28 December, 2017
This post was originally published on this site

Dec. 18 marked the fourth anniversary of this site breaking the news about a breach at Target involving some 40 million customer credit and debit cards. It has been fascinating in the years since that epic intrusion to see how organized cyber thieves have shifted from targeting big box retailers to hacking a broad swath of small to mid-sized merchants.

In many ways, not much has changed: The biggest underground shops that sell stolen cards still index most of their cards by ZIP code. Only, the ZIP code corresponds not to the legitimate cardholder’s billing address but to the address of the hacked store at which the card in question was physically swiped (the reason for this is that buyers of these cards tend to prefer cards used by people who live in their geographic area, as the subsequent fraudulent use of those cards tends to set off fewer alarm bells at the issuing bank).

Last week I was researching a story published here this week on how a steep increase in transaction fees associated with Bitcoin is causing many carding shops to recommend alternate virtual currencies like Litecoin. And I noticed that popular carding store Joker’s Stash had just posted a new batch of cards dubbed “Dynamittte,” which boasted some 7 million cards advertised as “100 percent” valid — meaning the cards were so fresh that even the major credit card issuers probably didn’t yet know which retail or restaurant breach caused this particular breach.

An advertisement for a large new batch of stolen credit card accounts for sale at the Joker’s Stash Dark Web market.

Translation: These stolen cards were far more likely to still be active and useable after fraudsters encode the account numbers onto fake plastic and use the counterfeits to go shopping in big

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