Tag Archives: DNS Security

Using DNS for “Local” Threat Intelligence

In a session I attended at the RSA Conference in San Francisco, one of the panelists was asked a question in the Q&A section about detecting malware that stays entirely in memory, i.e. Avoiding detection by never writing itself to disk. The panelist’s answer was insightful; he stated that malware still needs to communicate with […]

A DNS cache-busting technique for DDOS-style attacks against Authoritative Name Servers

During the course of a recent analysis of DNS traffic at a customer site, I noticed a high volume of requests had been made for a relatively small set of domains. As it turned out, the traffic was part of an attack on the customer’s DNS infrastructure; however, the point of these requests was initially […]

The Impact of Shellshock

Shellshock has been getting a lot of press as the worst security bug ever, but while it is terribly embarrassing for the open source movement, I believe the real world impact will be fairly limited. The bug is a fundamental flaw in bash, the command line interface on most Linux and Mac machines. (For once […]

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