Phishing attacks continue to remain the most popular attack vector and is driving a spike in DNS abuse:

No one attack campaign is behind the spike in malicious domains, but popular and pervasive exploit kits such as Angler are a big piece of the puzzle, he says. “The backend stuff is being done by domains,” he says.

DNS, which converts domain names into machine-readable IP addresses, has become a popular vehicle for the bad guys to use in the distribution of their malware, the theft of information, and distributed denial-of-service attacks.

The DNS Threat Index has been on the rise for three quarters straight. “This could indicate cybercriminals are expanding the infrastructure to leverage targeted attacks for spreadkign malware and/or exfiltrating data,” the Infoblox report said.

Internet pioneer and DNS expert Paul Vixie says there are ways to slow and possibly trip up DNS abuse. He has proposed a “cooling-off period” for DNS providers to activate new domains, an approach that would help minimize domain abuse. A new generation of inexpensive and quick startup domain names has made it easier for bad guys to set up shop in the DNS infrastructure, according to Vixie.