Ars Technica reported that multiple users have have noticed suspicious advertisements appearing everywhere on YouTube, and some of them found out that those ad banners let attackers make profit mining Monero while users watched videos. Miners managed to use users' CPUs and electricity to obtain digital currency.
Youtube Mining Code
YouTube was likely targeted because users are typically on the site for an extended period of time.
Independent Security Researcher
There's no indication that attackers install any kind of malware as long as people don't click on malicious downloads. It still remains unclear how many coins were mined by the malicious ads on Youtube.
Earlier today, we have reported that there was a possibility of Monero collaborating with Litecoin cryptocurrency.
At the moment of press, these are main market parameters of Monero:
Average price: $319,32
Marketcap: $5 000 184 963
24h volume: $75 967 600