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Domain Name Parking

Domain Name Parking

• CERT/CC Blog
Jonathan Spring

Hello, this is Jonathan Spring with my colleague Leigh Metcalf. Today, we're releasing a CERT/CC whitepaper on our investigations into domain name parking. The title summarizes our findings neatly: "Domain Parking: Not as Malicious as Expected." First, let's review some definitions to make sure we're all on the same page. Domain parking is the practice of assigning a nonsense location to a domain when it is not in use to keep it ready for "live"...

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Vulnerability Discovery for Emerging Networked Systems

Vulnerability Discovery for Emerging Networked Systems

• CERT/CC Blog
Allen Householder

Hi folks, Allen Householder here. I want to introduce some recent work we're undertaking to look at vulnerability discovery for emerging networked systems (including cyberphysical systems like home automation, networked cars, industrial control systems and the like). In this post I cover the background and motivation for this work, our approach, and some preliminary findings. In future posts I will cover additional results from this effort....

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Domain Blocking: The Problem of a Googol of Domains

Domain Blocking: The Problem of a Googol of Domains

• CERT/CC Blog
Jonathan Spring

Hi all, this is Jonathan Spring. I've written a bit about some challenges with blacklisting, such as about the dynamics of domain take-down: why e-crime pays (domains are so cheap it almost always pays) and comparisons among blacklists (they are largely disjoint, calling into question comprehensiveness)....

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Smart Collection and Storage Method for Network Traffic Data

Smart Collection and Storage Method for Network Traffic Data

• CERT/CC Blog
Angela Horneman

Hi, this is Angela Horneman from the CERT Situational Awareness Analysis team. Recently, Nathan Dell and I were asked to explore ways to improve network traffic data storage by determining what data to store to meet organizational needs. Our research, brainstorming, and discussions led us to create a methodology to help organizations determine what types of traffic to collect and what parts of the collected traffic to keep....

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A Subversive Use of SiLK

A Subversive Use of SiLK

• CERT/CC Blog
Leigh Metcalf

Hi, this is Leigh Metcalf. In this blog post I talk about a subversive use of SiLK, the open-source tool suite designed by the CERT/CC team at the SEI, available on the CERT website. This post is a technical walk through of how to use the SiLK tools to support analysis in interesting ways you may not have thought of....

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Probable Cache Poisoning of Mail Handling Domains

Probable Cache Poisoning of Mail Handling Domains

• CERT/CC Blog
Jonathan Spring

Hi, this is Jonathan Spring with my colleague Leigh Metcalf. For some time now, we've been working through a problem we found, but it's time to discuss it more broadly. Using our passive DNS data source, we can observe cache poisoning. What we really observe are changes in the answers that are returned for certain domains, but after consulting with various experts, we believe the only behavior these changes indicate is a successful cache poisoning...

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Announcing CERT Tapioca for MITM Analysis

Announcing CERT Tapioca for MITM Analysis

• CERT/CC Blog
Will Dormann

Hi folks, it's Will. Recently I have been investigating man-in-the-middle (MITM) techniques for analyzing network traffic generated by an application. In particular, I'm looking at web (HTTP and HTTPS) traffic. There are plenty of MITM proxies, such as ZAP, Burp, Fiddler, mitmproxy, and others. But what I wanted was a transparent network-layer proxy, rather than an application-layer one. After a bit of trial-and-error investigation, I found a software combination that works well for this purpose....

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