Update Monday, January 29, 2018 4:00 PM CET: Arenavision reached out to Avast on Twitter, claiming their site was hacked on January 16, 2018. Avast reexamined the JQuery file and can confirm the site is now clean and does not contain any mining algorithms. The below post has been updated to reflect this.
*** This is a Security Bloggers Network syndicated blog from Blog | Avast EN authored by Avast Blog. Read the original post at: https://blog.avast.com/arenavision-mines-cryptocurrency-monero-using-visitors-browsers-without-their-knowledge