Jason, a forensic investigator, is investigating a large-scale cyber-attack on an organization ' s network...

Option D. Cuckoo Sandbox is the best answer because CHFI v11 explicitly includes tools to perform static and dynamic malware analysis , tools to analyze malware behavior on a system and network , and the preparation of a controlled malware analysis lab . Jason’s requirement is to mimic a live environment and observe the malware’s network behavior , which is exactly the role of a malware sandbox.

A sandbox such as Cuckoo allows the examiner to safely run the malware in an isolated setting while monitoring process activity, file changes, registry behavior, DNS requests, network connections, and other indicators needed to understand propagation and develop countermeasures. That makes it ideal for behavioral malware analysis.

IDA Pro is mainly for reverse engineering code. Sysinternals Suite contains valuable Windows utilities but is not a full isolated malware-behavior lab. Autopsy is used for disk and file-system forensic analysis rather than live behavioral execution. Therefore, under CHFI’s malware-forensics and sandbox-analysis objectives, the strongest answer is Cuckoo Sandbox .