Popular cryptocurrency exchange Bitfinex came under DDoS attack on Tuesday. Hong Kong-based Bitfinex has sent out several emails to its clients to inform them of the disruption, but the exchange is currently accessible - albeit only after visitors undergo a check by DDoS protection service, Cloudflare:
http://www.razor-forex.com/2017/02/bitfinex-top-bitcoin-exchange-comes.htmlThe article doesn't mention whether there were any ransom demands. It is kind of pointless to do a DDOS without any ransom demand (unless you are an unethical competitor). In any case, they have got cloudflare now. It is a minor irritation, but better than not being able to access the website.