If it is only a mining script (which the name also suggests)... Why is it, that when you google "JS:Miner-C" you get results like:
https://www.fortiguard.com/encyclopedia/virus/7526385"JS/Miner.C!tr is classified as a trojan."
http://computerfixguide.com/how-to-remove-jsminer-c-effectively-windows-os-and-mac-os/"JS:Miner-C is an dangerous Trojan Horse that invades Windows and MAC machines silently and opens backdoor for Adware or PUP."
http://greatis.com/blog/howto/remove-jsminer-c.htm"JS:MINER-C causes the great problems for you, such as replacing your browser starting page with malicious one, browser search redirecting, changing security settings and allowing popup advertisements to show up."
http://quickremovevirus.com/methods-to-remove-jsminer-c-completely/"JS:Miner-C is a Trojan and its danger index can ranked as severe. you should delete JS:Miner-C as soon as possible, especially before the tragedy happened."
http://getridofmalware.removemalwares.com/jsminer-c-deletion-effective-way-to-uninstall-jsminer-c-manually"Somehow, the virus can also encrypt your files if you do not get rid of it immediately. Even, the virus may ask you to pay ransom to anonymous hackers."
These are sites making different claims. Any explanation for this?
Javascript (assumed that's what virusscanners refer to by "js") can only instruct the browser-window that runs the script in a very limited way (for safety purposes). In other words, JS itself can only play by the browser's rules. AFAIK, when only javascript is involved, only an undiscovered exploit in a browser could lead to problems as big as described by these sites.
So, why would they publish this information?