Why can we use sniffing equipment to "empty" bank cards from hundreds of meters away?

? The bank card was clearly on me, but the money in the card was swiped away, ranging from several thousand yuan to hundreds of thousands! Recently, the police in Yanjin, Xinxiang, Henan, uncovered a case of using a PO machine. A series of cases involving theft of victims’ bank cards. The suspects Lei and Lei Bin were responsible for using sniffing equipment to steal the victim's mobile phone information, receive verification code text messages, and analyze the Alipay account and bank card number bound to the owner's ID card. Xu was responsible for "processing" the stolen information, and Stealing money on third-party payment platforms. I had my bank card with me but my money was stolen. In January this year, the Yanjin County Public Security Bureau received a call from a member of the public saying that his bank card had been stolen and swiped for 55,000 yuan for no reason. Immediately afterwards, other people came to the Yanjin County Public Security Bureau to call the police, and the situation was similar. In a short period of time, there were as many as 12 similar theft cases in a small county, and the amount stolen ranged from a few thousand yuan to more than hundreds of thousands. This attracted great attention from the Yanjin police.

?Simply put, in mainstream APPs, account login and fund operations can be achieved by adding a mobile phone number and SMS verification code. The suspect used this sniffing device to obtain the user’s verification code. In order to control the user account, he can master your mobile phone number, ID number, bank card number, and SMS verification code. The police remind you to use cash or other payment methods when purchasing in small stores along the street; or set a credit limit for your credit card. Any consumption exceeding the limit must be confirmed by entering a mobile phone verification code.

In addition, these POS machines are all applied for through forged documents. Therefore, the merchant information displayed on the card swipe record is definitely inconsistent with the actual consumption. Remember to make a habit of checking the merchant information on the POS slip after swiping the card. habits. If your phone receives a verification code from an unknown source, criminals may be attacking your phone. At this time, you should turn off your phone immediately or activate airplane mode. If you see a verification code sent by a bank or other financial institution, but it was not done by yourself, in addition to turning off your mobile phone, you should also freeze the bank card as soon as possible to reduce losses, and retain the text message content to call the police in time. Modify POS machine? Steal card number and password. After interrogation, the police discovered that the criminal gang modified the POS machines and sold them to many places across the country, and specially selected small stores far away from the city to sell them at low prices. Once consumers swipe their cards at such POS machines, a series of criminal activities will follow. The suspect confessed that the POS machines that committed the crime included several popular brands on the market. After modification, the appearance of the POS machines was the same, but because the chip was inside the machine, the victim could not find it at all. According to the police in Yanjin County, Henan, this criminal gang sold their modified POS machines to small stores, and consumers' bank card numbers and payment passwords were unknowingly stolen by the suspects.