my country Customs seized GOIP electronic fraud equipment: 20 SIM card-less mobile phones were inserted to enable virtual dialing

News on July 2, according to the official public account of the customs, recently, when customs officers at the Friendship Customs were supervising the luggage and items of inbound passengers, they discovered an abnormality in the image of a passenger's luggage items passing through the plane. After unpacking and inspection, it was found that the passenger was carrying a set of GOIP devices, including 20 mobile phones without SIM cards inserted.

GoIP device

1. Device functions

This device supports multiple mobile phone cards operating at the same time and has the following functions:

• Remote control
• Virtual dialing

2. GoIP definition

GoIP (IP-based signal transmission) essentially digitizes mobile phone card signals. It is an upgrade of VoIP technology, usually in the form of GoIP gateway device.

3. Device characteristics

GoIP device is a kind of network communication hardware that supports mobile phone card access. Access the information service operator's network through a mobile phone card to achieve the following basic information network functions:

• Send and receive text messages
• Receive and make calls

4. Equipment model

Common GoIP equipment is divided into many types according to the following characteristics Model:

• Support operators (China Mobile, China Unicom, Telecom)
• Support frequency bands (GSM, CDMA, WCDMA, All Netcom)
• Support signals (2G, 3G, 4G)

5. Equipment capacity

A GoIP device with 32 card slots can accommodate hundreds of mobile phone cards running at the same time.

In order to evade crackdowns, fraudsters usually adopt the following methods:

1. Recruit "horse boys" to install GoIP devices in vacant rooms.
2. Use the card pool device to separate the mobile phone SIM card used for fraud from the GoIP gateway device, and obtain the mobile phone number of the SIM card in the card pool through the server.
3. Send SIM card information to GoIP through the server to make calls and send text messages.
4. Administrators can remotely operate and centrally manage terminal equipment, realizing the independent existence of humans, machines and cards, forming a separated model.
5. After the equipment is installed, you can remotely log in and use the equipment without personnel supervision, achieving the purpose of separating humans, machines, and cards, which greatly increases the difficulty of attack.

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