Warning of new scam tricks: Pretending to be a carrier to appropriate the right to use phone SIM

 In recent times, fraudsters and high-tech criminals have performed tricks to impersonate customer care staff of carriers, banks, and e-wallets to assist in solving problems for customers. . During the exchange, the bad guy asks the customer to text with the syntax **21*#. In fact, **21*# is a call forwarding syntax - a service of network operators such as Mobifone, Vinaphone, and Vietnamobile that allows mobile subscribers to redirect calls to an on-network phone number or net. Next, the subjects will log in to the electronic wallet applications (MoMo, Zalo Pay, Viettel Pay, ...) of the victim remotely. E-wallet switchboards will call to provide OTP code, but this call is redirected to the subject's phone number. From there, the bad guy appropriated the money in the wallet, the bank account associated with the wallet.

In addition, the bad guys can also ask customers to send text messages using the DS syntax to send 901. This is the syntax to change the phone SIM through a blank SIM card by texting method (SMS). Accordingly, the subject will send fraudulent messages with the content to help users upgrade the phone SIM to a 4G, 5G SIM. These objects require the user to text in the above syntax. When the operation is successful, the user will lose control of the SIM because the fraudster's SIM becomes the genuine SIM. At that time, the subject will access the e-wallet application, online payment application to appropriate money.

Or maybe the subject asks the victims to text in the syntax provided by the subject. However, this is actually a syntax for service users to allow mobile subscribers to redirect calls to any phone number. After the victim successfully sends the message he wrote with the above syntax, he will lose control of his phone SIM. Accordingly, all calls to users' subscribers are immediately forwarded to the phone number of the scammer. At this time, the fraudster easily takes over the victim's social network account, bank account, e-wallet, etc. by logging in and selecting the "Forgot Password" feature. The service provider will send an authentication code (OTP) to the SIM card of the phone the subject has just taken. Scammers easily take over the victim's social media accounts, bank accounts, and e-wallets.

In addition to fraudulently appropriating the victim's money in bank accounts and e-wallets, the subjects also used the victim's information to borrow money through online lending apps, leading to the victim being victimized. owe large sums of money.

Need to be wary of the above tricks, absolutely do not text with strange syntax

In order not to be scammed, people need to raise their vigilance and absolutely do not follow the subjects if they fall into the situations mentioned above. According to security experts, with the scam method mentioned above, if the scammer has enough other personal information, it is very easy to activate a new password to appropriate money. But not only losing money, users also risk having to bear the debt because these objects can also use the information obtained to borrow money from applications, even credit institutions.

Actually, this trick is not too new, in fact, some credit institutions have recorded information about this. Specifically, there are a number of cases where a fraudster takes control of the phone SIM, thereby appropriating money in the customer's bank account, activating a credit card, applying for a consumer loan, making purchases. online based on phone number.

Experts stress that a mobile subscription can be the key to getting into a user's most important accounts. Therefore, users absolutely do not follow the syntax requested by others without carefully understanding and looking up information.