|
Comparing Alternatives to Measure the
Impact of DDoS Attack Announcements on Target Stock Prices University of
Twente Drienerlolaan 5,
7522 NB Enschede, The Netherlands {s.abhishta,
r.a.m.g.joosten, l.j.m.nieuwenhuis }@utwente.nl Abstract Distributed denial of service (DDoS)
attacks are responsible for creating unavailability of online
resources. Botnets based on internet of things (IOT) devices are now being
used to conduct DDoS attacks. The estimation of direct and indirect economic
damages caused by these attacks is a complex problem. In this article we
analyze the impact of 45 different DDoS attack announcements on victim firm's
stock prices using three different approaches and compare the results. We
show that the assumption of cumulative abnormal returns being normally
distributed leads to overestimation/underestimation of the impact. We solve
this problem by using an empirical distribution of cumulative abnormal
returns for hypothesis testing. Finally, we demonstrate the impact of DDoS
attack announcements in each of the cases. Keywords: DDoS attacks, stock market study, event study, economic impact. +: Corresponding author: Abhishta Journal
of Wireless Mobile Networks, Ubiquitous Computing, and Dependable
Applications (JoWUA) Vol. 8, No. 4, pp. 1-18,
December 2017 [pdf] |