Researcher developed hidden miner for public Wi-Fi

An anonymous researcher was inspired by the hidden mining incedent in Star Bucks network in December 2017 in Buenos Aires
10 January 2018   552

Anonymous researcher under nickname "Arnau" published a concept and the associated investigation of the CoffeeMiner attack, which allows to mine through public Wi-Fi networks.

Created for educational purposes, the Arnau's study was inspired by an incident that occurred in December 2017 in Buenos Aires. Local network of Starbucks coffee houses was mining hiddenly with the help of devices connected to the public Wi-Fi network.

The CoffeeMiner attack is designed to spoof the Address Resolution Protocol (ARP) to intercept unencrypted traffic from devices on the same network.

For injection of HTML-code into unprotected traffic, the console program mitmproxy is used. As a result, JavaScript is launched, which draws CPU resources, using them for mining.

CoffeeMiner Concept
CoffeeMiner Concept

In his tests, the researcher used the popular "browser" mining script. Coinhive and extracted the Monero crypto currency.


Specialist notes that such an attack can be easily automated. And although in the current form CoffeeMiner can not work with HTTPS, this problem can be solved, for example, using sslstrip.

Source code is available at GitHub.

GMO Internet to Release 7nm Bitcoin Miner

Mass production is planned to begin on June 6;  shipment starting by the end of October
24 May 2018   115

Japanese IT-company GMO Internet intends to release the world's first devices for bitcoin mining based on 7-nm chips before the end of this year. This is reported by Coindesk.

The company will start production of the new B2 miner on June 6, and its deliveries will begin in late October.

The announcement was made after several months of research and development of technology for the future device. Company reported on its plans to develop ASIC miner last September. It is expected that the device will be able to provide greater computing power with less electricity, but more detailed information will be provided along with the official announcement in June.

In addition to selling B2 to other miners, GMO Internet plans to install new devices on its own farms. Last year, the company allocated $ 90 million to develop its own business in this area.