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Infoblox releases DNS Threat Index

Rod Rasmussen, Infoblox
Rod Rasmussen, Infoblox

Infoblox has announced the Infoblox DNS Threat Index, which measures the creation of malicious Domain Name System (DNS) infrastructure, unexpectedly rebounded to near record levels in the fourth quarter of 2015.

Infoblox researchers also found that 92 percent of newly observed malicious domains in Q4 were hosted in either the United States or Germany.

After dipping in Q3 2015, the Infoblox DNS Threat Index in Q4 2015 increased to 128—near the record high of 133 established in Q2 2015. This is a rise of 49 percent from Q4 2014, and an increase of five percent from the previous quarter, meaning the number of malicious domains is increasing from quarter to quarter and year to year.

The results break with previous cycles where record high threat levels (indicating the “planting” of malicious new infrastructure) were followed by several quarters of relative quiet as cybercriminals used that infrastructure to harvest data and harm victims. This also means the threat index for all of 2015 has been well above its historical average, meaning that organizations of all sizes and types continue to face unrelenting attacks.

“Our findings may indicate we’re entering a new phase of sustained and simultaneous plant/harvest activity,” said Rod Rasmussen, Vice President, Cybersecurity, Infoblox. “As we see this escalation of efforts by cybercriminals, it is essential we go after the infrastructure that cybercriminals are using to host these domains. So, for the first time, we are using the index to highlight the countries with the most hosting locations for bad domains.”

The Infoblox DNS Threat Index tracks the creation of malicious DNS infrastructure, through both registration of new domains and hijacking of previously legitimate domains or hosts. The baseline for the index is 100, which is the average for creation of DNS-based threat infrastructure during the eight quarters of 2013 and 2014.

DNS is the address book of the Internet, translating domain names such as www.google.com into machine-readable Internet Protocol (IP) addresses such as 74.125.20.106. Because DNS is required for almost all Internet connections, cybercriminals are constantly creating new domains and subdomains to unleash a variety of threats including exploit kits, phishing, and distributed denial of service (DDoS) attacks.

The report highlighted that the US is the clear country of choice for hosting and launching attacks using malicious DNS infrastructure in Q4 2015, which accounted for 72 percent of newly observed malicious domains. Germany (20 percent) was the only other country to account for more than two percent of the observed malicious sites. While much cybercrime originates from hotspots in Eastern Europe, Southeast Asia, and Africa, this analysis shows the underlying infrastructure used to launch the attacks themselves sits elsewhere—in the backyard of the world’s top economies.

“It would be a silver lining if US hosting providers were quick to take down malicious content at dangerous domains once they’re identified, but they are not,” said Lars Harvey, Vice President, Security Strategy, Infoblox. “The fact of the matter is that many hosting providers can be slow to respond, allowing exploits to propagate for considerably longer than they should. This should be a key area of focus for improvement.”

Infoblox also found that exploit kits are a particularly alarming category of malware because they represent the automation of cybercrime. A small number of highly skilled hackers can create the kits, which are packages for delivering a malware payload, and then sell or rent these toolkits to ordinary criminals with little technical experience. This can vastly increase the ranks of malicious attackers capable of going after individuals, businesses, schools, and government agencies.

While Angler continues to lead DNS exploit kit activity, RIG—an older kit that has been far back in the pack in usage during previous quarters—surged into second place. Infoblox analysis of RIG activity in 2015 shows that it began using domain shadowing techniques similar to those pioneered by Angler to defeat reputation-based blocking strategies. This indicates that as exploit kits are updated in coming years, there may be a reappearance of past threats in a new guise or location.

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