Not too long ago, in line with Tuoi Tre newspaper, the Division of Cyber Safety and Excessive-Tech Crime Prevention (PA05) Ho Chi Minh Metropolis Police Division has warned folks towards new subtle scams. Accordingly, high-tech criminals can faux to be buyer care workers of carriers, banks, e-wallets, and so on.
These folks say they themselves contact the person to resolve the issue, then they’ll ask the shopper to textual content **21*# or DS to 901. These are two syntaxes that want excessive care. with the message DS despatched to 901 is the syntax to vary the telephone SIM by way of the clean SIM clean.
Excessive-tech criminals can perform fraud by instructing and alluring customers to improve their telephone SIMs to 4G, 5G SIMs for folks to textual content in line with the above syntax. Instantly after composing the above message, the person will utterly lose management of his SIM. Right now, the “authentic SIM” has belonged to the fraudster’s arms. From there, criminals can simply commit crimes by accessing e-wallets, acquiring OTP codes, on-line fee purposes simply and appropriating cash in customers’ accounts.
Based on Vietnamnet, the syntax **21* telephone variety of the scammer#OK (command in line with the USSD protocol) is the decision forwarding syntax (Name Ahead). This syntax permits the cellular subscriber to redirect calls to a different telephone quantity. This type of fraud is extra subtle as a result of after profitable implementation, subscribers will nonetheless have waves, obtain SMS messages or enter the community usually.
However all calls from that time on will probably be redirected to the scammer’s telephone quantity with out the subscriber’s data. Fraudsters will benefit from this to hijack calls, log in to e-wallet purposes, social community accounts… by clicking Forgot login password and choosing the characteristic to obtain calls/message OTP code notification.