Hacking is one route by which payment-card information can be compromised, but it is not the whole story. Stolen card data may be bundled with credentials or personal information, traded through criminal online channels, and later used in fraud. The routes and actors vary, and official case figures describe specific investigations—not the size of the overall market.
What “hacking” means in payment-card theft
In this context, hacking refers broadly to unauthorized access to devices, systems, or accounts that can expose payment information. It is important not to treat every card compromise as a breach of a bank or retailer: payment-card crimes can involve cards, payment systems, point-of-sale terminals, or ATMs. INTERPOL’s overview describes this wider range of settings: Payment card fraud.
Card information can also be compromised alongside account credentials or other personal information. That distinction matters because a later fraud may involve more than a card number, and the compromise may have occurred far from the place where the victim notices unauthorized activity.
How stolen information moves into criminal markets
Europol’s IOCTA 2025 report describes stolen data as a commodity that can be sold, resold, and repackaged through forums, encrypted channels, and criminal marketplaces. This helps explain why a compromise and a fraudulent transaction may be separated by time, intermediaries, and national borders.
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Marketplaces do not necessarily deal in card information alone. In its January 30, 2025 announcement about the Cracked and Nulled marketplaces, the U.S. Department of Justice (DOJ) described posts advertising cybercrime tools and stolen information. Its December 12, 2024 announcement about Rydox described offerings that included personal information, stolen credentials, card information, and cybercrime tools. These cases illustrate mixed inventories; they do not establish what every marketplace sells.
What official cases show—and what they do not
DOJ case announcements provide concrete examples of the scale alleged or documented in particular investigations. They should not be added together or presented as a market-wide estimate.
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| Case or marketplace | What DOJ reported | How to interpret the figure |
|---|---|---|
| Cracked and Nulled, announced January 30, 2025 | Over 4 million users, over 28 million posts, approximately $4 million in revenue, and at least 17 million U.S. victims affected, according to DOJ. | DOJ described posts advertising cybercrime tools and stolen information. The post count is not a count of card listings, and these are figures for the named marketplaces—not the whole illicit market. DOJ announcement |
| Skynet Market case, announced May 16, 2023; updated February 6, 2025 | DOJ said the defendant personally possessed, sent, and received 49,084 stolen payment cards, and that sales had generated at least $1 million in cryptocurrency proceeds at the time described. | This is DOJ’s account of one defendant and one case, not a typical vendor’s volume or a market total. DOJ announcement |
| Rydox, announced December 12, 2024; updated February 6, 2025 | DOJ said the marketplace offered 321,372 cybercrime products to over 18,000 users. | The offerings included several kinds of information and tools; 321,372 is not a count of credit cards. The release described charges and allegations against administrators. DOJ announcement |
In the Rydox announcement, DOJ attributed this statement to Principal Deputy Assistant Attorney General Nicole M. Argentieri: “The indictment alleges that, for more than eight years, the defendants administered an illicit online marketplace that sold PII, credit card information, and login credentials that had been stolen from thousands of U.S. victims.” The wording is significant: it describes allegations in that indictment, not a finding about every marketplace.
These sources do not establish a reliable global total for stolen-card sales. Nor do they rank the different routes by frequency. The figures above answer questions about named cases, not how many cards are traded worldwide.
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Why investigations cross borders and marketplaces change
A victim, the compromised system, a marketplace, and the people involved in later fraud may be in different countries. INTERPOL notes that victims can live in a different country from where subsequent theft, fraud, or cash-out occurs. That separation can complicate investigations and make a suspicious transaction difficult to trace from the victim’s perspective.
Market disruption can change where illicit activity takes place without proving that the wider threat has ended. Europol’s IOCTA 2024 reported that repeated takedowns shortened the lifecycles of dark-web forums and marketplaces and contributed to fragmentation and multiplication of cyber threats. That is the report’s assessment of developments it describes, not a guarantee that every takedown has the same effect.
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- Latches safely and securely when not in use. Rounded corner wouldn't damage on your clothes. With 7 accordion Slots, Capacity for up to more than 10 credit cards or more than 20 business cards.
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What to do if you think your card information was stolen
Act on the account with the card issuer first; the right next steps can depend on where you live and the issuer’s procedures.
- Contact your card issuer promptly. Use the phone number on the card or the issuer’s official app or website. Ask about freezing or replacing the card and disputing transactions you do not recognize.
- Review recent activity. Check transactions and statements for unfamiliar charges, including small amounts, and continue monitoring for new activity.
- Secure related accounts. If you reused a password or suspect an online account was also exposed, change that password and any reused passwords, and enable multifactor authentication where available.
- Report the incident through official channels in your country. Follow your government’s or law-enforcement agency’s guidance. DOJ’s Skynet release specifically directed people who believed their financial information might have been stolen during the period identified in that case to report through the FBI’s Internet Crime Complaint Center and reference that release; this case-specific direction is not a universal reporting route.
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What the term “carding” does—and does not—mean
“Carding” is a broad criminal term used in connection with payment information and unauthorized transactions; it is not a synonym for one hacking technique. In the Skynet case, DOJ described allegations involving obtaining personal and payment information and using it for unauthorized charges. That account concerns the specific charges in that case and should not be generalized to every use of the term.
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