Phish-Hook: Detecting Phishing Certificates Using Certificate Transparency Logs

Edona Fasllija, Hasan Ferit Enişer, Bernd Prünster

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Certificate misissuance is a growing issue in the context of
phishing attacks, as it leads inexperienced users to further trust fraudulent
websites, if they are equipped with a technically valid certificate. Certificate
Transparency (CT) aims at increasing the visibility of such malicious
actions by requiring certificate authorities (CAs) to log every certificate
they issue in public, tamper-proof, append-only logs. This work introduces
Phish-Hook, a novel approach towards detecting phishing websites based
on machine learning. Phish-Hook analyses certificates submitted to the
CT system based on a conceptually simple, well-understood classification
mechanism to effectively attest the phishing likelihood of newly issued
certificates. Phish-Hook relies solely on CT log data and foregoes intricate
analyses of websites’ source code and traffic. As a consequence, we are able
to provide classification results in near real-time and in a resource-efficient
way. Our approach advances the state of the art by classifying websites
according to five different incremental certificate risk labels, instead of
assigning a binary label. Evaluation results demonstrate the effectiveness
of our approach, achieving a success rate of over 90%, while requiring
fewer, less complex input data, and delivering results in near real-time.
Original languageEnglish
Title of host publication15th EAI International Conference on Security and Privacy in Communication Networks
PublisherSpringer
Publication statusPublished - 23 Oct 2019
Event15th EAI International Conference on Security and Privacy in Communication Networks - Orlando, United States
Duration: 23 Oct 201925 Oct 2019

Conference

Conference15th EAI International Conference on Security and Privacy in Communication Networks
Abbreviated titleSecureComm 2019
CountryUnited States
CityOrlando
Period23/10/1925/10/19

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