No wonder that cyber threats pose a significant risk to all of us be it individuals, organizations and nations. Cyber-attacks are becoming sophisticated day by day therefore understanding the attack methodologies used by cyber threat actors is crucial for defensive purposes. Here Cyber Kill Chain framework comes into play, it was developed by Lockheed Martin. The Cyber Kill Chain framework provides a well-structured approach to understand the various stages of a cyber-attack, from reconnaissance to data exfiltration. In this article, we discuss the first phase of the Cyber Kill Chain i.e. reconnaissance. The Cyber Kill Chain Overview The Cyber Kill Chain’s concept has been drawn from military strategy which was adapted for cybersecurity purposes. It outlines the steps of a cyber-attack, allowing defenders to understand effectively intervene in the cyber-attack process. The seven stages of the Cyber Kill Chain are: Reconnaissance: Collecting information about the target. Weaponization: Cyber attackers develop....