CompTIA CS0-003 Online Practice Questions and Exam Preparation

CompTIA CS0-003 Online Questions & Answers

• Question 521:

  A SOC manager receives a phone call from an upset customer. The customer received a vulnerability report two hours ago: but the report did not have a follow-up remediation response from an analyst.

  Which of the following documents should the SOC manager review to ensure the team is meeting the appropriate contractual obligations for the customer?

  A. SLA
  B. MOU
  C. NDA
  D. Limitation of liability
  A. SLA

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  Explanation

  SLA stands for service level agreement, which is a contract or document that defines the expectations and obligations between a service provider and a customer regarding the quality, availability, performance, or scope of a service. An SLA may also specify the metrics, penalties, or remedies for measuring or ensuring compliance with the agreed service levels. An SLA can help the SOC manager review if the team is meeting the appropriate contractual obligations for the customer, such as response time, resolution time, reporting frequency, or communication channels.

• Question 522:

  Which of following attack methodology frameworks should a cybersecurity analyst use to identify similar TTPs utilized by nation-state actors?

  A. Cyber kill chains
  B. Diamond Model of Intrusion Analysis
  C. OWASP Testing Guide
  D. MITRE ATT&CK matrix
  D. MITRE ATT&CK matrix

• Question 523:

  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?

  A. Implanted a backdoor
  B. Implemented privilege escalation
  C. Implemented clickjacking
  D. Patched the web server
  A. Implanted a backdoor

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  Explanation

  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.

  References:

  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

• Question 524:

  Which of the following describes a contract that is used to define the various levels of maintenance to be provided by an external business vendor in a secure environment?

  A. MOU
  B. NDA
  C. BIA
  D. SLA
  D. SLA

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  Explanation

  SLA stands for Service Level Agreement, which is a contract that defines the various levels of maintenance to be provided by an external business vendor in a secure environment. An SLA specifies the expectations, responsibilities, and obligations of both parties, such as the scope, quality, availability, and performance of the service, as well as the metrics and methods for measuring and reporting the service level. An SLA also outlines the penalties or remedies for any breach or failure of the service level. An SLA can help ensure that the external business vendor delivers the service in a timely, consistent, and secure manner, and that the customer receives the service that meets their needs and requirements.

  Official References:

  https://partners.comptia.org/docs/default-source/resources/comptia-cysa-cs0-002-exam-objectiveshttps://www.comptia.org/certifications/cybersecurity-analysthttps://www.comptia.org/blog/the-new-comptia-cybersecurity-analyst-your-questions-answered

• Question 525:

  Which of the following best describes the importance of KPIs in an incident response exercise?

  A. To identify the personal performance of each analyst
  B. To describe how incidents were resolved
  C. To reveal what the team needs to prioritize
  D. To expose which tools should be used
  C. To reveal what the team needs to prioritize

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  Explanation

  Key Performance Indicators (KPIs) in incident response exercises help organizations prioritize improvements by measuring response effectiveness, containment success, and recovery speed. This ensures that resources are focused on the most critical areas for enhancement.

  Option A (Personal performance tracking) is more relevant to HR evaluations rather than cybersecurity operations.

  Option B (Describing incident resolution) is important but does not define future priorities.

  Option D (Identifying tools to use) is useful but not the primary function of KPIs. Thus, C is the correct answer, as KPIs help teams identify the most urgent areas for improvement.

• Question 526:

  A newly hired security manager in a SOC wants to improve efficiency by automating routine tasks.

  Which of the following SOC tasks is most suitable for automation?

  A. Conducting security assessments and audits of IT systems
  B. Investigating security incidents and determining the root causes
  C. Reviewing logs and alerts to identify security threats and anomalies
  D. Generating incident reports and notifying the appropriate stakeholders
  C. Reviewing logs and alerts to identify security threats and anomalies

• Question 527:

  An analyst is reviewing a vulnerability report for a server environment with the following entries:

  

  Which of the following systems should be prioritized for patching first?

  A. 10.101.27.98
  B. 54.73.225.17
  C. 54.74.110.26
  D. 54.74.110.228
  D. 54.74.110.228

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  Explanation

  The system that should be prioritized for patching first is 54.74.110.228, as it has the highest number and severity of vulnerabilities among the four systems listed in the vulnerability report. According to the report, this system has 12 vulnerabilities, with 8 critical, 3 high, and 1 medium severity ratings. The critical vulnerabilities include CVE-2019-0708 (BlueKeep), CVE-2019-1182 (DejaBlue), CVE-2017- 0144 (EternalBlue), and CVE-2017-0145 (EternalRomance), which are all remote code execution vulnerabilities that can allow an attacker to compromise the system without any user interaction or authentication. These vulnerabilities pose a high risk to the system and should be patched as soon as possible.

• Question 528:

  A system that provides the user interface for a critical server has potentially been corrupted by malware.

  Which of the following is the best recommendation to ensure business continuity?

  A. System isolation
  B. Reimaging
  C. Malware removal
  D. Vulnerability scanning
  B. Reimaging

• Question 529:

  A security analyst wants to implement new monitoring controls in order to find abnormal account activity for traveling employees.

  Which of the following techniques would deliver the expected results?

  A. Malicious command interpretation
  B. Network monitoring
  C. User behavior analysis
  D. SSL inspection
  C. User behavior analysis

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  Explanation

  User behavior analysis (UBA) is the most effective method for detecting abnormal account activity.

  UBA uses machine learning and behavioral analytics to identify patterns in how users interact with systems. If an employee suddenly logs in from an unusual location or accesses resources outside of their normal behavior, it raises an alert.

  Option A (Malicious command interpretation) is focused on malware analysis, not user behavior.

  Option B (Network monitoring) detects anomalies at the network level, but does not specifically focus on user behaviors.

  Option D (SSL Inspection) is useful for decrypting encrypted traffic, but it does not analyze user activity patterns.

• Question 530:

  A security analyst needs to prioritize vulnerabilities for patching. Given the following vulnerability and system information:

  

  Which of the following systems should the analyst patch first?

  A. System 1
  B. System 2
  C. System 3
  D. System 4
  E. System 5
  F. System 6
  D. System 4

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  Explanation

  When prioritizing vulnerabilities, analysts consider the CVSS score, whether the system is internet-facing, and if sensitive data is involved. The primary goal is to mitigate the most exploitable and impactful risks first.

  Let's break down the key components:

  Attack Vector (AV): Whether the attack can be launched remotely (N = Network) or locally (L = Local).

  Attack Complexity (AC): The difficulty of executing the attack (L = Low, H = High).

  Privileges Required (PR): The level of access needed for exploitation (N = None, L = Low, H = High).

  User Interaction (UI): Whether user interaction is required for the attack (N = No, R = Required).

  Scope (S): Whether the attack affects other systems (C = Changed, U = Unchanged).

  Confidentiality (C), Integrity (I),

  Availability (A): The impact level (H = High, L = Low, N = None).

  Evaluating Each System:

  System 1 (CVSS: AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H) System 2 (CVSS: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H) System 3 (CVSS: AV:P/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:L) System 4 (CVSS: AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:H) System 5 (CVSS: AV:L/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N) System 6 (CVSS: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H)

  Final Decision: Patch System 4 First System 4 is the most critical because: It is internet-facing (higher exposure).

  It has a high CVSS score.

  It requires no privileges (easy to exploit).

  It has system-wide scope impact (can affect other systems). Thus, it should be patched first to minimize security risks.