In the Lockheed Martin cyber kill chain, what step is discussed when a tool is delivered successfully?

The correct step in the Lockheed Martin cyber kill chain that discusses when a tool is delivered successfully is related to the Delivery aspect. In the cyber kill chain framework, Delivery refers specifically to the phase where the attacker successfully transmits the weaponized payload to the target. This could involve various methods such as phishing emails, malware-laden attachments, or exploiting unsecured connections to deliver malicious software.

Understanding this, Delivery is critical as it marks the transition from preparation to action, enabling the attacker to execute the subsequent stages of the kill chain. Once the delivery is successful, it paves the way for exploitation, where the attacker takes advantage of a vulnerability in the target system to execute the malicious payload. The concept of weaponization is important as well, but it occurs earlier in the process, where an attacker creates the malware designed to exploit a specific vulnerability.

Recognizing the distinction between these stages is crucial in cybersecurity, as it helps defenders to implement appropriate countermeasures at each stage of an attack.