Cyber Kill Chain: The 7 Stages of an Attack Explained

Picus Security, a cybersecurity firm, has released an explanatory article detailing the seven stages of the Cyber Kill Chain. This model, initially developed by Lockheed Martin, maps the progression of an external attacker attempting to breach an organization's systems.

The framework covers the entire attack lifecycle, from initial reconnaissance and weaponization to installation, command and control, and achieving final objectives. By understanding these seven stages—reconnaissance, weaponization, delivery, exploitation, installation, command and control (C2), and actions on objectives—organizations can enhance their defensive capabilities.

Picus Security emphasizes the core principle that an attacker must succeed in all seven stages, while defenders only need to stop the attack at one point. This makes the kill chain a foundational tool for analyzing detection coverage and designing incident response.

The article elaborates on each stage. Reconnaissance involves attackers gathering information about a target, including its people, technology, and external exposure. Weaponization then involves pairing a malicious payload with a delivery mechanism tailored to discovered vulnerabilities.

Delivery is the phase where the weaponized tool reaches the target system, often via phishing. Exploitation occurs when the payload takes advantage of a vulnerability. Installation establishes persistent access, followed by command and control for remote management. Finally, actions on objectives are the attacker's ultimate goals, such as data exfiltration or system disruption.