CompTIA Cybersecurity Analyst CS0-003練習テストエンジン: 今すぐ試そう328試験問題
試験合格保証付きのCompTIA Cybersecurity Analyst CS0-003試験問題集
CompTIA CS0-003 認定試験の出題範囲：
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質問 # 24
A security analyst obtained the following table of results from a recent vulnerability assessment that was conducted against a single web server in the environment:
Which of the following should be completed first to remediate the findings?
- A. Ask the web development team to update the page contents
- B. Add the IP address allow listing for control panel access
- C. Purchase an appropriate certificate from a trusted root CA
- D. Perform proper sanitization on all fields
正解：D
解説：
The first action that should be completed to remediate the findings is to perform proper sanitization on all fields. Sanitization is a process that involves validating, filtering, or encoding any user input or data before processing or storing it on a system or application. Sanitization can help prevent various types of attacks, such as cross-site scripting (XSS), SQL injection, or command injection, that exploit unsanitized input or data to execute malicious scripts, commands, or queries on a system or application. Performing proper sanitization on all fields can help address the most critical and common vulnerability found during the vulnerability assessment, which is XSS.
質問 # 25
While configuring a SIEM for an organization, a security analyst is having difficulty correlating incidents across different systems. Which of the following should be checked first?
- A. If appropriate logging levels are set
- B. Data normalization rules
- C. Behavioral correlation settings
- D. NTP configuration on each system
正解：D
質問 # 26
The Chief Executive Officer of an organization recently heard that exploitation of new attacks in the industry was happening approximately 45 days after a patch was released. Which of the following would best protect this organization?
- A. A mean time to remediate of 30 days
- B. A mean time to respond of 15 days
- C. A mean time to detect of 45 days
- D. Third-party application testing
正解：A
解説：
A mean time to remediate (MTTR) is a metric that measures how long it takes to fix a vulnerability after it is discovered. A MTTR of 30 days would best protect the organization from the new attacks that are exploited 45 days after a patch is released, as it would ensure that the vulnerabilities are fixed before they are exploited
質問 # 27
An incident response team is working with law enforcement to investigate an active web server compromise.
The decision has been made to keep the server running and to implement compensating controls for a period of time. The web service must be accessible from the internet via the reverse proxy and must connect to a database server. Which of the following compensating controls will help contain the adversary while meeting the other requirements? (Select two).
- A. Drop the tables on the database server to prevent data exfiltration.
- B. Move the database from the database server to the web server.
- C. Deploy EDR on the web server and the database server to reduce the adversaries capabilities.
- D. Comment out the HTTP account in the / etc/passwd file of the web server
- E. use micro segmentation to restrict connectivity to/from the web and database servers.
- F. Stop the httpd service on the web server so that the adversary can not use web exploits
正解：C、E
解説：
Explanation
Deploying EDR on the web server and the database server to reduce the adversaries capabilities and using micro segmentation to restrict connectivity to/from the web and database servers are two compensating controls that will help contain the adversary while meeting the other requirements. A compensating control is a security measure that is implemented to mitigate the risk of a vulnerability or an attack when the primary control is not feasible or effective. EDR stands for Endpoint Detection and Response, which is a tool that monitors endpoints for malicious activity and provides automated or manual response capabilities. EDR can help contain the adversary by detecting and blocking their actions, such as data exfiltration, lateral movement, privilege escalation, or command execution. Micro segmentation is a technique that divides a network into smaller segments based on policies and rules, and applies granular access controls to each segment. Micro segmentation can help contain the adversary by isolating the web and database servers from other parts of the network, and limiting the traffic that can flow between them. Official References:
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 # 28
The vulnerability analyst reviews threat intelligence regarding emerging vulnerabilities affecting workstations that are used within the company:
Which of the following vulnerabilities should the analyst be most concerned about, knowing that end users frequently click on malicious links sent via email?
- A. Vulnerability B
- B. Vulnerability C
- C. Vulnerability A
- D. Vulnerability D
正解：A
解説：
Explanation
Vulnerability B is the vulnerability that the analyst should be most concerned about, knowing that end users frequently click on malicious links sent via email. Vulnerability B is a remote code execution vulnerability in Microsoft Outlook that allows an attacker to run arbitrary code on the target system by sending a specially crafted email message. This vulnerability is very dangerous, as it does not require any user interaction or attachment opening to trigger the exploit. The attacker only needs to send an email to the victim's Outlook account, and the code will execute automatically when Outlook connects to the Exchange server. This vulnerability has a high severity rating of 9.8 out of 10, and it affects all supported versions of Outlook.
Therefore, the analyst should prioritize patching this vulnerability as soon as possible to prevent potential compromise of the workstations.
質問 # 29
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 network drive was added to allow exfiltration of data
- C. A new program has been set to execute on system start
- D. A fake antivirus program was installed by the user.
正解：C
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 Reference:
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 # 30
A company brings in a consultant to make improvements to its website. After the consultant leaves. a web developer notices unusual activity on the website and submits a suspicious file containing the following code to the security team:
Which of the following did the consultant do?
Implanted a backdoor
Implemented privilege escalation
Implemented clickjacking
Patched the web server
- A. Implanted a backdoor.
正解：A
解説：
A backdoor is a method that allows an unauthorized user to access a system or network without the permission or knowledge of the owner. A backdoor can be installed by exploiting a software vulnerability, by using malware, or by physically modifying the hardware or firmware of the device. A backdoor can be used for various malicious purposes, such as stealing data, installing malware, executing commands, or taking control of the system.
In this case, the consultant implanted a backdoor in the website by using an HTML and PHP code snippet that displays an image of a shutdown button and an alert message that says "Exit". However, the code also echoes the remote address of the server, which means that it sends the IP address of the visitor to the attacker. This way, the attacker can identify and target the visitors of the website and use their IP addresses to launch further attacks or gain access to their devices.
The code snippet is an example of a clickjacking attack, which is a type of interface-based attack that tricks a user into clicking on a hidden or disguised element on a webpage. However, clickjacking is not the main goal of the consultant, but rather a means to implant the backdoor. Therefore, option C is incorrect.
Option B is also incorrect because privilege escalation is an attack technique that allows an attacker to gain higher or more permissions than they are supposed to have on a system or network. Privilege escalation can be achieved by exploiting a software vulnerability, by using malware, or by abusing misconfigurations or weak access controls. However, there is no evidence that the consultant implemented privilege escalation on the website or gained any elevated privileges.
Option D is also incorrect because patching is a process of applying updates to software to fix errors, improve performance, or enhance security. Patching can prevent or mitigate various types of attacks, such as exploits, malware infections, or denial-of-service attacks. However, there is no indication that the consultant patched the web server or improved its security in any way.
Explanation:
The correct answer is
Reference:
1 What Is a Backdoor & How to Prevent Backdoor Attacks (2023)
2 What is Clickjacking? Tutorial & Examples | Web Security Academy
3 What Is Privilege Escalation and How It Relates to Web Security | Acunetix
4 What Is Patching? | Best Practices For Patch Management - cWatch Blog
質問 # 31
An end-of-life date was announced for a widely used OS. A business-critical function is performed by some machinery that is controlled by a PC, which is utilizing the OS that is approaching the end-of- life date. Which of the following best describes a security analyst's concern?
- A. There are no compensating controls in place for the OS.
- B. Any discovered vulnerabilities will not be remediated.
- C. Support will not be available for the critical machinery
- D. An outage of machinery would cost the organization money.
正解：B
解説：
A security analyst's concern is that any discovered vulnerabilities in the OS that is approaching the end-of-life date will not be remediated by the vendor, leaving the system exposed to potential attacks. The other options are not directly related to the security analyst's role or responsibility. Verified Reference: CompTIA Cybersecurity Analyst (CySA+) Certification Exam Objectives, page 9, section 2.21
質問 # 32
Each time a vulnerability assessment team shares the regular report with other teams, inconsistencies regarding versions and patches in the existing infrastructure are discovered. Which of the following is the best solution to decrease the inconsistencies?
- A. Changing from a passive to an active scanning approach
- B. Performing agentless scanning
- C. Implementing a central place to manage IT assets
- D. Implementing credentialed scanning
正解：C
解説：
Implementing a central place to manage IT assets is the best solution to decrease the inconsistencies regarding versions and patches in the existing infrastructure. A central place to manage IT assets, such as a configuration management database (CMDB), can help the vulnerability assessment team to have an accurate and up-to-date inventory of all the hardware and software components in the network, as well as their relationships and dependencies. A CMDB can also track the changes and updates made to the IT assets, and provide a single source of truth for the vulnerability assessment team and other teams to compare and verify the versions and patches of the infrastructure12. Implementing credentialed scanning, changing from a passive to an active scanning approach, and performing agentless scanning are all methods to improve the vulnerability scanning process, but they do not address the root cause of the inconsistencies, which is the lack of a central place to manage IT assets3. References: What is a Configuration Management Database (CMDB)?, How to Use a CMDB to Improve Vulnerability Management, Vulnerability Scanning Best Practices
質問 # 33
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. Deploy a database to aggregate the logging.
- D. Configure the servers to forward logs to a SIEM-
正解：D
解説：
Explanation
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 business1. 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 cyberattacks2345.
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 posture2345.
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 # 34
A security alert was triggered when an end user tried to access a website that is not allowed per organizational policy. Since the action is considered a terminable offense, the SOC analyst collects the authentication logs, web logs, and temporary files, reflecting the web searches from the user's workstation, to build the case for the investigation. Which of the following is the best way to ensure that the investigation complies with HR or privacy policies?
- A. Create a code name for the investigation in the ticketing system so that all personnel with access will not be able to easily identity the case as an HR-related investigation
- B. Create a timeline of events detailinq the date stamps, user account hostname and IP information associated with the activities
- C. Ensure that the case details do not reflect any user-identifiable information Password protect the evidence and restrict access to personnel related to the investigation
- D. Notify the SOC manager for awareness after confirmation that the activity was intentional
正解：C
解説：
Explanation
The best way to ensure that the investigation complies with HR or privacy policies is to ensure that the case details do not reflect any user-identifiable information, such as name, email address, phone number, or employee ID. This can help protect the privacy and confidentiality of the user and prevent any potential discrimination or retaliation. Additionally, password protecting the evidence and restricting access to personnel related to the investigation can help preserve the integrity and security of the evidence and prevent any unauthorized or accidental disclosure or modification.
質問 # 35
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 social engineering attack is underway
- B. A new VPN gateway has been deployed
- C. The security operations center is performing a routine password audit.
- D. This is a normal password change URL.
正解：A
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 # 36
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. Preparation
- B. Recovery
- C. Eradication
- D. Containment
正解：C
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 # 37
The vulnerability analyst reviews threat intelligence regarding emerging vulnerabilities affecting workstations that are used within the company:
Which of the following vulnerabilities should the analyst be most concerned about, knowing that end users frequently click on malicious links sent via email?
- A. Vulnerability B
- B. Vulnerability C
- C. Vulnerability A
- D. Vulnerability D
正解：A
解説：
Vulnerability B is the vulnerability that the analyst should be most concerned about, knowing that end users frequently click on malicious links sent via email. Vulnerability B is a remote code execution vulnerability in Microsoft Outlook that allows an attacker to run arbitrary code on the target system by sending a specially crafted email message. This vulnerability is very dangerous, as it does not require any user interaction or attachment opening to trigger the exploit. The attacker only needs to send an email to the victim's Outlook account, and the code will execute automatically when Outlook connects to the Exchange server. This vulnerability has a high severity rating of 9.8 out of 10, and it affects all supported versions of Outlook.
Therefore, the analyst should prioritize patching this vulnerability as soon as possible to prevent potential compromise of the workstations.
質問 # 38
A security audit for unsecured network services was conducted, and the following output was generated:
Which of the following services should the security team investigate further? (Select two).
- A. 0
- B. 1
- C. 2
- D. 3
- E. 4
- F. 5
正解：A、E
解説：
Explanation
The output shows the results of a port scan, which is a technique used to identify open ports and services running on a network host. Port scanning can be used by attackers to discover potential vulnerabilities and exploit them, or by defenders to assess the security posture and configuration of their network devices1 The output lists six ports that are open on the target host, along with the service name and version associated with each port. The service name indicates the type of application or protocol that is using the port, while the version indicates the specific release or update of the service. The service name and version can provide useful information for both attackers and defenders, as they can reveal the capabilities, features, and weaknesses of the service.
Among the six ports listed, two are particularly risky and should be investigated further by the security team:
port 23 and port 636.
Port 23 is used by Telnet, which is an old and insecure protocol for remote login and command execution.
Telnet does not encrypt any data transmitted over the network, including usernames and passwords, which makes it vulnerable to eavesdropping, interception, and modification by attackers. Telnet also has many known vulnerabilities that can allow attackers to gain unauthorized access, execute arbitrary commands, or cause denial-of-service attacks on the target host23 Port 636 is used by LDAP over SSL/TLS (LDAPS), which is a protocol for accessing and modifying directory services over a secure connection. LDAPS encrypts the data exchanged between the client and the server using SSL/TLS certificates, which provide authentication, confidentiality, and integrity. However, LDAPS can also be vulnerable to attacks if the certificates are not properly configured, verified, or updated. For example, attackers can use self-signed or expired certificates to perform man-in-the-middle attacks, spoofing attacks, or certificate revocation attacks on LDAPS connections.
Therefore, the security team should investigate further why port 23 and port 636 are open on the target host, and what services are running on them. The security team should also consider disabling or replacing these services with more secure alternatives, such as SSH for port 23 and StartTLS for port 6362
質問 # 39
A vulnerability scanner generates the following output:
The company has an SLA for patching that requires time frames to be met for high-risk vulnerabilities. Which of the following should the analyst prioritize first for remediation?
- A. SSL Self-signed Certificate
- B. Cisco Webex
- C. Oracle JDK
- D. Redis Server
正解：D
質問 # 40
A security analyst is trying to identify possible network addresses from different source networks belonging to the same company and region. Which of the following shell script functions could help achieve the goal?
- A. function z() { c=$(geoiplookup$1) && echo "$1 | $c" }
- B. function y() { dig $(dig -x $1 | grep PTR | tail -n 1 | awk -F ".in-addr" '{print
$1}').origin.asn.cymru.com TXT +short } - C. function x() { b=traceroute -m 40 $1 | awk 'END{print $1}') && echo "$1 | $b" }
- D. function w() { a=$(ping -c 1 $1 | awk-F "/" 'END{print $1}') && echo "$1 | $a" }
正解：B
解説：
The shell script function that could help identify possible network addresses from different source networks belonging to the same company and region is:
function y() { dig $(dig -x $1 | grep PTR | tail -n 1 | awk -F ".in-addr" '{print
$1}').origin.asn.cymru.com TXT +short }
This function takes an IP address as an argument and performs two DNS lookups using the dig command. The first lookup uses the -x option to perform a reverse DNS lookup and get the hostname associated with the IP address. The second lookup uses the origin.asn.cymru.com domain to get the autonomous system number (ASN) and other information related to the IP address, such as the country code, registry, or allocation date. The function then prints the IP address and the ASN information, which can help identify any network addresses that belong to the same ASN or region.
質問 # 41
Approximately 100 employees at your company have received a Phishing email. AS a security analyst. you have been tasked with handling this Situation.
Review the information provided and determine the following:
1. HOW many employees Clicked on the link in the Phishing email?
2. on how many workstations was the malware installed?
3. what is the executable file name of the malware?
正解：
解説：
see the answer in explanation for this task.
Explanation:
1. How many employees clicked on the link in the phishing email?
According to the email server logs, 25 employees clicked on the link in the phishing email.
2. On how many workstations was the malware installed?
According to the file server logs, the malware was installed on 15 workstations.
3. What is the executable file name of the malware?
The executable file name of the malware is svchost.EXE.
Answers
* 1. 25
* 2. 15
* 3. svchost.EXE
質問 # 42
The Chief Information Security Officer (CISO) of a large financial institution is seeking a solution that will block a predetermined set of data points from being transferred or downloaded by employees. The CISO also wants to track the data assets by name, type, content, or data profile.
Which of the following BEST describes what the CIS wants to purchase?
- A. SIEM
- B. DLP
- C. Asset tagging
- D. File integrity monitor
正解：B
質問 # 43
Several reports with sensitive information are being disclosed via file sharing services. The company would like to improve its security posture against this threat. Which of the following security controls would best support the company in this scenario?
- A. Implement step-up authentication for administrators.
- B. Increase password complexity standards.
- C. Deploy mobile device management.
- D. Improve employee training and awareness.
正解：D
解説：
Improving employee training and awareness is the best option to address the issue of sensitive reports being disclosed via file sharing services. By educating employees about the risks of unapproved file sharing, the security protocols to follow, and the proper channels to use for sharing company information, an organization can significantly reduce the risk of sensitive data being accidentally or intentionally shared on insecure platforms. This human-centric approach addresses the root cause of the problem. Options A, C, and D are security controls that do not directly address the behavior of sharing sensitive files on unauthorized services.
質問 # 44
A cybersecurity team lead is developing metrics to present in the weekly executive briefs. Executives are interested in knowing how long it takes to stop the spread of malware that enters the network.
Which of the following metrics should the team lead include in the briefs?
- A. Mean time between failures
- B. Mean time to contain
- C. Mean time to detect
- D. Mean time to remediate
正解：B
質問 # 45
Which of the following will most likely ensure that mission-critical services are available in the event of an incident?
- A. Business continuity plan
- B. Vulnerability management plan
- C. Disaster recovery plan
- D. Asset management plan
正解：C
解説：
A disaster recovery plan (DRP) is a document that outlines the steps that an organization will take to recover from a disaster. This includes identifying the organization's critical systems and data, developing a plan to restore those systems and data, and testing the plan regularly.
質問 # 46
A security administrator has been notified by the IT operations department that some vulnerability reports contain an incomplete list of findings. Which of the following methods should be used to resolve this issue?
- A. Differential scan
- B. Credentialed scar
- C. External scan
- D. Network scan
正解：B
解説：
A credentialed scan is a type of vulnerability scan that uses valid credentials to log in to the scanned systems and perform a more thorough and accurate assessment of their vulnerabilities.
A credentialed scan can access more information than a non-credentialed scan, such as registry keys, patch levels, configuration settings, and installed applications. A credentialed scan can also reduce the number of false positives and false negatives, as it can verify the actual state of the system rather than relying on inference or assumptions. The other types of scans are not related to the issue of incomplete findings, as they refer to different aspects of vulnerability scanning, such as the scope, location, or frequency of the scan. An external scan is a scan that is performed from outside the network perimeter, usually from the internet. An external scan can reveal how an attacker would see the network and what vulnerabilities are exposed to the public.
An external scan cannot access internal systems or resources that are behind firewalls or other security controls. A differential scan is a scan that compares the results of two scans and highlights the differences between them. A differential scan can help identify changes in the network environment, such as new vulnerabilities, patched vulnerabilities, or new devices. A differential scan does not provide a complete list of findings by itself, but rather a summary of changes. A network scan is a scan that focuses on the network layer of the OSI model and detects vulnerabilities related to network devices, protocols, services, and configurations. A network scan can discover open ports, misconfigured firewalls, unencrypted traffic, and other network-related issues. A network scan does not provide information about the application layer or the host layer of the OSI model, such as web applications or operating systems.
質問 # 47
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CompTIA CS0-003日常練習試験は2024年最新のに更新された328問あります：https://drive.google.com/open?id=1zjWT1rO7bD0ipyQcPJGSQWTaO7Jnt4kk