How does ICBC 95588 send fraudulent text messages?

It is probably a pseudo base station fraud, not a real SMS sent by ICBC.

Liars use pseudo base station machines to imitate bank numbers, thus implementing fraud. So it's hard for ordinary people to tell. Remember that there is no pie in the sky.

I suggest going to ICBC in person and asking why. If it is not issued by ICBC, please modify the bank password in time.

A "pseudo base station" is a pseudo base station. A device generally consists of a host computer and a notebook computer or mobile phone. Mobile phone card information centered on it can be searched within a certain radius by SMS sender, SMS sender and other related devices. Taking advantage of the shortcomings of 2G mobile communication, mobile phone companies pretend to be the base station of an operator, falsely use other people's mobile phone numbers, and forcibly send short messages such as fraud, advertising and sales promotion to users' mobile phones.

Refer to CCTV News-Combating Telecom Fraud