Identifying and using DNS contextual flows

In one embodiment, a device in a network captures domain name system (DNS) response data from a DNS response sent by a DNS service to a client in the network. The device captures session data for an encrypted session of the client. The device makes a determination that the encrypted session is malic...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Anderson, Blake Harrell, Mcgrew, David, Wing, Daniel G, Andreasen, Flemming
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:In one embodiment, a device in a network captures domain name system (DNS) response data from a DNS response sent by a DNS service to a client in the network. The device captures session data for an encrypted session of the client. The device makes a determination that the encrypted session is malicious by using the captured DNS response data and the captured session data as input to a machine learning-based or rule-based classifier. The device performs a mediation action in response to the determination that the encrypted session is malicious.