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2 Journal of Telecommunications and Information Technology

2 2019

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WannaCry Ransomware: Analysis of Infection, Persistence, Recovery Prevention and Propagation Mechanisms

Akbanov Maxat, Vassilakis Vassilios G., Logothetis Michael D.

Journal of Telecommunications and Information Technology

2019

nr 1

113--124

In recent years, we have been experiencing fast proliferation of diﬀerent types of ransomware targeting home users, companies and even critical telecommunications infrastructure elements. Modern day ransomware relies on sophisticated infection, persistence and recovery prevention mechanisms. Some recent examples that received signiﬁcant attention include WannaCry, Petya and BadRabbit. To design and develop appropriate defense mechanisms, it is important to understand the characteristics and the behavior of diﬀerent types of ransomware. Dynamic analysis techniques are typically used to achieve that purpose, where the malicious binaries are executed in a controlled environment and are then observed. In this work, the dynamic analysis results focusing on the infamous WannaCry ransomware are presented. In particular, WannaCry is examined, during its execution in a purpose-built virtual lab environment, in order to analyze its infection, persistence, recovery prevention and propagation mechanisms. The results obtained may be used for developing appropriate detection and defense solutions for WannaCry and other ransomware families that exhibit similar behaviors.

Battery Drain Denial-of-Service Attacks and Defenses in the Internet of Things

Ioulianou Philokypros P., Vassilakis Vassilios G., Logothetis Michael D.

Journal of Telecommunications and Information Technology

2019

nr 2

37--45

IPv6 Routing Protocol for Low-Power and Lossy Networks (RPL) is a popular routing protocol used in wireless sensor networks and in the Internet of Things (IoT). RPL was standardized by the IETF in 2012 and has been designed for devices with limited resources and capabilities. Open-source RPL implementations are supported by popular IoT operating systems (OS), such as ContikiOS and TinyOS. In this work, we investigate the possibility of battery drain Denial-of-Service (DoS) attacks in the RPL implementation of ContikiOS. In particular, we use the popular Cooja simulator and implement two types of DoS attacks, particularly version number modiﬁcation and “Hello” ﬂooding. We demonstrate the impact of these attacks on the power consumption of IoT devices. Finally, we discuss potential defenses relying on distributed intrusion detection modules.