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CompTIA CySA+ (CS0-003) Questions 265–272 (page: 35)

Updated On: 7-Jun-2026

When investigating a potentially compromised host, an analyst observes that the process BGInfo.exe (PID 1024), a Sysinternals tool used to create desktop backgrounds containing host details, has been running for over two days. Which of the following activities will provide the best insight into this potentially malicious process, based on the anomalous behavior?

  1. Changes to system environment variables
  2. SMB network traffic related to the system process
  3. Recent browser history of the primary user
  4. Activities taken by PID 1024

Answer(s): D

Explanation:

Option D is correct because investigating the specific activities of PID 1024 directly targets the anomalous process and helps determine malicious behavior (lateral movement, persistence, or data exfiltration) by correlating its actions with system events and other telemetry.
A) Incorrect — Changes to system environment variables may be legitimate for some software and do not directly reveal the full scope of the anomalous process’s behavior. They can be a red herring without process-level context.
B) Incorrect — SMB network traffic related to the system process could indicate exfiltration or lateral movement but is not specific to the process’s internal behavior or intent without corroborating process data.
C) Incorrect — Recent browser history is unlikely to reflect actions of a background Sysinternals utility and does not address the process’s operational behavior on the host.



Which of the following evidence collection methods is most likely to be acceptable in court cases?

  1. Copying all access files at the time of the incident
  2. Creating a file-level archive of all files
  3. Providing a full system backup inventory
  4. Providing a bit-level image of the hard drive

Answer(s): D

Explanation:

Option D is correct because a bit-level image (disk image) preserves the exact data, structure, and metadata of the suspect drive, ensuring integrity and admissibility in court when proper chain-of-custody and hashing are applied. A) Copying all access files at the time of the incident may miss hidden, deleted, or unindexed data and can introduce volatility; it is less defensible as a comprehensive evidentiary source. B) A file-level archive may not capture slack space, unallocated space, or metadata, reducing integrity guarantees. C) A full system backup inventory provides context but not a defensible, forensically sound image suitable as primary evidence.



A cybersecurity analyst has recovered a recently compromised server to its previous state. Which of the following should the analyst perform next?

  1. Eradication
  2. Isolation
  3. Reporting
  4. Forensic analysis

Answer(s): D

Explanation:

Option D is correct because forensic analysis verifies the compromise, preserves evidence, and supports legal and remediation decisions after a system is restored. Eradication (A) focuses on removing threats but may not validate evidence or determine attack vector. Isolation (B) stops spread but is more an immediate containment action, not post-recovery verification. Reporting (C) is important but occurs after analysis; it does not substantiate the compromise itself. Therefore, post-recovery forensic analysis ensures evidence preservation and incident validation.



SIMULATION

You are a penetration tester who is reviewing the system hardening guidelines for a company's distribution center. The company's hardening guidelines indicate the following:

There must be one primary server or service per device.



Only default ports should be used.



Non-secure protocols should be disabled.



The corporate Internet presence should be placed in a protected subnet.



INSTRUCTIONS

Using the tools available, discover devices on the corporate network and the services that are running on these devices.

You must determine:

The IP address of each device.



The primary server or service of each device.



The protocols that should be disabled based on the hardening guidelines.



If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.

  1. See Explanation section for answer.

Answer(s): A

Explanation:

For CandyManCarl.Local, based on the available options and following the guidelines:
1. Choose File Server as the primary service
2. IP address should be 192.168.1.1
3. Disable the following non-secure protocols:
SSH (22) ­ Non-secure remote access protocol.



Telnet (23) ­ Non-secure terminal access protocol.



IMAP (143) ­ Non-secure mail protocol.



FTP (21) ­ Non-secure file transfer protocol.



NetBIOS (139) ­ Often linked with security vulnerabilities.



For FarmerLaura.Local, based on the available options and following the guidelines:
1. Choose Web Server as the primary service
2. IP address 192.168.1.2
3. Disable the following non-secure protocols:

FTP (21) ­ Non-secure file transfer protocol.



SSH (22) ­ Non-secure remote access protocol (depending on the implementation).



Telnet (23) ­ Outdated and insecure protocol for remote access.



IMAP (143) ­ Non-secure mail access protocol.



SMTP (25) ­ Non-secure email transfer protocol (should use encrypted alternatives like SMTPS on port 465



or 587).
NetBIOS (139) ­ Non-secure protocol that may expose the system to vulnerabilities.



RPC (135) ­ Often linked to security risks, especially when exposed externally.



SMB/CIFS (445) ­ Non-secure protocol used for sharing files, which can be exploited if not properly



secured.
MySQL (3306) ­ MySQL database port should be secured if exposed externally.



For SandwichSara.Local, based on the available options and following the guidelines:
1. Choose Web Server as the primary service
2. IP address 192.168.1.3
3. Disable the following non-secure protocols:
FTP (21) ­ Non-secure file transfer protocol.



Telnet (23) ­ Outdated and insecure protocol for remote access.



NetBIOS (139) ­ Protocol often associated with security vulnerabilities.



SMB/CIFS (445) ­ Non-secure file-sharing protocol.



SSH (22) ­ Non-secure remote access protocol (depending on configuration).



IMAP (143) ­ Non-secure mail protocol.



SMTP (25) ­ Should be replaced with encrypted alternatives.



MySQL (3306) ­ If the database is exposed externally, it needs to be secured.



RPC (135) ­ Often associated with vulnerabilities and should be disabled if unnecessary.



For FarmerTed.Local, based on the available options and following the guidelines:
1. Choose Database as the primary service
2. IP address 192.168.1.4
3. Disable the following non-secure protocols:
FTP (21) ­ Non-secure file transfer protocol.



Telnet (23) ­ Outdated and insecure protocol for remote access.



SSH (22) ­ Non-secure remote access protocol (depending on configuration).



IMAP (143) ­ Non-secure mail protocol.



SMTP (25) ­ Non-secure mail transfer protocol.



NetBIOS (139) ­ Non-secure protocol vulnerable to attacks.



RPC (135) ­ Often associated with security vulnerabilities.



SMB/CIFS (445) ­ Non-secure file-sharing protocol.



MySQL (3306) ­ If exposed to the internet or non-secure networks, it needs to be secured.



DNS (53) ­ Should be carefully managed, as DNS exposure can lead to DNS-based attacks.



For LunchTimeMike.Local (located in the DMZ), based on the system hardening guidelines:
1. Choose Web Server as the primary service, since it is likely part of the external corporate presence in the DMZ.
2. Assign an IP address 192.168.2.1 (since it is located in the DMZ, it may be in a different subnet).
3. The following non-compliant services should be disabled to ensure security in the DMZ:
FTP (21) ­ Non-secure file transfer protocol, should be disabled in a DMZ.



Telnet (23) ­ Outdated and insecure protocol for remote access.



NetBIOS (139) ­ Typically insecure and not needed in a DMZ environment.



SMB/CIFS (445) ­ File-sharing protocol that poses a security risk.



IMAP (143) ­ Non-secure email protocol.



SMTP (25) ­ Should be replaced with encrypted alternatives like SMTPS.



MySQL (3306) ­ If exposed externally, should be secured or replaced with a secure database access



method.
RPC (135) ­ Often associated with security risks and should be avoided in a DMZ.



Since LunchTimeMike.Local is in the DMZ, it is important that only secure protocols and services are enabled, especially considering its role in handling internet-facing traffic.



A cybersecurity analyst has been assigned to the threat-hunting team to create a dynamic detection strategy based on behavioral analysis and attack patterns. Which of the following best describes what the analyst will be creating?

  1. Bots
  2. IoCs
  3. TTPs
  4. Signatures

Answer(s): C

Explanation:

TTPs refer to the behaviors, attack patterns, and methodologies used by attackers. By analyzing TTPs, a cybersecurity analyst can create a dynamic detection strategy based on how adversaries operate, rather than relying on static indicators or signatures.



Which of the following would eliminate the need for different passwords for a variety of internal applications?

  1. CASB
  2. SSO
  3. PAM
  4. MFA

Answer(s): B

Explanation:

Single Sign-On (SSO) allows users to authenticate once and gain access to multiple applications without needing to enter different passwords for each application. It simplifies user authentication and improves security by reducing password fatigue.



Which of the following best explains the importance of communicating with staff regarding the official public communication plan related to incidents impacting the organization?

  1. To establish what information is allowed to be released by designated employees
  2. To designate an external public relations firm to represent the organization
  3. To ensure that all news media outlets are informed at the same time
  4. To define how each employee will be contacted after an event occurs

Answer(s): A

Explanation:

Communicating with staff about the official public communication plan is critical to ensure that only authorized and accurate information is shared by designated employees. This helps prevent misinformation and ensures that communication during incidents remains controlled and aligned with the organization's strategy.



Which of the following would most likely be used to update a dashboard that integrates with multiple vendor tools?

  1. Webhooks
  2. Extensible Markup Language
  3. Threat feed combination
  4. JavaScript Object Notation

Answer(s): A

Explanation:

Webhooks are used to send real-time data between applications, enabling updates to a dashboard when changes occur in integrated tools. Webhooks allow different vendor tools to communicate and update the dashboard dynamically as events happen, making them ideal for integrating with multiple systems.



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