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| Section | Objectives |
|---|---|
| Security Operations and SOC Fundamentals | - SOC operations principles
|
| Incident Detection and Response | - Incident handling process
|
| Threat Intelligence and Cyber Threat Analysis | - Attack techniques and frameworks
|
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질문 # 101
What is the correct sequence of SOC Workflow?
정답：D
설명：
* Collect: The first step involves collecting data from various sources. This data could be logs, alerts, or other relevant information.
* Ingest: The collected data is then ingested into the SOC's systems for processing. This typically involves parsing and normalizing the data to make it usable for analysis.
* Validate: Once ingested, the data must be validated to ensure its integrity and relevance. This step helps in filtering out false positives and focusing on genuine security events.
* Report: After validation, the relevant findings are compiled into reports. These reports may be used internally within the SOC or shared with other stakeholders.
* Respond: Based on the reports, the SOC team responds to the identified incidents. This response could involve mitigating threats, patching vulnerabilities, or other remediation actions.
* Document: Finally, all actions and findings are thoroughly documented. This documentation is crucial for audit trails, compliance, and improving future SOC operations.
References: The sequence provided is aligned with the SOC operations as described in EC-Council's Certified SOC Analyst (CSA) training and certification program, which covers the fundamentals of SOC operations, including the workflow of SOC analysts123.
질문 # 102
In a large corporation, the HR department receives an urgent email from someone impersonating a high-level executive, requesting immediate transfer of sensitive employee data. The email includes an official-looking document and a phone number for verification. Feeling pressured, the HR manager calls the number and
"confirms" the request, then transfers the data. Investigation later confirms the email was fraudulent and the executive had no knowledge of the request. What type of attack did the HR department face?
정답：B
설명：
This is a social engineering attack because the adversary manipulated human trust and urgency to induce an unauthorized action: the transfer of sensitive employee data. The attacker used impersonation, authority pressure (executive pretext), and a controlled "verification" channel (the attacker's phone number) to make the request appear legitimate. These are hallmark social engineering techniques, and in many organizations this is categorized under business email compromise (BEC) or executive impersonation fraud. Credential theft is not the primary outcome described; the attacker did not need passwords if they could convince HR to release data directly. Web-based intrusion and application exploit refer to technical exploitation of systems, which is not indicated. From a SOC response perspective, handling social engineering incidents includes immediate containment (stop further transfers, notify legal/HR, preserve email evidence), scoping who else received similar requests, and implementing process controls: out-of-band verification using known trusted channels, call-back procedures, dual approval for sensitive requests, and training to recognize urgency-based manipulation. Therefore, "Social engineering attack" is the correct classification.
질문 # 103
DNS logs in the SIEM show an internal host sending many DNS queries with long, encoded subdomains to an external domain. The queries predominantly use TXT records and occur during off-business hours. The external domain is newly registered and has no known business association. Which option best explains this behavior?
정답：C
설명：
The described pattern is highly consistent with DNS tunneling used for command-and-control or data exfiltration. Long, encoded subdomains are commonly used to embed data into DNS queries because DNS labels can carry arbitrary text that can be base32/base64/hex encoded. TXT records are frequently abused in tunneling because they can return larger payloads and are flexible for exchanging data between malware and an external resolver or authoritative DNS infrastructure controlled by an attacker. The fact that this occurs off- hours and targets a newly registered domain with no business relationship increases suspicion and reduces the likelihood of legitimate use. DNS cache poisoning attempts would typically show anomalies in resolver behavior, unexpected DNS responses, or mismatched records, not a high volume of encoded outbound queries from a single internal host. Rogue DNS servers would present as internal hosts acting as resolvers or responding to many DNS queries, not sending encoded TXT queries outward. Legitimate record validation might involve standard query types (A/AAAA/CNAME) and normal domain names, not long encoded subdomains. For SOC triage, the next steps would include identifying the originating process/host, blocking the domain, capturing related network flows, and scoping for other hosts with similar DNS patterns.
질문 # 104
The SOC team is tasked with enhancing the security of an organization's network infrastructure. The organization's public-facing web servers, which handle customer transactions, need to be isolated from the internal private network containing sensitive employee data and proprietary systems. The goal is to create a buffer zone that limits exposure of internal systems if the web servers are compromised during a cyberattack, such as a DDoS or SQL injection attempt. As a SOC analyst, which network architecture component would you recommend implementing to establish this isolated region?
정답：D
설명：
A DMZ is the standard architecture component used to place internet-facing services (web, mail relays, reverse proxies) into a separate, controlled network segment that sits between the untrusted internet and the trusted internal network. From a SOC perspective, the DMZ reduces the impact of compromise by limiting lateral movement opportunities. Even if a web server is exploited (SQL injection, remote code execution, credential theft), the attacker is confined to a segment with strict, minimal access rules into internal systems.
This is achieved by enforcing tightly scoped inbound and outbound traffic policies at the DMZ boundaries, typically allowing only necessary ports and explicitly approved flows (for example, web tier to app tier on a specific port, with no direct route to employee data networks). A firewall is a control that enforces policy, but the "isolated region/buffer zone" concept is specifically the DMZ. IDS and honeypots are detection/deception controls; they do not provide the segmentation boundary required to isolate public-facing systems from sensitive internal networks.
질문 # 105
An organization wants to implement a SIEM deployment architecture. However, they have the capability to do only log collection and the rest of the SIEM functions must be managed by an MSSP.
Which SIEM deployment architecture will the organization adopt?
정답：B
질문 # 106
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