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The ever-growing number of cyber attacks from botnets has made them one of the biggest threats on the Internet. Thus, it is crucial to study and analyze botnets, to take them down. For this, an extensive monitoring is a pre-requisite for preparing a botnet takedown, e.g., via a sinkholing attack. However, every new monitoring mechanism developed for botnets is usually tackled by the botmasters by...
Existing failure diagnostic techniques for end users are insufficient to pinpoint the root causes of network failures due to their limited capabilities to probe other network elements. We present DYSWIS, an automatic network fault detection and diagnosis system for end-users. DYSWIS leverages user collaboration to distinguish important network faults from false positive indications, and diagnoses...
BitTorrent is currently the most popular peer-to-peer network for file sharing. However, experience has shown that BitTorrent is often used to distribute copyright protected movie and music files illegally. Consequently, copyright enforcement agencies currently monitor BitTorrent swarms to identify users participating in the illegal distribution of copyright-protected files. These investigations rely...
We present an approach to network devices behavior profiling based on NetFlow monitoring and a bidirectional flows extension. Behavior profiles of network devices typically focus on communicating peers, amount of traffic and traffic structure. However, using an implementation of the bidirectional flows standard we are able to distinguish between servers, clients and single flows directly which increases...
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