Recent indictments reveal debit card fraud techniques

On May 9, 2013, Federal prosecutors issued indictments against eight individuals for hacking and theft.  The case revealed the methods used by hackers to gain access to debit card numbers that were ultimately used to withdraw $45 million.

Hackers gained unauthorized access to credit card processing companies and conducted what hackers term “unlimited operation”.  Unlimited operation is an attack where debit cards account balances and withdrawal limits are removed.  In this case, attackers performed unlimited operation on several prepaid MasterCard debit cards and then distributed the card numbers and pins to groups around the world.  These groups recoded gift cards and hotel entry cards with the stolen card numbers and then coordinated withdrawals from ATMs.

We have spoken of the increase in the coordination of cyber-attacks many times, and this is an excellent example.  In a little over two hours on December 22, 2012, the criminals were able to withdraw $400,000 from 140 ATMs across New York City.  A series of thefts in February resulted in the theft of almost $2.4 million in 10 hours, and the group is accused of stealing a total of $45 million by following this procedure for different card issuers and locations.

The banks involved in this case might have prevented the theft by monitoring for anomalous behavior such as the excessive use of a card number or the modifications required in unlimited operation attacks.  Anomalous behavior monitoring is valuable no matter where the next attack comes from, and it is useful in other industries as well.



About The Author


Eric Vanderburg

Eric Vanderburg is an author, thought leader, and consultant. He serves as the Vice President of Cybersecurity at TCDI and Vice Chairman of the board at TechMin. He is best known for his insight on cybersecurity, privacy, data protection, and storage. Eric is a continual learner who has earned over 40 technology and security certifications. He has a strong desire to share technology insights with the community. Eric is the author of several books and he frequently writes articles for magazines, journals, and other publications.

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