[2025年11月07日] 有効なCS0-003テスト解答とCompTIA CS0-003試験PDF問題を試そう
実際に出るCS0-003試験問題集には正確で更新された問題
質問 # 106
An analyst is trying to capture anomalous traffic from a compromised host. Which of the following are the best tools for achieving this objective? (Select two).
- A. Wireshark
- B. Vulnerability scanner
- C. Nmap
- D. SOAR
- E. SIEM
- F. tcpdump
正解：A、F
解説：
Comprehensive and Detailed Explanation:
To capture and analyze network traffic, the two best tools are:
* tcpdump (Option A) - A command-line packet capture tool used for network traffic analysis.
* Wireshark (Option D) - A GUI-based network packet analysis tool that provides deep inspection capabilities.
* Option B (SIEM) is for log aggregation and does not capture traffic.
* Option C (Vulnerability scanner) identifies weaknesses but does not capture network traffic.
* Option E (Nmap) is used for network discovery and port scanning, not capturing traffic.
* Option F (SOAR) automates security processes but does not capture traffic.
Thus, A (tcpdump) and D (Wireshark) are correct, as they are the best tools for capturing and analyzing anomalous network traffic.
質問 # 107
Which of the following is an advantage of SOAR over SIEM?
- A. SOAR uses more robust encryption protocols.
- B. SOAR can aggregate data from many sources.
- C. SOAR is much less expensive.
- D. SOAR reduces the amount of human intervention required.
正解：D
解説：
When comparing SOAR vs. SIEM, SIEM will only provide the alert. After that, it's up to the administrator to determine the path of an investigation (so, this means in my opinion more human intervation). A SOAR that automates investigation path workflows can significantly cut down on the amount of time required to handle alerts.
質問 # 108
Executives at an organization email sensitive financial information to external business partners when negotiating valuable contracts. To ensure the legal validity of these messages, the cybersecurity team recommends a digital signature be added to emails sent by the executives. Which of the following are the primary goals of this recommendation? (Select two).
- A. Anonymity
- B. Privacy
- C. Non-repudiation
- D. Authorization
- E. Confidentiality
- F. Integrity
正解：C、F
解説：
Digital signatures ensure the integrity and non-repudiation of emails. Integrity ensures that the message has not been altered in transit, as the digital signature would be invalidated if the content were tampered with. Non-repudiation ensures that the sender cannot deny having sent the email, as the digital signature is unique to their identity. These principles are crucial for legal validity, as recommended by CompTIA Security+ standards. Confidentiality (A) and privacy (C) relate to encryption, while authorization (F) and anonymity (D) are unrelated to the primary purpose of digital signatures in this context.
質問 # 109
The architecture team has been given a mandate to reduce the triage time of phishing incidents by 20%. Which of the following solutions will most likely help with this effort?
- A. Implement an EDR tool.
- B. Integrate a SOAR platform.
- C. Increase the budget to the security awareness program.
- D. Install a button in the mail clients to report phishing.
正解：B
解説：
SOAR (Security Orchestration, Automation, and Response) platforms help automate and orchestrate incident response tasks, including phishing triage.
SOAR reduces triage time by automatically:
Parsing phishing emails (checking headers, links, attachments).
Running automated playbooks to check for known malicious indicators.
Escalating real threats while dismissing false positives.
Why Not Other Options?
B (Increase security awareness) → Helps prevent phishing but does NOT reduce triage time.
C (Implement EDR) → EDR is useful for endpoint protection but does NOT specifically reduce phishing triage time.
D (Install a "Report Phishing" button) → Helps report phishing but does NOT automate the triage process.
質問 # 110
A company classifies security groups by risk level. Any group with a high-risk classification requires multiple levels of approval for member or owner changes. Which of the following inhibitors to remediation is the company utilizing?
- A. Organizational governance
- B. Business process interruption
- C. MOU
- D. SLA
正解：A
質問 # 111
You are a penetration tester who is reviewing the system hardening guidelines for a company.
Hardening guidelines indicate the following.
There must be one primary server or service per device.
Only default port should be used
Non- secure protocols should be disabled.
The corporate internet presence should be placed in a protected subnet
Instructions :
Using the available tools, discover devices on the corporate network and the services running on these devices.
You must determine
ip address of each device
The primary server or service each device
The protocols that should be disabled based on the hardening guidelines
正解：
解説：
質問 # 112
A security administrator needs to import Pll data records from the production environment to the test environment for testing purposes. Which of the following would best protect data confidentiality?
- A. Hashing
- B. Watermarking
- C. Encoding
- D. Data masking
正解：D
解説：
Data masking is a technique that replaces sensitive data with fictitious or anonymized data, while preserving the original format and structure of the data. This way, the data can be used for testing purposes without revealing the actual Pll information. Data masking is one of the best practices for data analysis of confidential data1. References: CompTIA CySA+ CS0-003 Certification Study Guide, page 343; Best Practices for Data Analysis of Confidential Data
質問 # 113
An employee is suspected of misusing a company-issued laptop. The employee has been suspended pending an investigation by human resources. Which of the following is the best step to preserve evidence?
- A. Place a legal hold on the device and the user's network share.
- B. Make a forensic image of the device and create a SRA-I hash.
- C. Disable the user's network account and access to web resources
- D. Make a copy of the files as a backup on the server.
正解：B
解説：
Making a forensic image of the device and creating a SRA-I hash is the best step to preserve evidence, as it creates an exact copy of the device's data and verifies its integrity. A forensic image is a bit-by-bit copy of the device's storage media, which preserves all the information on the device, including deleted or hidden files. A SRA-I hash is a cryptographic value that is calculated from the forensic image, which can be used to prove that the image has not been altered or tampered with. The other options are not as effective as making a forensic image and creating a SRA-I hash, as they may not capture all the relevant data, or they may not provide sufficient verification of the evidence's authenticity. Official Reference:
https://www.sans.org/blog/forensics-101-acquiring-an-image-with-ftk-imager/
https://swailescomputerforensics.com/digital-forensics-imaging-hash-value/
質問 # 114
Which of the following responsibilities does the legal team have during an incident management event? (Choose two.)
- A. Conduct computer and network damage assessments for insurance.
- B. Verify that all security personnel have the appropriate clearances.
- C. Advise the Incident response team on matters related to regulatory reporting.
- D. Coordinate additional or temporary staffing for recovery efforts.
- E. Ensure all system security devices and procedures are in place.
- F. Review and approve new contracts acquired as a result of an event.
正解：C、F
解説：
During an incident, the legal team plays a crucial role in handling regulatory compliance and reviewing legal implications, such as contractual obligations and reporting requirements.
質問 # 115
An organization discovered a data breach that resulted in Pll being released to the public. During the lessons learned review, the panel identified discrepancies regarding who was responsible for external reporting, as well as the timing requirements. Which of the following actions would best address the reporting issue?
- A. Designating specific roles and responsibilities within the security team and stakeholders to streamline tasks
- B. Researching federal laws, regulatory compliance requirements, and organizational policies to document specific reporting SLAs
- C. Creating a playbook denoting specific SLAs and containment actions per incident type
- D. Defining which security incidents require external notifications and incident reporting in addition to internal stakeholders
正解：B
解説：
Researching federal laws, regulatory compliance requirements, and organizational policies to document specific reporting SLAs is the best action to address the reporting issue. Reporting SLAs are service level agreements that specify the time frame and the format for notifying the relevant authorities and the affected individuals of a data breach. Reporting SLAs may vary depending on the type and severity of the breach, the type and location of the data, the industry and jurisdiction of the organization, and the internal policies of the organization. By researching and documenting the reporting SLAs for different scenarios, the organization can ensure that it complies with the legal and ethical obligations of data breach notification, and avoid any penalties, fines, or lawsuits that may result from failing to report a breach in a timely and appropriate manner12. References: When and how to report a breach: Data breach reporting best practices, Incident and Breach Management
質問 # 116
An analyst is remediating items associated with a recent incident. The analyst has isolated the vulnerability and is actively removing it from the system. Which of the following steps of the process does this describe?
- A. Eradication
- B. Preparation
- C. Containment
- D. Recovery
正解：A
解説：
Explanation
Eradication is a step in the incident response process that involves removing any traces or remnants of the incident from the affected systems or networks, such as malware, backdoors, compromised accounts, or malicious files. Eradication also involves restoring the systems or networks to their normal or secure state, as well as verifying that the incident is completely eliminated and cannot recur. In this case, the analyst is remediating items associated with a recent incident by isolating the vulnerability and actively removing it from the system. This describes the eradication step of the incident response process.
質問 # 117
New employees in an organization have been consistently plugging in personal webcams despite the company policy prohibiting use of personal devices. The SOC manager discovers that new employees are not aware of the company policy. Which of the following will the SOC manager most likely recommend to help ensure new employees are accountable for following the company policy?
- A. All new employees must sign a user agreement to acknowledge the company security policy
- B. All new employees must take a test about the company security policy during the onboardmg process
- C. Supervisors must get verbal confirmation from new employees indicating they have read the user agreement
- D. Human resources must email a copy of a user agreement to all new employees
正解：A
解説：
The best action that the SOC manager can recommend to help ensure new employees are accountable for following the company policy is to require all new employees to sign a user agreement to acknowledge the company security policy. A user agreement is a document that defines the rights and responsibilities of the users regarding the use of the company's systems, networks, or resources, as well as the consequences of violating the company's security policy.
Signing a user agreement can help ensure new employees are aware of and agree to comply with the company security policy, as well as hold them accountable for any breaches or incidents caused by their actions or inactions.
質問 # 118
During routine monitoring a security analyst identified the following enterprise network traffic:
Packet capture output:
Which of the following BEST describes what the security analyst observed?
- A. 66.187.224.210 set up a DNS hijack with 192.168.12.21.
- B. 192.168.12.21 made a TCP connection to 66.187.224.210
- C. 192.168.12.21 made a TCP connection to 209.132.177.50
- D. 209.132.177.50 set up a TCP reset attack to 192.168.12.21
正解：C
質問 # 119
A security analyst receives an alert for suspicious activity on a company laptop An excerpt of the log is shown below:
Which of the following has most likely occurred?
- A. A credential-stealing website was visited.
- B. A web browser vulnerability was exploited.
- C. A phishing link in an email was clicked
- D. An Office document with a malicious macro was opened.
正解：D
解説：
An Office document with a malicious macro was opened is the most likely explanation for the suspicious activity on the company laptop, as it reflects the common technique of using macros to execute PowerShell commands that download and run malware. A macro is a piece of code that can automate tasks or perform actions in an Office document, such as a Word file or an Excel spreadsheet. Macros can be useful and legitimate, but they can also be abused by threat actors to deliver malware or perform malicious actions on the system. A malicious macro can be embedded in an Office document that is sent as an attachment in a phishing email or hosted on a compromised website. When the user opens the document, they may be prompted to enable macros or content, which will trigger the execution of the malicious code. The malicious macro can then use PowerShell, which is a scripting language and command-line shell that is built into Windows, to perform various tasks, such as downloading and running malware from a remote URL, bypassing security controls, or establishing persistence on the system. The log excerpt shows that PowerShell was used to download a string from a URL using the WebClient.DownloadString method, which is a common way to fetch and execute malicious code from the internet. The log also shows that PowerShell was used to invoke an expression (iex) that contains obfuscated code, which is another common way to evade detection and analysis.
The other options are not as likely as an Office document with a malicious macro was opened, as they do not match the evidence in the log excerpt. A credential-stealing website was visited is possible, but it does not explain why PowerShell was used to download and execute code from a URL. A phishing link in an email was clicked is also possible, but it does not explain what happened after the link was clicked or how PowerShell was involved. A web browser vulnerability was exploited is unlikely, as it does not explain why PowerShell was used to download and execute code from a URL.
質問 # 120
The analyst reviews the following endpoint log entry:
Which of the following has occurred?
- A. Registry change
- B. New account introduced
- C. Rename computer
- D. Privilege escalation
正解：B
解説：
The endpoint log entry shows that a new account named "admin" has been created on a Windows system with a local group membership of "Administrators". This indicates that a new account has been introduced on the system with administrative privileges. This could be a sign of malicious activity, such as privilege escalation or backdoor creation, by an attacker who has compromised the system.
質問 # 121
You are a penetration tester who is reviewing the system hardening guidelines for a company. Hardening guidelines indicate the following.
* There must be one primary server or service per device.
* Only default port should be used
* Non- secure protocols should be disabled.
* The corporate internet presence should be placed in a protected subnet Instructions :
* Using the available tools, discover devices on the corporate network and the services running on these devices.
You must determine
* ip address of each device
* The primary server or service each device
* The protocols that should be disabled based on the hardening guidelines
正解：
解説：
see the answer below in explanation:
Explanation:
Answer below images
質問 # 122
A security analyst needs to develop a solution to protect a high-value asset from an exploit like a recent zero- day attack. Which of the following best describes this risk management strategy?
- A. Mitigate
- B. Avoid
- C. Accept
- D. Transfer
正解：A
解説：
Comprehensive Detailed Explanation:The best approach to address the risk of a zero-day attack is mitigation.
Here's an explanation of each option:
* A. Avoid
* Explanation: Avoiding risk would mean discontinuing the use of the asset, which is not feasible for high-value assets that are essential to operations.
* B. Transfer
* Explanation: Transferring risk would involve outsourcing or obtaining insurance, but this does not directly reduce the threat of a zero-day exploit.
* C. Accept
* Explanation: Accepting the risk means acknowledging it without implementing countermeasures, which is not advisable for high-value assets at risk from sophisticated attacks.
* D. Mitigate
* Explanation: Mitigation involves implementing technical or administrative controls to reduce the impact of an attack. For zero-day exploits, this could include installing network-based protections, enhancing monitoring, or applying threat intelligence to detect or contain potential exploit attempts.
References:
* NIST SP 800-30: Guide for Conducting Risk Assessments.
* OWASP Risk Rating Methodology: Techniques for assessing and mitigating security risks.
質問 # 123
A payroll department employee was the target of a phishing attack in which an attacker impersonated a department director and requested that direct deposit information be updated to a new account. Afterward, a deposit was made into the unauthorized account. Which of the following is one of the first actions the incident response team should take when they receive notification of the attack?
- A. Scan the employee's computer with virus and malware tools.
- B. Review the actions taken by the employee and the email related to the event
- C. Assign security awareness training to the employee involved in the incident.
- D. Contact human resources and recommend the termination of the employee.
正解：B
解説：
In case of a phishing attack, it's crucial to review what actions were taken by the employee and analyze the phishing email to understand its nature and impact.References: CompTIA CySA+ Study Guide: Exam CS0-
003, 3rd Edition, Chapter 6, page 246; CompTIA CySA+ CS0-003 Certification Study Guide, Chapter 6, page
255.
質問 # 124
A cybersecurity analyst is participating with the DLP project team to classify the organization's data. Which of the following is the primary purpose for classifying data?
- A. To prioritize IT expenses
- B. To identify regulatory compliance requirements
- C. To facilitate the creation of DLP rules
- D. To establish the value of data to the organization
正解：D
質問 # 125
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CompTIA CS0-003 認定試験の出題範囲：
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CS0-003試験問題集でPDF問題とテストエンジン：https://www.goshiken.com/CompTIA/CS0-003-mondaishu.html
CS0-003問題集で必ず合格させる試験：https://drive.google.com/open?id=14nlli_hie2jrTIoidrBB6wl3H8jxB2Ne