New Captcha Hidden Miner Unveiled

Users' devices are forced to mine XMR while solving the captcha
13 February 2018   1592

Hackers attack users of mobile devices based on Android again.They use well known XMR mining script Coinhive. This time, to keep users on their page longer, they offer them to solve the captcha. 

According to the company Malwarebytes, this scheme scammers have been using active since November last year. Users are being attracked to the malicious website by the ads.

Users are encouraged to enter captcha, which can sometimes be difficult due to the inconvenience of the keyboard of mobile devices. This feature is used by hackers, downloading the processors of their victims for 100% for the Monero mining.

Captcha Miner
Captcha Miner

It is noteworthy that the solution of captcha does not give the desired result - users are simply redirected to the Google homepage.

It is difficult to determine how much Monero currency this operation is currently yielding without knowing how many other domains (and therefore total traffic) are out there. Because of the low hash rate and the limited time spent mining, we estimate this scheme is probably only netting a few thousand dollars each month. However, as cryptocurrencies continue to gain value, this amount could easily be multiplied a few times over.

Malwarebytes Team

Researchers found 5 domains used in the campaign, each of which hosts the same page with the same captcha. According to their estimates, all five pages on average visit 800,000 users a day, being on them for 4 minutes.

Amberdata to Study Abnormal ETH Miners Rewards

As reported, unknown person mixed up the “gas price” field and “transaction cost”, left the workplace, and the bot did not work correctly
21 February 2019   56

The research startup Amberdata analyzed the activity of the Ethereum network in the last 24 hours and, like the media, found five transactions with an abnormally high commission.

It turned out that all five transfers were made from one address. Within four hours, the owner of the address paid the miners about $ 583,976 for processing transactions.

Note that the commission for block # 7,238,290 in the amount of 2103,1485 ETH, which was received by the Sharkpool pool, is the largest in the history of the network. Nevertheless, representatives of the pool temporarily froze funds in case the owner of the address made a mistake.

Amberdata is convinced that an unknown person mixed up the “gas price” field and “transaction cost”, left the workplace, and then the bot did not work correctly.