GCIH Incident Response and Cyber Investigation Practice Question
An organization is responding to an Advanced Persistent Threat (APT). During the 'Eradication' phase, why is it critical to go beyond just removing identified malware?
⚠ Common exam trap
Candidates often believe that deleting the primary malware is sufficient for remediation, ignoring that APTs prioritize persistence and will likely have multiple hidden backdoors ready for re-entry.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Because malware is often just a dropper for a secondary, more complex backdoor.
APT actors are methodical and typically establish multiple persistence mechanisms and backdoors to ensure continued access. If a responder only removes the single piece of malware they found, the attacker can easily pivot back into the network. Eradication must involve comprehensive cleaning, including resetting compromised credentials, closing open vulnerabilities, and auditing the environment to ensure no hidden persistence points remain.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Because malware is often just a dropper for a secondary, more complex backdoor.
Why this is correct
APT actors use multiple persistence points to guarantee they can regain access if their primary tool is discovered. A thorough eradication process involves identifying and removing all these secondary backdoors and persistence mechanisms; otherwise, the attacker will simply leverage their secondary access to re-infect the system.
- ✗
Because antivirus signatures are always outdated and will miss the actual threat.
Why it's wrong here
While it is true that signatures may be outdated, this is not the reason why eradication must be comprehensive. Even with perfect antivirus, an APT actor may have established persistence through non-malware means, such as creating new privileged user accounts or modifying SSH authorized_keys files.
- ✗
Because the attacker will likely sue the organization if any artifacts remain.
Why it's wrong here
The primary concern in incident response is the security of the organization, not the threat of litigation from the adversary. Eradication is focused on preventing further unauthorized access, data exfiltration, or damage, and legal considerations in this context usually involve regulatory reporting, not lawsuits from attackers.
- ✗
Because the cleanup process must generate new forensic evidence for police.
Why it's wrong here
Eradication is an operational phase, not a forensic collection phase. While documentation is important, the goal is to secure the network. If anything, the act of cleaning up can destroy evidence, so the team must ensure forensic preservation is complete before starting the eradication process.
About these practice questions
This GCIH question is part of Courseiva's 322-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official GIAC exam blueprint
This GCIH practice question is part of Courseiva's free GIAC certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the GCIH exam.