2024年最新のお手軽に合格させるCS0-003試験にはこちらが提供する問題集PDFテストエンジン
CS0-003のPDFで合格させるスゴ問題集でCS0-003最新のリアル試験問題
CompTIA CS0-003 認定試験の出題範囲：
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質問 # 32
A cybersecurity team has witnessed numerous vulnerability events recently that have affected operating systems. The team decides to implement host-based IPS, firewalls, and two-factor authentication. Which of the following does this most likely describe?
- A. Continuous authorization
- B. System hardening
- C. Secure access service edge
- D. Hybrid network architecture
正解：B
解説：
The correct answer is A. System hardening.
System hardening is the process of securing a system by reducing its attack surface, applying patches and updates, configuring security settings, and implementing security controls. System hardening can help prevent or mitigate vulnerability events that may affect operating systems. Host-based IPS, firewalls, and two-factor authentication are examples of security controls that can be applied to harden a system1.
The other options are not the best descriptions of the scenario. A hybrid network architecture (B) is a network design that combines on-premises and cloud-based resources, which may or may not involve system hardening. Continuous authorization is a security approach that monitors and validates the security posture of a system on an ongoing basis, which is different from system hardening. Secure access service edge (D) is a network architecture that delivers cloud-based security services to remote users and devices, which is also different from system hardening.
質問 # 33
A security analyst at a company called ACME Commercial notices there is outbound traffic to a host IP that resolves to https://offce365password.acme.co. The site's standard VPN logon page is www.acme.com/logon. Which of the following is most likely true?
- A. A new VPN gateway has been deployed
- B. The security operations center is performing a routine password audit.
- C. A social engineering attack is underway
- D. This is a normal password change URL.
正解：C
解説：
A social engineering attack is underway is the most likely explanation for the outbound traffic to a host IP that resolves to https://offce365password.acme.co, while the site's standard VPN logon page is www.acme.com/logon. A social engineering attack is a technique that exploits human psychology and behavior to manipulate people into performing actions or divulging information that benefit the attackers. A common type of social engineering attack is phishing, which involves sending fraudulent emails or other messages that appear to come from a legitimate source, such as a company or a colleague, and lure the recipients into clicking on malicious links or attachments, or entering their credentials or other sensitive information on fake websites. In this case, the attackers may have registered a domain name that looks similar to the company's domain name, but with a typo (offce365 instead of office365), and set up a fake website that mimics the company's VPN logon page. The attackers may have also sent phishing emails to the company's employees, asking them to reset their passwords or log in to their VPN accounts using the malicious link. The security analyst should investigate the source and content of the phishing emails, and alert the employees not to click on any suspicious links or enter their credentials on any untrusted websites. Official Reference:
https://partners.comptia.org/docs/default-source/resources/comptia-cysa-cs0-002-exam-objectives
https://www.comptia.org/certifications/cybersecurity-analyst
https://www.comptia.org/blog/the-new-comptia-cybersecurity-analyst-your-questions-answered
質問 # 34
A systems administrator receives reports of an internet-accessible Linux server that is running very sluggishly.
The administrator examines the server, sees a high amount of memory utilization, and suspects a DoS attack related to half-open TCP sessions consuming memory. Which of the following tools would best help to prove whether this server was experiencing this behavior?
- A. TCPDump
- B. Nmap
- C. SIEM
- D. EDR
正解：A
解説：
TCPDump is the best tool to prove whether the server was experiencing a DoS attack related to half-open TCP sessions consuming memory. TCPDump is a command-line tool that can capture and analyze network traffic, such as TCP, UDP, and ICMP packets. TCPDump can help the administrator to identify the source and destination of the traffic, the TCP flags and sequence numbers, the packet size and frequency, and other information that can indicate a DoS attack. A DoS attack related to half-open TCP sessions is also known as a SYN flood attack, which is a type of volumetric attack that aims to exhaust the network bandwidth or resources of the target server by sending a large amount of TCP SYN requests and ignoring the TCP SYN-ACK responses. This creates a backlog of half-open connections on the server, which consume memory and CPU resources, and prevent legitimate connections from being established12. TCPDump can help the administrator to detect a SYN flood attack by looking for a high number of TCP SYN packets with different source IP addresses, a low number of TCP SYN-ACK packets, and a very low number of TCP ACK packets34. References: SYN flood DDoS attack | Cloudflare, What is a SYN flood attack and how to prevent it? | NETSCOUT, TCPDump - A Powerful Tool for Network Analysis and Security, How to Detect a SYN Flood Attack with TCPDump
質問 # 35
A systems administrator notices unfamiliar directory names on a production server. The administrator reviews the directory listings and files, and then concludes the server has been compromised. Which of the following steps should the administrator take next?
- A. Review the lessons learned for the best approach.
- B. Determine when the access started.
- C. Follow the company's incident response plan.
- D. Inform the internal incident response team.
正解：C
解説：
Explanation
An incident response plan is a set of predefined procedures and guidelines that an organization follows when faced with a security breach or attack. An incident response plan helps to ensure that the organization can quickly and effectively contain, analyze, eradicate, and recover from the incident, as well as prevent or minimize the damage and impact to the business operations, reputation, and customers. An incident response plan also defines the roles and responsibilities of the incident response team, the communication channels and protocols, the escalation and reporting procedures, and the tools and resources available for the incident response.
By following the company's incident response plan, the administrator can ensure that they are following the best practices and standards for handling a security incident, and that they are coordinating and collaborating with the relevant stakeholders and authorities. Following the company's incident response plan can also help to avoid or reduce any legal, regulatory, or contractual liabilities or penalties that may arise from the incident.
The other options are not as effective or appropriate as following the company's incident response plan.
Informing the internal incident response team (A) is a good step, but it should be done according to the company's incident response plan, which may specify who, when, how, and what to report. Reviewing the lessons learned for the best approach is a good step, but it should be done after the incident has been resolved and closed, not during the active response phase. Determining when the access started (D) is a good step, but it should be done as part of the analysis phase of the incident response plan, not before following the plan.
質問 # 36
Which of the following is a reason why proper handling and reporting of existing evidence are important for the investigation and reporting phases of an incident response?
- A. TO ensure the report is legally acceptable in case it needs to be presented in court
- B. To present a lessons-learned analysis for the incident response team
- C. To prevent the possible loss of a data source for further root cause analysis
- D. To ensure the evidence can be used in a postmortem analysis
正解：A
解説：
The correct answer is A. To ensure the report is legally acceptable in case it needs to be presented in court.
Proper handling and reporting of existing evidence are important for the investigation and reporting phases of an incident response because they ensure the integrity, authenticity, and admissibility of the evidence in case it needs to be presented in court. Evidence that is mishandled, tampered with, or poorly documented may not be accepted by the court or may be challenged by the opposing party. Therefore, incident responders should follow the best practices and standards for evidence collection, preservation, analysis, and reporting1.
The other options are not reasons why proper handling and reporting of existing evidence are important for the investigation and reporting phases of an incident response. They are rather outcomes or benefits of conducting a thorough and effective incident response process. A lessons-learned analysis (B) is a way to identify the strengths and weaknesses of the incident response team and improve their performance for future incidents. A postmortem analysis is a way to determine the root cause, impact, and timeline of the incident and provide recommendations for remediation and prevention. A root cause analysis (D) is a way to identify the underlying factors that led to the incident and address them accordingly.
質問 # 37
Which of the following is a reason why proper handling and reporting of existing evidence are important for the investigation and reporting phases of an incident response?
- A. TO ensure the report is legally acceptable in case it needs to be presented in court
- B. To present a lessons-learned analysis for the incident response team
- C. To prevent the possible loss of a data source for further root cause analysis
- D. To ensure the evidence can be used in a postmortem analysis
正解：A
解説：
Explanation
The correct answer is A. To ensure the report is legally acceptable in case it needs to be presented in court.
Proper handling and reporting of existing evidence are important for the investigation and reporting phases of an incident response because they ensure the integrity, authenticity, and admissibility of the evidence in case it needs to be presented in court. Evidence that is mishandled, tampered with, or poorly documented may not be accepted by the court or may be challenged by the opposing party. Therefore, incident responders should follow the best practices and standards for evidence collection, preservation, analysis, and reporting1.
The other options are not reasons why proper handling and reporting of existing evidence are important for the investigation and reporting phases of an incident response. They are rather outcomes or benefits of conducting a thorough and effective incident response process. A lessons-learned analysis (B) is a way to identify the strengths and weaknesses of the incident response team and improve their performance for future incidents. A postmortem analysis is a way to determine the root cause, impact, and timeline of the incident and provide recommendations for remediation and prevention. A root cause analysis (D) is a way to identify the underlying factors that led to the incident and address them accordingly.
質問 # 38
A threat hunter seeks to identify new persistence mechanisms installed in an organization's environment. In collecting scheduled tasks from all enterprise workstations, the following host details are aggregated:
Which of the following actions should the hunter perform first based on the details above?
- A. Change the account that runs the -caskhw. exe scheduled task
- B. Acquire a copy of taskhw.exe from the impacted host
- C. Perform a public search for malware reports on taskhw.exe.
- D. Scan the enterprise to identify other systems with taskhw.exe present
正解：C
解説：
The first step should be to perform a public search for malware reports on taskhw.exe, as this file is suspicious for several reasons: it is located in a non-standard path, it has a high CPU usage, it is signed by an unknown entity, and it is only present on one host. A public search can help to determine if this file is a known malware or a legitimate program. If it is malware, the hunter can then take appropriate actions to remove it and prevent further damage. The other options are either premature or ineffective, as they do not provide enough information to assess the threat level of taskhw.exe. References: Cybersecurity Analyst+ - CompTIA, taskhw.exe Windows process - What is it? - file.net, Taskhostw.exe - What Is Taskhostw.exe & Is It Malware? - MalwareTips Forums
質問 # 39
An incident response team finished responding to a significant security incident. The management team has asked the lead analyst to provide an after-action report that includes lessons learned. Which of the following is the most likely reason to include lessons learned?
- A. To highlight the notable practices of the organization's incident response team
- B. To hold other departments accountable
- C. To identify areas of improvement in the incident response process
- D. To satisfy regulatory requirements for incident reporting
正解：C
解説：
The most likely reason to include lessons learned in an after-action report is to identify areas of improvement in the incident response process. The lessons learned process is a way of reviewing and evaluating the incident response activities and outcomes, as well as identifying and documenting any strengths, weaknesses, gaps, or best practices. Identifying areas of improvement in the incident response process can help enhance the security posture, readiness, or capability of the organization for future incidents, as well as provide feedback or recommendations on how to address any issues or challenges.
質問 # 40
A technician is analyzing output from a popular network mapping tool for a PCI audit:
Which of the following best describes the output?
- A. The host is running excessive cipher suites.
- B. The host is not up or responding.
- C. The Secure Shell port on this host is closed
- D. The host is allowing insecure cipher suites.
正解：D
解説：
The output shows the result of running the ssl-enum-ciphers script with Nmap, which is a tool that can scan web servers for supported SSL/TLS cipher suites. Cipher suites are combinations of cryptographic algorithms that are used to establish secure communication between a client and a server. The output shows the cipher suites that are supported by the server, along with a letter grade (A through F) indicating the strength of the connection. The output also shows the least strength, which is the strength of the weakest cipher offered by the server. In this case, the least strength is F, which means that the server is allowing insecure cipher suites that are vulnerable to attacks or have been deprecated. For example, the output shows that the server supports SSLv3, which is an outdated and insecure protocol that is susceptible to the POODLE attack. The output also shows that the server supports RC4, which is a weak and broken stream cipher that should not be used.
Therefore, the best description of the output is that the host is allowing insecure cipher suites. The other descriptions are not accurate, as they do not reflect what the output shows. The host is not up or responding is incorrect, as the output clearly shows that the host is up and responding to the scan. The host is running excessive cipher suites is incorrect, as the output does not indicate how many cipher suites the host is running, only which ones it supports. The Secure Shell port on this host is closed is incorrect, as the output does not show anything about port 22, which is the default port for Secure Shell (SSH). The output only shows information about port 443, which is the default port for HTTPS.
質問 # 41
A security program was able to achieve a 30% improvement in MTTR by integrating security controls into a SIEM. The analyst no longer had to jump between tools. Which of the following best describes what the security program did?
- A. Single pane of glass
- B. Threat feed combination
- C. Data enrichment
- D. Security control plane
正解：A
解説：
A single pane of glass is a term that describes a unified view or interface that integrates multiple tools or data sources into one dashboard or console. A single pane of glass can help improve security operations by providing visibility, correlation, analysis, and alerting capabilities across various security controls and systems. A single pane of glass can also help reduce complexity, improve efficiency, and enhance decision making for security analysts. In this case, a security program was able to achieve a 30% improvement in MTTR by integrating security controls into a SIEM, which provides a single pane of glass for security operations. Official References:
https://www.eccouncil.org/cybersecurity-exchange/threat-intelligence/cyber-kill-chain-seven-steps-cyberattack
質問 # 42
A small company does no! have enough staff to effectively segregate duties to prevent error and fraud in payroll management. The Chief Information Security Officer (CISO) decides to maintain and review logs and audit trails to mitigate risk. Which of the following did the CISO implement?
- A. Administrative controls
- B. Compensating controls
- C. Operational controls
- D. Corrective controls
正解：B
解説：
Compensating controls are alternative controls that provide a similar level of protection as the original controls, but are used when the original controls are not feasible or cost-effective. In this case, the CISO implemented compensating controls by reviewing logs and audit trails to mitigate the risk of error and fraud in payroll management, since segregating duties was not possible due to the small staff size
質問 # 43
A security analyst performs a weekly vulnerability scan on a network that has 240 devices and receives a report with 2.450 pages. Which of the following would most likely decrease the number of false positives?
- A. Credentialed scanning
- B. A known-environment assessment
- C. Penetration testing
- D. Manual validation
正解：A
解説：
Credentialed scanning is a method of vulnerability scanning that uses valid user credentials to access the target systems and perform a more thorough and accurate assessment of their security posture. Credentialed scanning can help to reduce the number of false positives by allowing the scanner to access more information and resources on the systems, such as configuration files, registry keys, installed software, patches, and permissions .
質問 # 44
A vulnerability management team is unable to patch all vulnerabilities found during their weekly scans. Using the third-party scoring system described below, the team patches the most urgent vulnerabilities:
Additionally, the vulnerability management team feels that the metrics Smear and Channing are less important than the others, so these will be lower in priority. Which of the following vulnerabilities should be patched first, given the above third-party scoring system?
- A. ENameless:
Cobain: Yes
Grohl: No
Novo: Yes
Smear: No
Channing: No - B. TSpirit:
Cobain: Yes
Grohl: Yes
Novo: Yes
Smear: No
Channing: No - C. InLoud:
Cobain: Yes
Grohl: No
Novo: Yes
Smear: Yes
Channing: No - D. PBleach:
Cobain: Yes
Grohl: No
Novo: No
Smear: No
Channing: Yes
正解：B
解説：
The vulnerability that should be patched first, given the above third-party scoring system, is:
TSpirit: Cobain: Yes Grohl: Yes Novo: Yes Smear: No Channing: No
This vulnerability has three out of five metrics marked as Yes, which indicates a high severity level. The metrics Cobain, Grohl, and Novo are more important than Smear and Channing, according to the vulnerability management team. Therefore, this vulnerability poses a greater risk than the other vulnerabilities and should be patched first.
質問 # 45
A security analyst observed the following activity from a privileged account:
. Accessing emails and sensitive information
. Audit logs being modified
. Abnormal log-in times
Which of the following best describes the observed activity?
- A. Insider attack
- B. Unauthorized privileges
- C. Rogue devices on the network
- D. Irregular peer-to-peer communication
正解：A
解説：
The observed activity from a privileged account indicates an insider attack, which is when a trusted user or employee misuses their access rights to compromise the security of the organization. Accessing emails and sensitive information, modifying audit logs, and logging in at abnormal times are all signs of malicious behavior by a privileged user who may be trying to steal, tamper, or destroy data, or cover their tracks. An insider attack can cause significant damage to the organization's reputation, operations, and compliance12. Reference: The Privileged Identity Playbook Guides Management of Privileged User Accounts, How to Track Privileged Users' Activities in Active Directory
質問 # 46
A cybersecurity analyst is reviewing SIEM logs and observes consistent requests originating from an internal host to a blocklisted external server. Which of the following best describes the activity that is taking place?
- A. Scanning
- B. Rogue device
- C. Beaconing
- D. Data exfiltration
正解：C
解説：
Beaconing is the best term to describe the activity that is taking place, as it refers to the periodic communication between an infected host and a blocklisted external server. Beaconing is a common technique used by malware to establish a connection with a command-and-control (C2) server, which can provide instructions, updates, or exfiltration capabilities to the malware. Beaconing can vary in frequency, duration, and payload, depending on the type and sophistication of the malware. The other terms are not as accurate as beaconing, as they describe different aspects of malicious activity. Data exfiltration is the unauthorized transfer of data from a compromised system to an external destination, such as a C2 server or a cloud storage service. Data exfiltration can be a goal or a consequence of malware infection, but it does not necessarily involve blocklisted servers or consistent requests. Rogue device is a device that is connected to a network without authorization or proper security controls. Rogue devices can pose a security risk, as they can introduce malware, bypass firewalls, or access sensitive data. However, rogue devices are not necessarily infected with malware or communicating with blocklisted servers. Scanning is the process of probing a network or a system for vulnerabilities, open ports, services, or other information. Scanning can be performed by legitimate administrators or malicious actors, depending on the intent and authorization. Scanning does not imply consistent requests or blocklisted servers, as it can target any network or system.
質問 # 47
A security analyst reviews the following extract of a vulnerability scan that was performed against the web server:
Which of the following recommendations should the security analyst provide to harden the web server?
- A. Close port 22.
- B. Remove the version information on http-server-header.
- C. Disable tcp_wrappers.
- D. Delete the /wp-login.php folder.
正解：B
解説：
The vulnerability scan shows that the version information is visible in the http-server-header, which can be exploited by attackers to identify vulnerabilities specific to that version. Removing or obfuscating this information can enhance security.
References: CompTIA CySA+ CS0-003 Certification Study Guide, Chapter 4: Vulnerability Management, page 172; CompTIA CySA+ Study Guide: Exam CS0-003, 3rd Edition, Chapter 5: Vulnerability Management, page 223.
質問 # 48
A security analyst is reviewing the following log entries to identify anomalous activity:
Which of the following attack types is occurring?
- A. Buffer overflow
- B. SQL injection
- C. Directory traversal
- D. Cross-site scripting
正解：C
解説：
A directory traversal attack is a type of web application attack that exploits insufficient input validation or improper configuration to access files or directories that are outside the intended scope of the web server. The log entries given in the question show several requests that contain ".../" sequences in the URL, which indicate an attempt to move up one level in the directory structure. For example, the request "/images/.../.../etc/passwd" tries to access the /etc/passwd file, which contains user account information on Linux systems. If successful, this attack could allow an attacker to read, modify, or execute files on the web server that are not meant to be accessible.
質問 # 49
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