212-89 Exam Dumps : EC Council Certified Incident Handler (ECIH v3)

ECIH insider threat guidance emphasizes continuous monitoring and behavioral analysis combined with background checks as the most effective deterrent against malicious insiders.

Option D is correct because insider threats often evolve after hiring. Continuous monitoring detects abnormal behavior patterns that static vetting cannot.

Options A–C are insufficient or ineffective against sophisticated insider threats.

Explanation (OT/IoT incident handling):

For smart grid and IoT/OT environments, the first step is to activate the dedicated incident response process that prioritizes safety and continuity while isolating affected components. Immediate shutdown (A) can create operational and safety consequences and should be reserved for clear safety threats. Firmware updates (B) are risky during an active incident; updating can brick devices, change system states, and destroy evidence while not guaranteeing removal of compromise. Third-party engagement (D) can help, but it’s not the first operational step—your internal playbook must begin containment now.

(C) correctly focuses on isolating affected devices/segments, limiting lateral movement, and preserving operational stability. In practice, this can include network segmentation, blocking suspicious outbound communications, switching to manual controls where necessary, and capturing logs/telemetry before making changes. This aligns with common containment strategy: stop spread first, then analyze/eradicate, then recover with validated clean states.

ECIH emphasizes that advanced persistent threats require intelligence beyond static indicators. While IOCs are useful, they often change quickly and provide limited context.

Option B is correct because collaboration with industry peers enables sharing of tactics, techniques, and procedures (TTPs), which are more stable and actionable than IOCs. ECIH strongly promotes information sharing communities, ISACs, and trusted peer collaboration to improve situational awareness against APTs.

Options A, C, and D provide partial or outdated insights and lack operational depth.

Therefore, peer collaboration focused on attacker behavior is the most effective approach.