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Carding (fraud)

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Carding (fraud)

Carding is a term for the trafficking and unauthorized use of credit cards. The stolen credit cards or credit card numbers are then used to buy prepaid gift cards to cover up the tracks. Activities also encompass exploitation of personal data, and money laundering techniques. Modern carding sites have been described as full-service commercial entities.

There are a great many of methods to acquire credit card and associated financial and personal data. The earliest known carding methods have also included "trashing" for financial data, raiding mail boxes and working with insiders.[dubiousdiscuss] Some bank card numbers can be semi-automatically generated based on known sequences via a "BIN attack". Carders might attempt a "distributed guessing attack" to discover valid numbers by submitting numbers across a high number of ecommerce sites simultaneously.

Today, various methodologies include skimmers at ATMs, hacking or web skimming an ecommerce or payment processing site or even intercepting card data within a point of sale network. Randomly calling hotel room phones asking guests to "confirm" credit card details is example of a social engineering attack vector.

Stolen data may be bundled as a "Base" or "First-hand base" if the seller participated in the theft themselves. Resellers may buy "packs" of dumps from multiple sources. Ultimately, the data may be sold on darknet markets and other carding sites and forums specialising in these types of illegal goods. Teenagers have gotten involved in fraud such as using card details to order pizzas.

On the more sophisticated of such sites, individual "dumps" may be purchased by zip code and country so as to avoid alerting banks about their misuse. Automatic checker services perform validation en masse in order to quickly check if a card has yet to be blocked. Sellers will advertise their dump's "valid rate", based on estimates or checker data. Cards with a greater than 90% valid rate command higher prices. "Cobs" or changes of billing are highly valued, where sufficient information is captured to allow redirection of the registered card's billing and shipping addresses to one under the carder's control.

Full identity information may be sold as "Fullz" inclusive of social security number, date of birth and address to perform more lucrative identity theft.

Fraudulent vendors are referred to as "rippers", vendors who take buyer's money then never deliver. This is increasingly mitigated via forum and store based feedback systems as well as through strict site invitation and referral policies.

Estimated per card prices, in US$, for stolen payment card data 2015

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