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CompTIA Cybersecurity Analyst (CySA+) 認證考試，也稱為 CS0-003，是一項時長 165 分鐘的考試，包含 85 道多選和績效型問題。此考試旨在測試候選人識別、分析和應對安全威脅和事件的能力。此考試涵蓋各種主題，包括網絡安全、安全運營和監控、威脅情報和事件響應等。
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CySA+ 認證考試涵蓋各種主題，如網絡安全、漏洞管理、威脅管理、事件應對以及合規性和法規。該考試重點考察實踐性、實戰性技能，這些技能是進行網絡安全分析工作所必需的。這項認證特別適合從事網絡安全分析師、安全工程師、安全顧問和網絡安全分析師等職業的個人。通過獲得 CySA+ 認證，專業人士可以展示他們在網絡安全分析領域的專業知識，並提高職業前景。
問題 #481
Which of the following characteristics ensures the security of an automated information system is the most effective and economical?
答案：A
解題說明：
Comprehensive Detailed Explanation:The most effective and economical way to ensure the security of an automated information system is to design it with security in mind from the outset. This is often referred to as
"security by design." Here's a breakdown of each option and why option A is correct:
* A. Originally designed to provide necessary security
* Explanation: Systems designed with security from the beginning integrate secure practices and considerations during the development process. This approach mitigates the need for costly and complex retroactive security implementations, which are common in systems where security was an afterthought.
* Cost Efficiency: Security implementations at the design stage can be embedded into the system architecture, reducing the costs associated with later modifications.
* Effectiveness: Security-by-design approaches often result in robust systems that are more resilient to vulnerabilities because they address security concerns at each development phase.
* B. Subjected to intense security testing
* While rigorous security testing (such as penetration testing and vulnerability assessments) is essential, it is reactive. Security testing is more effective when applied to systems already designed with foundational security principles, ensuring that tests identify potential flaws in an inherently secure system.
* C. Customized to meet specific security threats
* Customizing security to meet specific threats addresses unique risks, but such a targeted approach may miss new or emerging threats not initially considered. It also risks neglecting fundamental security practices that apply universally, leading to potential vulnerabilities.
* D. Optimized prior to the addition of security
* Optimizing a system before adding security features may enhance performance but does not guarantee security. Security cannot be effectively added onto a system as an afterthought without incurring additional costs or creating potential weaknesses.
問題 #482
An organization's website was maliciously altered.
INSTRUCTIONS
Review information in each tab to select the source IP the analyst should be concerned about, the indicator of compromise, and the two appropriate corrective actions.
答案：
解題說明：
see the explanation for step by step solution.
Explanation:
Step 1: Analyzing the SFTP Log
The SFTP log provides a record of file transfer and login activities:
* User "sjames" logged in from several IP addresses:
* 192.168.10.32 and 192.168.10.37 (internal network IPs)
* 32.111.16.37 and 41.21.18.102 (external IPs)
* We see file alterations in the /var/www directory, which is commonly the web directory.
* Modified files: about_us.html, index.html
* Suspicious activity:
* 192.168.11.102 and 41.21.18.102 modified the files.
* 32.111.16.37 had failed login attempts, indicating possible unauthorized access attempts.
The most suspicious IP here is 41.21.18.102, as it's associated with direct file modifications, possibly indicating unauthorized access.
Step 2: Reviewing Netstat
The netstat output shows active connections and their states:
* IP 41.21.18.102 has an ESTABLISHED connection with port 22, commonly used for SFTP.
* IP 32.111.16.37 is also attempting connections, and 32.111.16.37 connections are in a TIME_WAIT state, showing prior connections were recently closed.
The netstat output reaffirms 41.21.18.102 is actively connected and potentially involved in malicious activities.
Step 3: Checking the HTTP Access Log
The HTTP Access log shows access to about_us.html:
* 32.111.16.37 repeatedly accessed /about_us.html with 404 errors, indicating attempts to reach non- existing pages.
* 41.21.18.102 accessed the 200 status code, showing successful page requests, but since this IP was modifying files directly on the server, it might be testing or verifying changes.
Again, 41.21.18.102 stands out as it matches both successful file modification and page request patterns, while 32.111.16.37 shows unsuccessful attempts.
Step 4: Selecting the IP of Concern
Based on the above analysis:
* 41.21.18.102 should be the IP of concern due to its direct file modifications on critical web files (about_us.html, index.html).
Step 5: Identifying the Indicator of Compromise
Potential indicators include unauthorized file modifications:
* Modified index.html file is the correct answer, as it indicates direct changes to website content and is often a clear sign of compromise.
Step 6: Selecting Corrective Actions
To mitigate and prevent further compromise:
* Change the password on the "sjames" account: The account was used across various IPs, indicating potential account compromise.
* Block external SFTP access: Restricting SFTP to internal IPs only would prevent unauthorized external modifications. Since 41.21.18.102 was external, this would stop similar threats.
Summary
* IP of Concern: 41.21.18.102
* Indicator of Compromise: Modified index.html file
* Corrective Actions:
* Change the password on the sjames account
* Block external SFTP access
These selections address both the immediate security breach and implement a preventative measure against future unauthorized access.
問題 #483
An organization enabled a SIEM rule to send an alert to a security analyst distribution list when ten failed logins occur within one minute. However, the control was unable to detect an attack with nine failed logins.
Which of the following best represents what occurred?
答案：D
解題說明：
The correct answer is C. False negative.
A false negative is a situation where an attack or a threat is not detected by a security control, even though it should have been. In this case, the SIEM rule was unable to detect an attack with nine failed logins, which is below the threshold of ten failed logins that triggers an alert. This means that the SIEM rule missed a potential attack and failed to alert the security analysts, resulting in a false negative.
A false positive is a situation where a benign or normal activity is detected as an attack or a threat by a security control, even though it is not. A true negative is a situation where a benign or normal activity is not detected as an attack or a threat by a security control, as expected. A true positive is a situation where an attack or a threat is detected by a security control, as expected. These are not the correct answers for this question.
問題 #484
A security analyst is concerned about the high volume of network traffic generated during monthly vulnerability scans. The organization has many remote offices with limited bandwidth connections. Which of the following scanning methods should the analyst implement to best reduce network traffic while maintaining deep visibility?
答案：C
解題說明：
Agent-based scansare runlocally on hostsvia installed agents, whichsignificantly reduces network trafficwhile allowing in-depth visibility and accurate scanning. They're ideal for bandwidth-limited or sensitive networks.
* Credentialed scans (A)still transmit data over the network.
* Individual scans (B)is ambiguous and not a standard term.
* Baseline scans (C)focus on policy compliance, not reducing traffic.
?Reference:
* Chapple & Seidl - Vulnerability Management, Chapter 6: Scanning Techniques
* CS0-003 Domain 2.1 - Vulnerability Scanning Methods
問題 #485
Company A is in the process of merging with Company B. As part of the merger, connectivity between the ERP systems must be established so pertinent financial information can be shared between the two entities. Which of the following will establish a more automated approach to secure data transfers between the two entities?
答案：A
問題 #486
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CS0-003熱門認證: https://www.kaoguti.com/CS0-003_exam-pdf.html
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