Crypto mining im browser
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And then Coinhive was gone. The site disappeared and the domain stopped resolving. Every site that had Coinhive running on it, either by the design of the site owner or at the whim of a cryptojacker, stopped mining Monero.
However, it was still making requests to the domain but without the name resolving anywhere, the only signs of Coinhive being gone were errors in the browser's developer tools. In May , I obtained both the primary coinhive. I'm not sure how much the person who made these available to me wants to share so the only thing I'll say for now is that they were provided to me for free to do something useful with.
I stood up a website and just logged requests. Every request resulted in a , but every request also went into a standard Azure App Service log. And that's where things got a lot more interesting. Firstly, the high-level stats and as I was routing through Cloudflare, it was super easy to look at the volume of requests first: That's a substantial number of requests; peaking at 3. But the number that really impressed me if "impressed" is the right word here More than 2 years after Coinhive was gone and the miner is still embedded in enough places to be serving more than k unique visitors per day.
I wonder where they're all coming from? Just for context, Have I Been Pwned which sees about k visitors per day has a geographical distribution as follows: I'm loath to draw stereotypical conclusions about the association of hackers to Russia and China, but it's a bit inescapable here. Later on, when I analysed the various URLs that were injecting Coinhive, there was anecdotally a strong presence of Russian and Chinese websites. The IP is Cloudflare's remember, they're a reverse proxy so it's their IP the website receives and the response code is as there was no resource to return.
It appears this user agent is used legitimately by some ASUS devices with fresh factory installs; however, as a new user agent only seen during this activity it is suspicious. Following successful exploitation, the server performs a callback on port , to retrieve script files. The scripts contained two IP addresses located in Korea and Ukraine. A connection was made to the Ukrainian IP to download executable file xm. The miner, XMRig Miner in this case is an open source, cross-platform mining tool available for download from multiple public locations.
This script deletes running tasks associated with logging, including SCM event log filter or PowerShell event log consumer. The script also requests a file from Pastebin, which is possibly a Cobalt Strike beacon configuration file. A config.
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Crypto Wallet To allow users to mine and make transactions with Monero — a secure, private, and untraceable digital currency — we integrated a Monero crypto wallet into the Minter browser. The crypto wallet lets users check their balance and send funds to external Monero crypto wallets. The underlying blockchain technologies that enable secure wallet operations are the mining pool, its proxy, and the miner algorithm.
Technical Challenges As with any software development project that involves the use of nascent technologies, our team ran into a couple of roadblocks. The initial idea was to use OpenVPN, but after additional research, the team opted for Shadowsocks — a more secure technology to implement a custom VPN. Shadowsocks has gained massive public acclaim as the primary tool to circumvent Internet censorship in mainland China. As a result of switching to Shadowsocks: The client got a browser with a more secure VPN that hides an IP address altogether The team built and integrated the VPN into Minter faster and with fewer resources Keeping Pace Brave became a great open-source platform to bootstrap the development of Minter, but after Velvetech had started engineering, the Brave team announced a switch to Chromium — a superior web browsing engine by Google.
In the end, we had to maintain compliance with new Brave versions and account for Chromium upgrades, which we handled flawlessly.
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