Some websites are using your CPU for crypto mining

Be careful, because nowadays some websites attackers can use your PC for mining cryptocurrency
30 November 2017   2205

In the previous research conducted by security IT-companies, it was found that a miner could be run as long as the web browser was running. Should you close the browser and mining activity stops as well. However, as per the latest technique spotted by Malwarebytes, some suspicious website owners can mine crypto coins like Monero even after browser software is closed.

How it works and is it possible to prevent it?

It was found that when a user visits a website, there is a light growth in the CPU activity. As the activity is not maxed, the user doesn’t notice anything strange. Once the user closes the browser application, the CPU activity is still remains higher than normal and cryptomining process continues. So what’s the trap? How are webcriminals capable to do this?

Actually, even when you close the browser, there’s one hidden pop-under window that still remains open. It’s sized to fit under the taskbar and hides behind the clock. The coordinates of this window might be different, but it all in all follows x -100 and y -40 position principle.

Persisting hidden cryptomining

You can broaden the taskbar to spot the window, enabling transparency might also help you.

To spot that sort of activity, you can run Task Manager and ensure that there are no browser processes hiddenly running. You can also look for the highlighted browser icon in the taskbar field.

Bear Market to Hit Mining Hard

BitMEX research division presented an analysis of the impact of market decline on the mining industry
11 December 2018   75

The cryptocurrency market has experienced a marked decline over the past weeks. The BitMEX research division presented an analysis of the impact of these events on the mining industry. Bitcoin hash rate has fallen by 31% since the beginning of November, which is equivalent to the capacity of 1.3 million Bitmain S9 devices. From this, BitMEX concludes that miners as a class are in a difficult situation, however, they may have different conditions, and those who pay more for electricity, are forced to turn off their equipment first, while others may still be quite viable.

The decrease in the price of Bitcoin by 45% since the beginning of November has already caused two recalculations of the complexity of mining to the lower side - by 7.4% and 15.1% on November 16 and December 3, respectively. The first recalculation turned out to be the largest since January 2013, the second - since October 2011.

Bitcoin mining revenue fell from $ 13 million per day in early November to $ 6 million per day in early December. The fall in the size of the miner's encouragement turned out to be even more rapid than the fall in the price of cryptocurrency. This is due to the delay in recalculating the complexity of mining. For the six-day period ending December 3, 21.8% fewer blocks were mined than expected, since the miners left the network before recalculating the difficulty. As a result, in addition to reducing the size of the miners' encouragement in dollar terms, due to lower asset prices, they received 21.8% less bitcoin awards.

One of the popular reasons for the recent decline in the cryptocurrency market is that miners sold bitcoins to cover their costs of hash warsin the Bitcoin Cash network. The monitoring platform Boltzmann recorded an unusually large sale of Bitcoin by the miner on November 12, that is, 3 days before the hard fork of Bitcoin Cash.

BitMEX assumes that the actions of miners over the past weeks could have played a significant role in reducing the market, however, recommends not overestimating their value and reminds that in a bearish trend, prices continue to fall regardless of asset movements and news.