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   935

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.

Bitmain to File IPO Application

The application was sent to Hong Kong Stock Exchange (HKEX)
27 September 2018   454

The largest mining company Bitmain has submitted to the Hong Kong Stock Exchange (HKEX) listing application for an initial public offering (IPO), according to CoinDesk.

The application is a draft option, and some of its details, in particular the number of shares offered for sale and the immediate date of the IPO, are still in the process of editing.

Nevertheless, the document indicates that last year Bitmain's revenue was $ 2,517,719,000. This figure is higher than in 2016 ($ 277,612,000). As of June 30, 2018, the company's revenue was $ 2,845,467,000.

The application said that in 2017 the gross profit of the company was $ 1 212.7 million, which is also higher than in 2016 ($ 151,351,000).

Earlier, the head of Bitmain, Jihan Wu, expressed his indignation over the actions of the company's chief financial officer, who disclosed the figures for the first quarter 60 days after his end, and not after 90, as he had expected.

The media suggested that in the run-up to the IPO the publication of such information could have a negative effect on the company's investment attractiveness.

In addition, the document confirmed the media's information that Bitmain owns a 3% stake in Opera's Internet browser thanks to an investment of $ 50 million.

The application also indicates that the underwriters of the IPO are China International Capital Corporation Hong Kong Securities Limited, Commerce and Finance Law Offices, Maples and Calder LLP, KPMG and Frost & Sulliva