BriansClub was an illicit online marketplace where stolen payment-card records were listed for sale and bought by criminal customers. Analysis of its leaked 2015–2019 data shows that listings did not necessarily sell: researchers found very different purchase rates for magnetic-stripe records and card-not-present records. Those historical findings explain the market’s cycle, but they do not establish BriansClub’s current status or describe today’s activity.
How did BriansClub work?
In broad terms, stolen payment-card data entered an underground marketplace, sellers listed records, and criminal customers purchased some of them. Researchers at NYU Tandon analyzed transactional data extracted from BriansClub covering 2015–2019. Their August 3, 2020 summary describes the marketplace’s sellers, customers, business model, and finances, and reports more than 19 million unique card numbers listed and close to $104 million in gross revenue during that period. These are historical findings about the analyzed dataset, not present-day market figures. NYU Tandon’s summary
The key distinction is between inventory offered and records actually purchased. The study found that outcomes varied substantially by the kind of card data. A listing count alone therefore does not tell you how much of a marketplace’s stock was sold.
What did buyers purchase, and how often did it sell?
NYU Tandon’s analysis found that magnetic-stripe records made up most of BriansClub’s inventory, while card-not-present records had a higher observed purchase rate. In the study, card-not-present data meant records associated with transactions that do not require the card to be physically presented, such as online purchases. The rates below describe BriansClub’s 2015–2019 dataset as reported in 2020; they are not current or market-wide estimates.
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| Data category | Context described in the study | Historical finding |
|---|---|---|
| Magnetic-stripe records | Obtained from magnetic stripes captured during in-person transactions | Made up 97% of inventory; customers purchased 40% of this inventory |
| Card-not-present records | Associated with transactions where the card is not physically presented | 83% of this inventory was sold; researchers said it appeared to be in short supply |
The figures come from NYU Tandon researchers’ analysis of BriansClub transactional data from 2015–2019, published in the university’s August 3, 2020 summary. They show how supply and demand differed within that historical dataset; they do not establish current fraud patterns. The university summary quotes researcher Damon McCoy: “Current incentives might be insufficient to reduce risky use and acceptance of magnetic stripe transactions.” NYU Tandon’s summary
What do “CVV data” and “dump” mean?
The terms refer to distinct categories in the sources and should not be treated as synonyms. In its summary of Michigan State University research, the National Institute of Justice (NIJ) describes CVV data as a category sold in online forums. A dump, in a separate historical Department of Justice case description, refers to stolen card numbers and associated data sold onward. NYU Tandon’s BriansClub summary distinguishes magnetic-stripe and card-not-present records. These descriptions reflect the sources’ contexts; they do not establish that every seller used the terms in the same way.
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The NIJ’s July 31, 2014 summary of a study analyzing almost 2,000 threads across 13 forums reported that dumps accounted for 44.7% of products in that study’s forum sample and CVV data for 34.9%. Those figures are not estimates of BriansClub’s inventory. NIJ’s summary of the forum study
How is carding related?
The Department of Justice describes carding as criminal activity involving theft and unauthorized use of other people’s personal and financial information to obtain money, goods, or services. That definition provides general context for why stolen card records are traded; it is not evidence about BriansClub’s specific operations. The DOJ example concerns a different historical conspiracy, so its people, methods, prices, and outcomes should not be attributed to BriansClub. DOJ’s historical case description
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What can consumers do to reduce risk?
The NIJ’s consumer guidance recommends using secure online vendors, avoiding phishing emails and rogue banking applications, and checking bank and credit-card statements regularly for suspicious charges. These habits can reduce some exposure and help spot unauthorized activity, but they cannot guarantee protection from data theft or fraud. NIJ consumer guidance
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What is known about BriansClub today?
The NYU Tandon findings concern records from 2015–2019, and the university published its summary in 2020. Those sources do not establish whether BriansClub operates now, was seized, or has a successor. The historical listing and sales figures should not be read as evidence of its present status.
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