Earlier this week, starting on Monday, December 14, a massive 40 Gbps DDoS attack hit Turkey's root DNS servers managed by NIC.tr, Turkey's administrative body that handles the country's main DNS servers and its .tr domain names inventory.

In a video posted on YouTube, Anonymous has now taken credit for the attack. The hacker collective is trying to justify its actions as part of its war on ISIS, the #OpISIS campaign.

According to the group's statement, "Turkey is supporting Daesh [ISIS] by buying oil from them, and hospitalising their fighters."

Anonymous also said that if Turkey's pro-ISIS actions didn't stop, they'd continue to attack the country's root DNS servers, banks, government sites, airports, military assets, and private state connections.

In the DDoS attacks on Turkey's DNS servers this past week, the hackers managed to bring down all of Turkey's five main name servers, which eventually gave in to pressure and went offline on Monday night, effectively taking with them over 400,000 websites with the .tr domain.

The servers were brought back online by Monday evening, but access to .tr domains was restricted only to a few trusted IP ranges, with most Turkish sites remaining isolated from the Internet.

Attacks continued the following days, but at a smaller scale, with the DNS service recovering to its full operational state by the end of the week.