The creation of a filesystem timeline is associated with which objective?

The creation of a filesystem timeline is a foundational technique in digital forensic analysis. By extracting and correlating file metadata—specifically Modified, Accessed, Created, and Change (MACC) timestamps—investigators can reconstruct a chronological sequence of events on a system. This timeline is essential for understanding an attacker's actions, such as when a malicious file was introduced, when data was exfiltrated, or when system files were altered. The primary objective is to analyze evidence to determine the scope and details of an incident, which is the core purpose of the forensic analysis phase.

B. First response: This phase focuses on initial evidence preservation (e.g., disk imaging) and containment, not the in-depth analysis required to build and interpret a timeline.

C. Access control: This is a preventative security measure to manage user permissions and restrict access to resources, which is unrelated to post-incident investigation.

D. Incident eradication: This phase involves removing the threat from the environment. Timeline analysis is the preceding step that identifies what needs to be eradicated.

1. National Institute of Standards and Technology (NIST). (2006). Special Publication 800-86, Guide to Integrating Forensic Techniques into Incident Response. Section 3.3.3, "Timeline Analysis," explicitly states, "One of the most useful things that an investigator can do during a forensic analysis is to create a timeline of events from the compromised system."

2. Carrier, B. (2005). File System Forensic Analysis. Addison-Wesley Professional. Chapter 11, "Timeline Analysis," is dedicated to the process of creating timelines from file system metadata to reconstruct events for a forensic investigation.

3. Maras, M. H. (2014). Computer Forensics: Cybercriminals, Laws, and Evidence (2nd ed.). Jones & Bartlett Learning. Chapter 7, "Digital Forensics Analysis," describes timeline analysis as a key method for "reconstructing the events that transpired" during the analysis phase of an investigation.

4. Casey, E. (2011). Digital Evidence and Computer Crime: Forensic Science, Computers, and the Internet (3rd ed.). Academic Press. Chapter 10, "Analysis and Correlation," discusses timeline analysis as a critical technique for correlating disparate data points to understand the sequence of events in a forensic case.