The exchange said it's working to bring services back online following the attack.
While the site was inaccessible, Bitcoiners shared the software to newcomers wanting to download Bitcoin's code.
NZX has halted trading for the third day in a row as a result of cybercriminals attempting to extort cryptocurrency.
Both cryptocurrency exchanges have reported distributed denial-of-service (DDoS) attacks on their systems in the last 24 hours.
A report by a group of cybersecurity researchers found that cryptojacking instances jumped more than 400 percent in a year.
A website that serves as a central hub for a newly created cryptocurrency project went down today shortly after a successful, scheduled launch.
The EU’s top law enforcement agency has announced a new crackdown on the DDoS attack group DD4BC, which demands ransom in bitcoin.
Bitcoin exchange BTC-e was offline for several hours today after the site said that it was the target of a distributed denial-of service attack.
A number of privacy-oriented email service providers have been targeted by DDoS extortionists demanding payment in bitcoin.
An e-tailer is offering a $23,181 bounty to catch those who launched a DDoS attack against the firm's site before demanding a bitcoin ransom.
New Jersey-based online casinos were hit with distributed denial-of-service attacks and faced additional threats unless they paid a bitcoin ransom.
Two Hong Kong banks were targeted with distributed denial of service (DDoS) attacks earlier this week by unknown parties demanding bitcoin ransoms.
Distributed denial-of-service attacks against organizations in New Zealand appear to be connected to the extortionist group DD4BC.
A number of bitcoin mining pools around the world have been hit by a recent string of DDOS attacks.
An advanced DDoS attack has forced online black market Silk Road 2.0 to suspend services to maintain security.