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NCSAM 2013 Wrap-Up: Cisco Thought Leadership Regarding a Different Ghost in the Machine
Oct 31,2013
Is it the end of October already? As has been true for centuries, there is a tradition for children to wear costumes and disguise themselves while going door to door with a simple question: "Trick or treat?" While I am not sure there is a coincidence...
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A Smorgasbord of Denial of Service
Oct 25,2013
On October 22, 2013, Cisco TRAC Threat Researcher Martin Lee wrote about Distributed Denial of Service (DDoS) attacks that leverage the Domain Name System (DNS) application protocol. As Martin stated, the wide availability of DNS open resolvers combi...
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DNS Knows. So Why Not Ask?
Oct 18,2013
DNS is like the town gossip of the network infrastructure. Computers and apps ask DNS questions and you can ask DNS who has been asking to resolve malware domains. When internal trusted systems are using DNS to resolve the names of known malware site...
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Using DNS RPZ to Block Malicious DNS Requests
Oct 02,2013
After delivering several presentations at Cisco Live and Cisco Connect this year, I received a few questions regarding DNS Response Policy Zones (RPZ) and how can they be used to block DNS resolution to known malicious hosts and sites. I decided to w...
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Syrian Electronic Army Continues Spree: Cracks New York Times, Twitter and Huffington Post
Aug 27,2013
The Syrian Electronic Army continues to hammer away at media organizations.  This afternoon the Syrian Electronic Army appears to have compromised the registrar Melbourne IT which hosts the domains of notable media organizations like Twitter, Th...
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Syrian Electronic Army Cracks ShareThis.com GoDaddy Account
Aug 22,2013
ShareThis provides a mechanism for web surfers to share content online through a customizable widget.  According to the information on their website, ShareThis interacts with "more than 94% of U.S. Internet users across more than 2 million publi...
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DNS Compromise Distributing Malware
Aug 08,2013
DNS records are an attractive target for distributors of malware. By compromising the DNS servers for legitimate domains, attackers are able to redirect visitors to trusted domains to malicious servers under attacker control. DNS requests are served ...
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Error Correction Using Response Policy Zones: Eliminating the Problem of Bitsquatting
Aug 02,2013
A memory error is a condition that occurs any time one or more bits being read from memory have changed state from what was previously written.  By even the most conservative of estimates Internet devices experience more than 600,000 memory erro...
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Network Solutions Customer Site Compromises and DDoS
Jul 17,2013
Network Solutions is a domain name registrar that manages over 6.6 million domains. As of July 16, 2013, the Network Solutions website is under a Distributed Denial of Service (DDoS) attack. Recently, Network Solutions has been a target for atta...
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Hijacking' of DNS Records from Network Solutions
Jun 20,2013
UPDATE:This blog post is related to the redirection of domain name servers that occurred back in June 2013.  This post isNOTrelated to the ongoing activity occuring July 16, 2013.  Cisco TRAC is currently analyzing the ongoing issues with N...
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Foundational Network Traffic Collection and Analysis Setup
May 09,2013
This introductory post explains how one of Cisco's security research groups established a network data collection capability for large amounts of network traffic. This capability was necessary to support research into selected aspects of the Domain N...
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March Madness May Equal to Malware Madness
Mar 29,2013
Are you excited about March Madness? Turn on a TV and it will be hard to avoid the games, the news, the commentaries, and the jokes about it. If you eavesdrop in any restaurant, bar, or office conversation, I can assure you that you will hear so...
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