2025年最新のCS0-003実際問題集には試験のコツがあるPDF試験材料
心強いCS0-003のPDF問題集問題
CompTIA CS0-003 認定試験の出題範囲：
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質問 # 278
An organization wants to move non-essential services into a cloud computing environment. The management team has a cost focus and would like to achieve a recovery time objective of 12 hours. Which of the following cloud recovery strategies would work best to attain the desired outcome?
- A. Set up a warm disaster recovery site with the same cloud provider in a different region.
- B. Duplicate all services in another instance and load balance between the instances.
- C. Establish a hot site with active replication to another region within the same cloud provider.
- D. Configure the systems with a cold site at another cloud provider that can be used for failover.
正解：A
解説：
Setting up a warm disaster recovery site with the same cloud provider in a different region can help to achieve a recovery time objective (RTO) of 12 hours while keeping the costs low. A warm disaster recovery site is a partially configured site that has some of the essential hardware and software components ready to be activated in case of a disaster. A warm site can provide faster recovery than a cold site, which has no preconfigured components, but lower costs than a hot site, which has fully configured and replicated components. Using the same cloud provider can help to simplify the migration and synchronization processes, while using a different region can help to avoid regional outages or disasters .
質問 # 279
A cybersecurity analyst is tasked with scanning a web application to understand where the scan will go and whether there are URIs that should be denied access prior to more in-depth scanning.
Which of following best fits the type of scanning activity requested?
- A. Uncredentialed scan
- B. Discovery scan
- C. Credentialed scan
- D. Vulnerability scan
正解：B
質問 # 280
Two employees in the finance department installed a freeware application that contained embedded malware. The network is robustly segmented based on areas of responsibility. These computers had critical sensitive information stored locally that needs to be recovered. The department manager advised all department employees to turn off their computers until the security team could be contacted about the issue. Which of the following is the first step the incident response staff members should take when they arrive?
- A. Identify and remove the software installed on the impacted systems in the department.
- B. Segment the entire department from the network and review each computer offline.
- C. Turn on all systems, scan for infection, and back up data to a USB storage device.
- D. Explain that malware cannot truly be removed and then reimage the devices.
- E. Log on to the impacted systems with an administrator account that has privileges to perform backups.
正解：B
解説：
Segmenting the entire department from the network and reviewing each computer offline is the first step the incident response staff members should take when they arrive. This step can help contain the malware infection and prevent it from spreading to other systems or networks.
Reviewing each computer offline can help identify the source and scope of the infection, and determine the best course of action for recovery. Turning on all systems, scanning for infection, and backing up data to a USB storage device is a risky step, as it can activate the malware and cause further damage or data loss. It can also compromise the USB storage device and any other system that connects to it. Identifying and removing the software installed on the impacted systems in the department is a possible step, but it should be done after segmenting the department from the network and reviewing each computer offline. Explaining that malware cannot truly be removed and then reimaging the devices is a drastic step, as it can result in data loss and downtime. It should be done only as a last resort, and after backing up the data and verifying its integrity. Logging on to the impacted systems with an administrator account that has privileges to perform backups is a dangerous step, as it can expose the administrator credentials and privileges to the malware, and allow it to escalate its access and capabilities.
質問 # 281
Exploit code for a recently disclosed critical software vulnerability was publicly available (or download for several days before being removed. Which of the following CVSS v.3.1 temporal metrics was most impacted by this exposure?
- A. Availability
- B. Remediation level
- C. Exploit code maturity
- D. Report confidence
正解：C
解説：
Exploit code maturity in the CVSS v.3.1 temporal metrics refers to the reliability and availability of exploit code for a vulnerability. Public availability of exploit code increases the exploit code maturity score.
The availability of exploit code affects the 'Exploit Code Maturity' metric in CVSS v.3.1. This metric evaluates the level of maturity of the exploit that targets the vulnerability. When exploit code is readily available, it suggests a higher level of maturity, indicating that the exploit is more reliable and easier to use.
質問 # 282
An analyst is conducting monitoring against an authorized team that win perform adversarial techniques. The analyst interacts with the team twice per day to set the stage for the techniques to be used. Which of the following teams is the analyst a member of?
- A. Orange team
- B. Purple team
- C. Blue team
- D. Red team
正解：A
解説：
An orange team is a team that is involved in facilitation and training of other teams in cybersecurity. An orange team assists the yellow team, which is the management or leadership team that oversees the cybersecurity strategy and governance of an organization. An orange team helps the yellow team to understand the cybersecurity risks and challenges, as well as the roles and responsibilities of other teams, such as the red, blue, and purple teams. In this scenario, the analyst is conducting monitoring against an authorized team that will perform adversarial techniques. This means that the analyst is observing and evaluating the performance of another team that is simulating real-world attacks against the organization's systems or networks. This could be either a red team or a purple team, depending on whether they are working independently or collaboratively with the defensive team. The analyst interacts with the team twice per day to set the stage for the techniques to be used. This means that the analyst is providing guidance and feedback to the team on how to conduct their testing and what techniques to use. This could also involve setting up scenarios, objectives, rules of engagement, and success criteria for the testing. This implies that the analyst is facilitating and training the team to improve their skills and capabilities in cybersecurity. Therefore, based on these descriptions, the analyst is a member of an orange team, which is involved in facilitation and training of other teams in cybersecurity.
質問 # 283
A security analyst recently used Arachni to perform a vulnerability assessment of a newly developed web application. The analyst is concerned about the following output:
[+] XSS: In form input 'txtSearch' with action https://localhost/search.aspx
[-] XSS: Analyzing response #1...
[-] XSS: Analyzing response #2...
[-] XSS: Analyzing response #3...
[+] XSS: Response is tainted. Looking for proof of the vulnerability.
Which of the following is the most likely reason for this vulnerability?
- A. The developer set input validation protection on the specific field of search.aspx.
- B. The developer did not implement default protections in the web application build.
- C. The developer did not set proper cross-site request forgery protections.
- D. The developer did not set proper cross-site scripting protections in the header.
正解：D
解説：
The most likely reason for this vulnerability is B. The developer did not set proper cross-site scripting protections in the header. Cross-site scripting (XSS) is a type of web application vulnerability that allows an attacker to inject malicious code into a web page that is viewed by other users. XSS can be used to steal cookies, session tokens, credentials, or other sensitive information, or to perform actions on behalf of the victim1.
One of the common ways to prevent XSS attacks is to set proper HTTP response headers that instruct the browser how to handle the content of the web page. For example, the Content-Type header can specify the MIME type and character encoding of the web page, which can help the browser avoid interpreting data as code. The X-XSS-Protection header can enable or disable the browser's built-in XSS filter, which can block or sanitize suspicious scripts. The Content-Security-Policy header can define a whitelist of sources and directives that control what resources and scripts can be loaded or executed on the web page2.
According to the output of Arachni, a web application security scanner framework3, it detected an XSS vulnerability in the form input 'txtSearch' with action https://localhost/search.aspx. This means that Arachni was able to inject a malicious script into the input field and observe its execution in the response. This indicates that the developer did not set proper cross-site scripting protections in the header of search.aspx, which allowed Arachni to bypass the browser's default security mechanisms and execute arbitrary code on the web page.
質問 # 284
Which of the following responsibilities does the legal team have during an incident management event? (Select two).
- A. Verify that all security personnel have the appropriate clearances.
- B. Review and approve new contracts acquired as a result of an event.
- C. Coordinate additional or temporary staffing for recovery efforts.
- D. Advise the Incident response team on matters related to regulatory reporting.
- E. Conduct computer and network damage assessments for insurance.
- F. Ensure all system security devices and procedures are in place.
正解：B、D
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. Advising on regulatory reporting (Option C) ensures the organization meets legal mandates, while reviewing contracts (Option B) can address new or emergency services needed during the incident. According to CompTIA CySA+ and Security+ guidelines, these legal responsibilities are vital for compliance and risk management. Options related to staffing, damage assessments, and clearances typically fall under operational or HR responsibilities rather than legal purview.
質問 # 285
An employee accessed a website that caused a device to become infected with invasive malware. The incident response analyst has:
* created the initial evidence log.
* disabled the wireless adapter on the device.
* interviewed the employee, who was unable to identify the website that was accessed
* reviewed the web proxy traffic logs.
Which of the following should the analyst do to remediate the infected device?
- A. Install an additional malware scanner that will send email alerts to the analyst.
- B. Delete the user profile and restore data from backup.
- C. Configure the system to use a proxy server for Internet access.
- D. Update the system firmware and reimage the hardware.
正解：D
解説：
Explanation
Updating the system firmware and reimaging the hardware is the best action to perform to remediate the infected device, as it helps to ensure that the device is restored to a clean and secure state and that any traces of malware are removed. Firmware is a type of software that controls the low-level functions of a hardware device, such as a motherboard, hard drive, or network card. Firmware can be updated or flashed to fix bugs, improve performance, or enhance security. Reimaging is a process of erasing and restoring the data on a storage device, such as a hard drive or a solid state drive, using an image file that contains a copy of the operating system, applications, settings, and files. Reimaging can help to recover from system failures, data corruption, or malware infections. Updating the system firmware and reimaging the hardware can help to remediate the infected device by removing any malicious code or configuration changes that may have been made by the malware, as well as restoring any missing or damaged files or settings that may have been affected by the malware. This can help to prevent further damage, data loss, or compromise of the device or the network. The other actions are not as effective or appropriate as updating the system firmware and reimaging the hardware, as they do not address the root cause of the infection or ensure that the device is fully cleaned and secured. Installing an additional malware scanner that will send email alerts to the analyst may help to detect and remove some types of malware, but it may not be able to catch all malware variants or remove them completely. It may also create conflicts or performance issues with other security tools or systems on the device. Configuring the system to use a proxy server for Internet access may help to filter or monitor some types of malicious traffic or requests, but it may not prevent or remove malware that has already infected the device or that uses other methods of communication or propagation. Deleting the user profile and restoring data from backup may help to recover some data or settings that may have been affected by the malware, but it may not remove malware that has infected other parts of the system or that has persisted on the device.
質問 # 286
The following output is from a tcpdump al the edge of the corporate network:
Which of the following best describes the potential security concern?
- A. Payload lengths may be used to overflow buffers enabling code execution.
- B. This traffic exhibits a reconnaissance technique to create network footprints.
- C. Encapsulated traffic may evade security monitoring and defenses
- D. The content of the traffic payload may permit VLAN hopping.
正解：C
解説：
Encapsulated traffic may evade security monitoring and defenses by hiding or obfuscating the actual content or source of the traffic. Encapsulation is a technique that wraps data packets with additional headers or protocols to enable communication across different network types or layers. Encapsulation can be used for legitimate purposes, such as tunneling, VPNs, or NAT, but it can also be used by attackers to bypass security controls or detection mechanisms that are not able to inspect or analyze the encapsulated traffic .
質問 # 287
Which of the following is the most important reason for an incident response team to develop a formal incident declaration?
- A. To require that an incident be reported through the proper channels
- B. To establish the department that is responsible for responding to an incident
- C. To identify and document staff who have the authority to declare an incident
- D. To allow for public disclosure of a security event impacting the organization
正解：C
解説：
The formal incident declaration is crucial to identify and document the staff who have the authority to declare an incident, ensuring that incidents are handled by authorized personnel. Reference: CompTIA CySA+ Study Guide: Exam CS0-003, 3rd Edition, Chapter 5: Incident Response, page 197.
質問 # 288
Which of the following actions would an analyst most likely perform after an incident has been investigated?
- A. Root cause analysis
- B. Risk assessment
- C. Incident response plan
- D. Tabletop exercise
正解：D
解説：
A tabletop exercise is the most likely action that an analyst would perform after an incident has been investigated. A tabletop exercise is a simulation of a potential incident scenario that involves the key stakeholders and decision-makers of the organization. The purpose of a tabletop exercise is to evaluate the effectiveness of the incident response plan, identify the gaps and weaknesses in the plan, and improve the communication and coordination among the incident response team and other parties. A tabletop exercise can help the analyst to learn from the incident investigation, test the assumptions and recommendations made during the investigation, and enhance the preparedness and resilience of the organization for future incidents12. Risk assessment, root cause analysis, and incident response plan are all actions that an analyst would perform before or during an incident investigation, not after. Risk assessment is the process of identifying, analyzing, and evaluating the risks that may affect the organization. Root cause analysis is the method of finding the underlying or fundamental causes of an incident. Incident response plan is the document that defines the roles, responsibilities, procedures, and resources for responding to an incident345.
References: Tabletop Exercises: Six Scenarios to Help Prepare Your Cybersecurity Team, Tabletop Exercises for Incident Response - SANS Institute, Risk Assessment - NIST, Root Cause Analysis - OWASP, Incident Response Plan | Ready.gov
質問 # 289
A security analyst recently joined the team and is trying to determine which scripting language is being used in a production script to determine if it is malicious. Given the following script:
Which of the following scripting languages was used in the script?
- A. Python
- B. Ruby
- C. PowerShel
- D. Shell script
正解：C
解説：
The script uses PowerShell syntax, such as cmdlets, parameters, variables, and comments. PowerShell is a scripting language that can be used to automate tasks and manage systems.
質問 # 290
A recent vulnerability scan resulted in an abnormally large number of critical and high findings that require patching. The SLA requires that the findings be remediated within a specific amount of time. Which of the following is the best approach to ensure all vulnerabilities are patched in accordance with the SLA?
- A. Request an exception and manually patch each system
- B. Integrate an IT service delivery ticketing system to track remediation and closure
- C. Create a compensating control item until the system can be fully patched
- D. Accept the risk and decommission current assets as end of life
正解：B
解説：
Integrating an IT service delivery ticketing system to track remediation and closure is the best approach to ensure all vulnerabilities are patched in accordance with the SLA. A ticketing system is a software tool that helps manage, organize, and track the tasks and workflows related to IT service delivery, such as incident management, problem management, change management, and vulnerability management. A ticketing system can help the security team to prioritize, assign, monitor, and document the remediation of the vulnerabilities, and to ensure that they are completed within the specified time frame and quality standards. A ticketing system can also help the security team to communicate and collaborate with other teams, such as the IT operations team, the development team, and the business stakeholders, and to report on the status and progress of the remediation efforts. Creating a compensating control item, accepting the risk, and requesting an exception are not the best approaches to ensure all vulnerabilities are patched in accordance with the SLA, as they do not address the root cause of the problem, which is the large number of critical and high findings that require patching. These approaches may also introduce more risks or challenges for the security team, such as compliance issues, resource constraints, or business impacts.
質問 # 291
An incident response team receives an alert to start an investigation of an internet outage. The outage is preventing all users in multiple locations from accessing external SaaS resources. The team determines the organization was impacted by a DDoS attack. Which of the following logs should the team review first?
- A. Vulnerability scanner
- B. DNS
- C. Web server
- D. CDN
正解：B
解説：
Explanation
A distributed denial-of-service (DDoS) attack is a type of cyberattack that aims to overwhelm a target's network or server with a large volume of traffic from multiple sources. A common technique for launching a DDoS attack is to compromise DNS servers, which are responsible for resolving domain names into IP addresses. By flooding DNS servers with malicious requests, attackers can disrupt the normal functioning of the internet and prevent users from accessing external SaaS resources. Official References:
https://www.eccouncil.org/cybersecurity-exchange/threat-intelligence/cyber-kill-chain-seven-steps-cyberattack/
質問 # 292
During an incident response procedure, a security analyst acquired the needed evidence from the hard drive of a compromised machine. Which of the following actions should the analyst perform next to ensure the data integrity of the evidence?
- A. Create a chain of custody document.
- B. Generate hashes for each file from the hard drive.
- C. Determine a timeline of events using correct time synchronization.
- D. Keep the cloned hard drive in a safe place.
正解：B
解説：
Generating hashes for each file from the hard drive is the next action that the analyst should perform to ensure the data integrity of the evidence. Hashing is a technique that produces a unique and fixed-length value for a given input, such as a file or a message. Hashing can help to verify the data integrity of the evidence by comparing the hash values of the original and copied files. If the hash values match, then the evidence has not been altered or corrupted. If the hash values differ, then the evidence may have been tampered with or damaged .
質問 # 293
A security analyst is reviewing the following alert that was triggered by FIM on a critical system:
Which of the following best describes the suspicious activity that is occurring?
- A. The host firewall on 192.168.1.10 was disabled.
- B. A new program has been set to execute on system start
- C. A fake antivirus program was installed by the user.
- D. A network drive was added to allow exfiltration of data
正解：B
解説：
A new program has been set to execute on system start is the most likely cause of the suspicious activity that is occurring, as it indicates that the malware has modified the registry keys of the system to ensure its persistence. File Integrity Monitoring (FIM) is a tool that monitors changes to files and registry keys on a system and alerts the security analyst of any unauthorized or malicious modifications. The alert triggered by FIM shows that the malware has created a new registry key under the Run subkey, which is used to launch programs automatically when the system starts. The new registry key points to a file named "update.exe" in the Temp folder, which is likely a malicious executable disguised as a legitimate update file. Official References:
https://www.comptia.org/blog/the-new-comptia-cybersecurity-analyst-your-questions-answered
https://partners.comptia.org/docs/default-source/resources/comptia-cysa-cs0-002-exam-objectives
https://www.comptia.org/training/books/cysa-cs0-002-study-guide
質問 # 294
A security administrator has found indications of dictionary attacks against the company's external-facing portal. Which of the following should be implemented to best mitigate the password attacks?
- A. Multifactor authentication
- B. Web application firewall
- C. Password complexity
- D. Lockout policy
正解：D
解説：
Dictionary attacks involve an attacker attempting to guess passwords by using a list of common passwords.
Implementing a lockout policy is effective because it limits the number of login attempts, thereby hindering the attacker's ability to repeatedly attempt different passwords. Lockout policies are standard in cybersecurity practices to prevent brute-force and dictionary attacks by temporarily disabling an account after a certain number of failed login attempts. According to CompTIA Security+ standards, password complexity (option B) and multifactor authentication (option A) are helpful but are not as immediately effective in directly preventing repeated attempts as a lockout policy.
質問 # 295
A company's legal department is concerned that its incident response plan does not cover the countless ways security incidents can occur. The department has asked a security analyst to help tailor the response plan to provide broad coverage for many situations. Which of the following is the best way to achieve this goal?
- A. Focus on incidents that may require law enforcement support.
- B. Focus on incidents that have a high chance of reputation harm.
- C. Focus on common attack vectors first.
- D. Focus on incidents that affect critical systems.
正解：D
解説：
An incident response plan should cover the most important and likely scenarios that could compromise the security and operations of an organization. According to various sources of best practices123, an incident response plan should start by conducting a risk assessment to identify potential threats and vulnerabilities, and prioritize the critical systems that need to be protected and restored in case of an incident. Focusing on incidents that affect critical systems ensures that the incident response plan covers the most severe and impactful situations that could harm the organization's mission, reputation, or legal obligations.
質問 # 296
The analyst reviews the following endpoint log entry:
Which of the following has occurred?
- A. Privilege escalation
- B. Rename computer
- C. New account introduced
- D. Registry change
正解：C
解説：
Explanation
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 # 297
An analyst is evaluating a vulnerability management dashboard. The analyst sees that a previously remediated vulnerability has reappeared on a database server. Which of the following is the most likely cause?
- A. The vulnerability management software needs to be updated.
- B. A rollback had been executed on the instance.
- C. The finding is a false positive and should be ignored.
- D. The vulnerability scanner was configured without credentials.
正解：B
解説：
A rollback had been executed on the instance. If a database server is restored to a previous state, it may reintroduce a vulnerability that was previously fixed. This can happen due to backup and recovery operations, configuration changes, or software updates. A rollback can undo the patching or mitigation actions that were applied to remediate the vulnerability. Reference: Vulnerability Remediation: It's Not Just Patching, Section: The Remediation Process; Vulnerability assessment for SQL Server, Section: Remediation
質問 # 298
An analyst is suddenly unable to enrich data from the firewall. However, the other open intelligence feeds continue to work. Which of the following is the most likely reason the firewall feed stopped working?
- A. The firewall failed open.
- B. The firewall service account was locked out.
- C. The firewall certificate expired.
- D. The firewall was using a paid feed.
正解：C
解説：
The firewall certificate expired. If the firewall uses a certificate to authenticate and encrypt the feed, and the certificate expires, the feed will stop working until the certificate is renewed or replaced. This can affect the data enrichment process and the security analysis. References: CompTIA CySA+ Study Guide: Exam CS0-
003, 3rd Edition, Chapter 4: Security Operations and Monitoring, page 161.
質問 # 299
Security analysts review logs on multiple servers on a daily basis. Which of the following implementations will give the best central visibility into the events occurring throughout the corporate environment without logging in to the servers individually?
- A. Automate the emailing of logs to the analysts.
- B. Share the log directory on each server to allow local access.
- C. Configure the servers to forward logs to a SIEM
- D. Deploy a database to aggregate the logging
正解：C
解説：
The best implementation to give the best central visibility into the events occurring throughout the corporate environment without logging in to the servers individually is B. Configure the servers to forward logs to a SIEM.
A SIEM (Security Information and Event Management) is a security solution that helps organizations detect, analyze, and respond to security threats before they disrupt business. SIEM tools collect, aggregate, and correlate log data from various sources across an organization's network, such as applications, devices, servers, and users. SIEM tools also provide real-time alerts, dashboards, reports, and incident response capabilities to help security teams identify and mitigate cyberattacks.
By configuring the servers to forward logs to a SIEM, the security analysts can have a central view of potential threats and monitor security incidents across the corporate environment without logging in to the servers individually. This can save time, improve efficiency, and enhance security posture. Deploying a database to aggregate the logging (A) may not provide the same level of analysis, correlation, and alerting as a SIEM tool. Sharing the log directory on each server to allow local access may not be scalable or secure for a large number of servers. Automating the emailing of logs to the analysts (D) may not be timely or effective for real-time threat detection and response. Therefore, B is the best option among the choices given.
質問 # 300
A security analyst needs to provide a copy of a hard drive for forensic analysis.
Which of the following would allow the analyst to perform the task?
- A. find / -type f -exec cp {} /mnt/usb/evidence/ \; sha1sum /mnt/usb/evidence/* >
/mnt/usb/evidence/evidence.hash - B. dd if=/dev/sda of=/mnt/usb/evidence.bin bs=4096; sha5l2sum /mnt/usb/evidence.bin >
/mnt/usb/evidence.bin.hash - C. dcfldd if=/dev/one of=/mnt/usb/evidence.bin hash=md5, sha1
hashlog=/mnt/usb/evidence.bin.hashlog - D. tar -zcf /mnt/usb/evidence.tar.gz / -except /mnt; sha256sum /mnt/usb/evidence.tar.gz >
/mnt/usb/evidence.tar.gz.hash
正解：B
質問 # 301
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