CS0-003問題集PDFは最新 [2025年最新] 究極な学習ガイド
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質問 # 92
An incident response team detected malicious software that could have gained access to credit card data. The incident response team was able to mitigate significant damage and implement corrective actions. By having incident response mechanisms in place. Which of the following should be notified for lessons learned?
- A. The human resources department
- B. Customers
- C. The legal team
- D. Company leadership
正解：D
質問 # 93
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 # 94
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
A computer screen with white text Description automatically generated
質問 # 95
SIMULATION
A healthcare organization must develop an action plan based on the findings from a risk assessment. The action plan must consist of:
- Risk categorization
- Risk prioritization
- Implementation of controls
INSTRUCTIONS
Click on the audit report, risk matrix, and SLA expectations documents to review their contents.
On the Risk categorization tab, determine the order in which the findings must be prioritized for remediation according to the risk rating score. Then, assign a categorization to each risk.
On the Controls tab, select the appropriate control(s) to implement for each risk finding. Findings may have more than one control implemented. Some controls may be used more than once or not at all.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.
正解：
解説：
質問 # 96
In the last hour, a high volume of failed RDP authentication attempts has been logged on a critical server. All of the authentication attempts originated from the same remote IP address and made use of a single valid domain user account. Which of the following mitigating controls would be most effective to reduce the rate of success of this brute-force attack? (Choose two.)
- A. Implement a firewall block for the IP address of the remote system.
- B. Configure user account lockout after a limited number of failed attempts.
- C. Block inbound to TCP port 3389 from untrusted remote IP addresses at the perimeter firewall.
- D. Increase the granularity of log-on event auditing on all devices.
- E. Enable host firewall rules to block all outbound traffic to TCP port 3389.
- F. Install a third-party remote access tool and disable RDP on all devices.
正解：B、C
解説：
To mitigate brute-force attacks, implementing an account lockout policy (C) prevents continuous attempts by locking the account after a set number of failed logins. Blocking inbound connections on TCP port 3389 (RDP) from untrusted IP addresses (F) limits access, reducing the attack surface.
質問 # 97
An organization conducted a web application vulnerability assessment against the corporate website, and the following output was observed:
Which of the following tuning recommendations should the security analyst share?
- A. Block requests without an X-Frame-Options header.
- B. Disable the cross-origin resource sharing header.
- C. Configure an Access-Control-Allow-Origin header to authorized domains.
- D. Set an Http Only flag to force communication by HTTPS.
正解：C
解説：
The output shows that the web application has a cross-origin resource sharing (CORS) header that allows any origin to access its resources. This is a security misconfiguration that could allow malicious websites to make requests to the web application on behalf of the user and access sensitive data or perform unauthorized actions.
The tuning recommendation is to configure the Access-Control-Allow-Origin header to only allow authorized domains that need to access the web application's resources. This would prevent unauthorized cross-origin requests and reduce the risk of cross-site request forgery (CSRF) attacks.
質問 # 98
A SOC manager is establishing a reporting process to manage vulnerabilities. Which of the following would be the best solution to identify potential loss incurred by an issue?
- A. Risk score
- B. Trends
- C. Prioritization
- D. Mitigation
正解：A
解説：
A risk score is a numerical value that represents the potential impact and likelihood of a vulnerability being exploited. It can help to identify the potential loss incurred by an issue and prioritize remediation efforts accordingly.
質問 # 99
A company has the following security requirements:
- No public IPs
- All data secured at rest
- No insecure ports/protocols
After a cloud scan is completed a security analyst receives reports that several misconfigurations are putting the company at risk. Given the following cloud scanner output:
Which of the following should the analyst recommend be updated first to meet the security requirements and reduce risks?
- A. VM_PRD_DB
- B. VM_DEV_DB
- C. VM_DEV_Web02
- D. VM_PRD_Web01
正解：A
解説：
In Option A the Encryption says NO, and Port 80 is HTTP which by itself is not the problem but when the web server is serving requests over and unencrypted network, or when the data is unencrypted then... there's a problem. Also the IP is public. this violates all the rules stated above.
質問 # 100
The Chief Information Security Officer wants to eliminate and reduce shadow IT in the enterprise.
Several high-risk cloud applications are used that increase the risk to the organization. Which of the following solutions will assist in reducing the risk?
- A. Deploy a CASB and enable policy enforcement
- B. Enable SSO to the cloud applications
- C. Configure MFA with strict access
- D. Deploy an API gateway
正解：A
解説：
A cloud access security broker (CASB) is a security solution that helps organizations manage and secure their cloud applications. CASBs can be used to enforce security policies, monitor cloud usage, and detect and block malicious activity.
In this case, the Chief Information Security Officer (CISO) wants to reduce the risk of shadow IT by enforcing security policies on the high-risk cloud applications. A CASB can be used to do this by providing visibility into cloud usage, identifying unauthorized applications, and enforcing security policies.
質問 # 101
An analyst has been asked to validate the potential risk of a new ransomware campaign that the Chief Financial Officer read about in the newspaper. The company is a manufacturer of a very small spring used in the newest fighter jet and is a critical piece of the supply chain for this aircraft. Which of the following would be the best threat intelligence source to learn about this new campaign?
- A. Deep/dark web
- B. Cybersecurity incident response team
- C. Blogs/forums
- D. Information sharing organization
正解：D
解説：
An information sharing organization is a group or network of organizations that share threat intelligence, best practices, or lessons learned related to cybersecurity issues or incidents. An information sharing organization can help security analysts learn about new ransomware campaigns or other emerging threats, as well as get recommendations or guidance on how to prevent, detect, or respond to them. An information sharing organization can also help security analysts collaborate or coordinate with other organizations in the same industry or region that may face similar threats or challenges.
質問 # 102
A security analyst has identified a new malware file that has impacted the organization. The malware is polymorphic and has built-in conditional triggers that require a connection to the internet. The CPU has an idle process of at least 70%. Which of the following best describes how the security analyst can effectively review the malware without compromising the organization's network?
- A. Subscribe to an online service to create a sandbox environment.
- B. Utilize an RDP session on an unused workstation to evaluate the malware.
- C. Create a virtual host for testing on the security analyst workstation.
- D. Disconnect and utilize an existing infected asset off the network.
正解：A
解説：
A sandbox environment is a safe and isolated way to analyze malware without affecting the organization's network. An online service can provide a sandbox environment without requiring the security analyst to set up a virtual host or use an RDP session. Disconnecting and using an existing infected asset is risky and may not provide accurate results.
質問 # 103
A security analyst reviews the following results of a Nikto scan:
Which of the following should the security administrator investigate next?
- A. sshome
- B. phpList
- C. tiki
- D. shtml.exe
正解：D
解説：
The security administrator should investigate shtml.exe next, as it is a potential vulnerability that allows remote code execution on the web server. Nikto scan results indicate that the web server is running Apache on Windows, and that the shtml.exe file is accessible in the /scripts/ directory.
This file is part of the Server Side Includes (SSI) feature, which allows dynamic content generation on web pages. However, if the SSI feature is not configured properly, it can allow attackers to execute arbitrary commands on the web server by injecting malicious code into the URL or the web page. Therefore, the security administrator should check the SSI configuration and permissions, and remove or disable the shtml.exe file if it is not needed.
質問 # 104
A security analyst reviews the following results of a Nikto scan:
Which of the following should the security administrator investigate next?
- A. sshome
- B. phpList
- C. tiki
- D. shtml.exe
正解：D
解説：
The security administrator should investigate shtml.exe next, as it is a potential vulnerability that allows remote code execution on the web server. Nikto scan results indicate that the web server is running Apache on Windows, and that the shtml.exe file is accessible in the /scripts/ directory. This file is part of the Server Side Includes (SSI) feature, which allows dynamic content generation on web pages. However, if the SSI feature is not configured properly, it can allow attackers to execute arbitrary commands on the web server by injecting malicious code into the URL or the web page12. Therefore, the security administrator should check the SSI configuration and permissions, and remove or disable the shtml.exe file if it is not needed. References:
Nikto-Penetration testing. Introduction, Web application scanning with Nikto
質問 # 105
An attacker recently gained unauthorized access to a financial institution's database, which contains confidential information. The attacker exfiltrated a large amount of data before being detected and blocked. A security analyst needs to complete a root cause analysis to determine how the attacker was able to gain access. Which of the following should the analyst perform first?
- A. Interview employees responsible for managing the affected systems.
- B. Document the incident and any findings related to the attack for future reference.
- C. Identify the immediate actions that need to be taken to contain the incident and minimize damage.
- D. Review the log files that record all events related to client applications and user access.
正解：D
解説：
In a root cause analysis following unauthorized access, the initial step is usually to review relevant log files. These logs can provide critical information about how and when the attacker gained access.
The first step in a root cause analysis after a data breach is typically to review the logs. This helps the analyst understand how the attacker gained access by providing a detailed record of all events, including unauthorized or abnormal activities. Documenting the incident, interviewing employees, and identifying immediate containment actions are important steps, but they usually follow the initial log review.
質問 # 106
A security analyst runs the following command:
# nmap -T4 -F 192.168.30.30
Starting nmap 7.6
Host is up (0.13s latency)
PORT STATE SERVICE
23/tcp open telnet
443/tcp open https
636/tcp open ldaps
Which of the following should the analyst recommend first to harden the system?
- A. Deploy a publicly trusted root CA for secure websites.
- B. Disable all protocols that do not use encryption.
- C. Configure client certificates for domain services.
- D. Ensure that this system is behind a NGFW.
正解：B
解説：
The nmap scan results show that Telnet (port 23) is open. Telnet transmits data, including credentials, in plaintext, which is insecure and should be disabled to enhance security.
Disabling unencrypted protocols (such as Telnet) reduces exposure to man-in-the-middle (MITM) attacks and credential sniffing. Telnet should be replaced with a secure protocol like SSH, which provides encryption for transmitted data.
質問 # 107
An incident response analyst is taking over an investigation from another analyst. The investigation has been going on for the past few days. Which of the following steps is most important during the transition between the two analysts?
- A. Review the steps that the previous analyst followed.
- B. Validate the root cause from the prior analyst.
- C. Accept all findings and continue to investigate the next item target.
- D. Identify and discuss the lessons learned with the prior analyst.
正解：A
解説：
Reviewing the steps that the previous analyst followed is the most important step during the transition, as it ensures continuity and consistency of the investigation. It also helps the new analyst to understand the current status, scope, and findings of the investigation, and to avoid repeating the same actions or missing any important details. The other options are either less important, premature, or potentially biased.
質問 # 108
During an internal code review, software called "ACE" was discovered to have a vulnerability that allows the execution of arbitrary code. The vulnerability is in a legacy, third-party vendor resource that is used by the ACE software. ACE is used worldwide and is essential for many businesses in this industry. Developers informed the Chief Information Security Officer that removal of the vulnerability will take time. Which of the following is the first action to take?
- A. Inform customers of the vulnerability.
- B. Remove the affected vendor resource from the ACE software.
- C. Look for potential loCs in the company.
- D. Develop a compensating control until the issue can be fixed permanently.
正解：D
解説：
A compensating control is an alternative measure that provides a similar level of protection as the original control, but is used when the original control is not feasible or cost-effective. In this case, the CISO should develop a compensating control to mitigate the risk of the vulnerability in the ACE software, such as implementing additional monitoring, firewall rules, or encryption, until the issue can be fixed permanently by the developers. References: CompTIA CySA+ Study Guide: Exam CS0-003, 3rd Edition, Chapter 5, page
197; CompTIA CySA+ CS0-003 Certification Study Guide, Chapter 5, page 205.
質問 # 109
A cloud team received an alert that unauthorized resources were being auto-provisioned. After investigating, the team suspects that crypto mining is occurring. Which of the following indicators would most likely lead the team to this conclusion?
.
- A. Bandwidth consumption
- B. Unusual traffic spikes
- C. Unauthorized changes
- D. High GPU utilization
正解：D
解説：
High GPU utilization is the most likely indicator that cryptomining is occurring, as it reflects the intensive computational work that is required to solve the complex mathematical problems involved in mining cryptocurrencies. Cryptomining is the process of generating new units of a cryptocurrency by using computing power to verify transactions and create new blocks on the blockchain. Cryptomining can be done legitimately by individuals or groups who participate in a mining pool and share the rewards, or illegitimately by threat actors who use malware or scripts to hijack the computing resources of unsuspecting victims and use them for their own benefit. This practice is called cryptojacking, and it can cause performance degradation, increased power consumption, and security risks for the affected systems. Cryptomining typically relies on the GPU (graphics processing unit) rather than the CPU (central processing unit), as the GPU is better suited for parallel processing and can handle more calculations per second. Therefore, a high GPU utilization rate can be a sign that cryptomining is taking place on a system, especially if there is no other explanation for the increased workload. The other options are not as indicative of cryptomining as high GPU utilization, as they can have other causes or explanations. Bandwidth consumption can be affected by many factors, such as network traffic, streaming services, downloads, or updates. It is not directly related to cryptomining, which does not require a lot of bandwidth to communicate with the mining pool or the blockchain network.
Unauthorized changes can be a result of many types of malware or cyberattacks, such as ransomware, spyware, or trojans. They are not specific to cryptomining, which does not necessarily alter any files or settings on the system, but rather uses its processing power. Unusual traffic spikes can also be caused by various factors, such as legitimate surges in demand, distributed denial-of-service attacks, or botnets. They are not indicative of cryptomining, which does not generate a lot of traffic or requests to or from the system.
質問 # 110
An organization would like to ensure its cloud infrastructure has a hardened configuration. A requirement is to create a server image that can be deployed with a secure template. Which of the following is the best resource to ensure secure configuration?
- A. CIS Benchmarks
- B. OWASP Top Ten
- C. PCI DSS
- D. ISO 27001
正解：A
解説：
The best resource to ensure secure configuration of cloud infrastructure is
A) CIS Benchmarks. CIS Benchmarks are a set of prescriptive configuration recommendations for various technologies, including cloud providers, operating systems, network devices, and server software. They are developed by a global community of cybersecurity experts and help organizations protect their systems against threats more confidently1
PCI DSS, OWASP Top Ten, and ISO 27001 are also important standards for information security, but they are not focused on providing specific guidance for hardening cloud infrastructure. PCI DSS is a compliance scheme for payment card transactions, OWASP Top Ten is a list of common web application security risks, and ISO 27001 is a framework for establishing and maintaining an information security management system. These standards may have some relevance for cloud security, but they are not as comprehensive and detailed as CIS Benchmarks
質問 # 111
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. Shell script
- C. Ruby
- D. PowerShel
正解：D
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 # 112
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CompTIA CS0-003 認定試験の出題範囲：
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あなたを合格させるCompTIA試験にはCS0-003試験問題集：https://www.passtest.jp/CompTIA/CS0-003-shiken.html
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