Why is creating a timeline important when a security incident is suspected?

Creating a timeline is crucial during a security incident because it helps determine the sequence of events that occurred. Understanding the sequence allows cybersecurity analysts to gain insights into how the incident developed, which actions were taken in response, and when those actions occurred. This chronological understanding aids in identifying how the attack was initiated, the tactics used by the adversary, and how effective the organization's response was at various points in time. Such clarity in the sequence of events is vital for conducting a thorough analysis and is instrumental in preventing future incidents by addressing vulnerabilities and improving incident response protocols.

While identifying potential threats, creating executive summaries, and assessing impacts are important steps in the incident response process, none are as foundational as establishing a timeline, which serves as the backbone for understanding the incident in its entirety.