Proactive techniques to stop & squish a botnets: technically feasible but legal too?

Proactive Botnet Countermeasures An Offensive Approach

Abstract. Botnets, consisting of thousands of interconnected, remote-controlled computers, pose a big threat against the Internet. We have witnessed the involvement of such malicious infrastructures in politically motivated attacks more than once in recent years. Classical countermeasures are mostly reactive and conducted as part of incident response actions. This is often not sufficient. We argue that proactive measures are necessary to mitigate the botnet threat and demonstrate techniques based on a formalized view of botnet infrastructures. However, while being technically feasible, such actions raise legal and ethical questions.

Introduction
A botnet is an alliance of interconnected computers infected with malicious software (a bot). Bots are commanded by an operator and can typically be advised to send Spam mails, harvest information such as license keys or banking data on compromised machines, or launch distributed denial-of-service (DDoS) attacks against arbitrary targets. What’s more, they often interfere with regular operation rendering infected machines unstable or unusable. Thousands of such botnets exists, with each containing thousands to millions of infected systems. The result are major direct and indirect consequences for economy as well as for the political life [2].

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