ECCouncil 312-49v11 - Computer Hacking Forensic Investigator (CHFIv11)

The correct answer is C because Faraday isolation directly addresses the threat described in the question: remote alteration through wireless communication. Mobile devices can still receive network commands, wipes, synchronization changes, or other signal-triggered activity after seizure unless radio communications are blocked. Guidance from the U.S. Department of Justice states that Faraday isolation bags are used to prevent mobile phones and devices from connecting to communication signals. That makes this the most direct preservation measure for preventing remote changes. Option A is an important general forensic practice, but it does not stop wireless communication to a still-active mobile device. Option B concerns environmental storage conditions, and option D supports integrity verification after collection, but neither blocks remote access. CHFI v11 includes evidence preservation, first response, and mobile forensics processes, all of which require examiners to recognize how to secure live mobile devices against external interference. When the risk is remote signal-based tampering, the best immediate mitigation is to isolate the device from communications using a Faraday bag or equivalent shielding.

Option D is the strongest answer because the scenario clearly describes a multi-tenant cloud environment in which the provider failed to properly separate one customer’s resources from another’s. That is the classic problem of insufficient resource isolation . When tenant separation is weak, an attacker can cross boundaries between customer environments, access unauthorized data, and potentially move laterally across shared infrastructure.

This fits the fact pattern far better than the other options. Failure in due diligence concerns poor vendor selection, but the direct technical cause here is not selection error; it is the isolation failure itself. Loss of client control is a general cloud concern but does not specifically explain how the breach occurred. Lack of monitoring may explain why the attack went unnoticed, but it is not the root threat described in the question.

From a CHFI cloud-forensics perspective, investigators must recognize threats linked to multi-tenancy , data segregation failures , and provider-side weaknesses in shared environments. Since the breach affected several accounts because tenant boundaries failed, the correct answer is insufficient resource isolation causing cross-tenant data exposure .