by Pieter Arntz at Malwarebytes Labs
The Polish Computer Emergency Response Team (CERT Polska) analyzed a new Android-based malware that uses NFC technology to perform unauthorized ATM cash withdrawals and drain victims’ bank accounts.
Researchers found that the malware, called NGate, lets attackers withdraw cash from ATMs (Automated Teller Machines, or cash machines) using banking data exfiltrated from victims’ phones—without ever physically stealing the cards.
NFC is a wireless technology that allows devices such as smartphones, payment cards, and terminals to communicate when they’re very close together. So, instead of stealing your bank card, the attackers capture NFC (Near Field Communication) activity on a mobile phone infected with the NGate malware and forward that transaction data to devices at ATMs. In NGate’s case the stolen data is sent over the network to the attackers’ servers rather than being relayed purely by radio.
NFC comes in a few “flavors.” Some produce a static code—for example, the card that opens my apartment building door. That kind of signal can easily be copied to a device like my “Flipper Zero” so I can use that to open the door. But sophisticated contactless payment cards (like your Visa or Mastercard debit and credit cards) use dynamic codes. Each time you use the NFC, your card’s chip generates a unique, one-time code (often called a cryptogram or token) that cannot be reused and is different every time.
So, that’s what makes the NGate malware more sophisticated. It doesn’t simply grab a signal…
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