What is a Card Testing Attack?
A card testing attack is a method used by cybercriminals to verify stolen credit card information, including card numbers and CVV codes, by making small purchases. These attacks can lead to unauthorized transactions and identity theft, posing a significant risk for both individuals and businesses involved in online transactions.
How Does a Card Testing Attack Work?
- Stolen card details are used to make small purchases, typically below the authorization threshold that requires further verification.
- The purchases are often made at online stores that offer fast shipping and easy returns to minimize the time between the transaction and the fraud alert.
- Criminals use the response from the bank (approval or denial) to confirm the validity of the stolen card details.
Implications and Risks
- Financial Loss: cardholders and businesses can suffer significant financial losses due to unauthorized transactions.
- Identity Theft: criminals can use the cardholder's personal and financial information to commit further fraud.
- Brand Damage: the reputation of online merchants can be tarnished if they are found to be complicit in card testing attacks.