ECIH 212-89 Syllabus Exam Questions Answers

Auditing the system and network log files is a crucial step in the incident triage phase of the incident response and handling process. During incident triage, incident handlers assess and prioritize incidents based on their severity, impact, and the urgency of the response required. Part of this assessment involves reviewing log files to understand the nature of the incident, its scope, and the systems or networks affected. This information helps in categorizing the incident and deciding on the appropriate response actions. Unlike containment, which aims to limit the damage, incident disclosure, which involves communicating about the incident, or incident eradication, which focuses on removing the threat, incident triage is about evaluating and prioritizing the incident based on detailed log analysis among other factors.

In the incident handling and response (IH & R) process, backing up the data on affected systems is a critical step that usually falls under the Containment phase. The Containment phase is crucial for limiting the scope and severity of an incident, ensuring that it does not spread further or affect additional systems. Backing up affected systems during containment is essential for several reasons: it preserves a snapshot of the system in its current state for forensic analysis, ensures that data is not lost if the system needs to be wiped or altered during the response process, and helps in the recovery process if data is corrupted or lost.

By performing a complete backup of the infected system during the Containment phase, Alice ensures that there is a reliable copy of all data and system states before any major actions, such as eradication or deeper forensic analysis, are taken. This step is also preparatory for the potential use of the backup in analyzing how the incident occurred and in restoring system functionality after the incident is resolved.

During incident detection and validation, ECIH v3 emphasizes distinguishing genuine malicious behavior from legitimate system activity before applying potentially disruptive response measures. Behavioral analysis establishes normal baselines and identifies deviations such as abnormal data transfers, unusual privilege use, unexpected processes, irregular access patterns, and other indicators of compromise. This makes it particularly suitable when multiple endpoint anomalies require rapid validation. Disconnecting every affected endpoint is a containment measure and may be warranted after compromise is established, but doing so before validation can unnecessarily disrupt business operations. Restricting permissions across all endpoints is similarly broad and may alter evidence or interfere with normal activity. An external consultancy could assist with complex incidents but would introduce unnecessary delay. Advanced behavioral analytics therefore provides the most efficient method for validating whether the observed activity is malicious.

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This question focuses on post-incident recovery and resilience, a key ECIH concept. After restoring services, organizations must strengthen defenses to prevent recurrence.

Option B is correct because Content Delivery Networks (CDNs) distribute traffic and absorb volumetric attacks, while blackhole routing discards malicious traffic upstream. ECIH identifies these as industry-standard controls for DDoS resilience.

Options A, C, and D weaken security or increase attack surface and contradict ECIH guidance.

ECIH stresses that recovery is not complete until preventive measures are implemented. CDN deployment and upstream traffic control significantly improve availability during future attacks.