Coinhive, the Javascript-written mining software, earned up to $250,000 in cryptocurrency mining more than a thousand of Monero coins in four weeks, a research paper claims.

Researchers from the German University of Aachen found that amid a sharp drop in interest in non-industrial mining, the demand for the hidden Coinhive ьiner, on the contrary, is growing. They studied the activity of hidden mining software this spring and found that with the help of Coinhive, about 1.18% of the blocks in the Monero network were mined.

The most popular scheme for using Coinhive was its inconspicuous introduction into hacked websites. Users who opened pages infected with miner, began unconsciously to mine cryptocurrency on their computing powers.

"If we sum up the block rewards of the actually mined blocks over the observation period of 4 weeks, we find that Coinhive earned 1,271 XMR," the report reads.

Also, German researchers found that only a small group of hackers stand behind hacking websites the spreading of Coinhive. Most of the coins that were mined went to only 10 addresses.

"In fact, 1/3 of all links are contributed by a single user only and roughly 85% of all links are created by only 10 users."

Coinhive was released in 2017 primarily for sites that did not want to run outrageous advertisements, but needed funding. The compromise was that the site would warn users that if they do not want to watch advertisements, then they will have to agree that their computer capacities will be used for mining. But as a result, Coinhive became a favorite tool for scammers. It accounts for 75% of all browser-based hidden mining. Other popular mining software programs are AuthedMine, WP Monero Miner and CryptoLoot.