Pass the Cisco CyberOps Associate 200-201 Questions and answers with ValidTests

The “ps” command is used to display information about the processes running on a system. The “-ef” option shows the full format listing, which includes the process ID, the user, the CPU and memory usage, the command name, and other details. This can help the engineer identify which processes are consuming the most resources and causing the degraded performance of the server. The other options are either invalid or irrelevant, as they do not provide the necessary information or perform the required action. References := Cisco Cybersecurity

According to the NIST SP 800-61 incident handling process, the SOC team should first isolate the affected endpoints to prevent further spread of the attack and take disk images for analysis (A). This helps in preserving evidence for a thorough investigation. The next step would be to block the connection to the C&C server on the perimeter next-generation firewall ©, which helps to cut off the communication between the compromised endpoint and the attacker’s server, thereby mitigating the threat123.

References: The answers are based on the guidelines provided in the NIST SP 800-61 Computer Security Incident Handling Guide, which outlines the steps for incident handling, including detection, analysis, containment, eradication, recovery, and post-incident activities

The defense-in-depth principle is a strategy of applying multiple layers of security controls to protect an asset from threats. It is based on the assumption that no single security measure is sufficient to prevent all attacks, and that each layer adds more protection and reduces the risk of compromise. One example of applying the defense-in-depth principle is implementing alerts for unexpected asset malfunctions, which can indicate a potential security breach or incident. References: Cisco Cybersecurity Operations Fundamentals, Module 1: Security Concepts, Lesson 1.1: The CIA Triad and Security Concepts, Topic 1.1.4: Defense-in-Depth Principle

Patch management is the process of distributing and managing updates to software and systems. These updates can include patches for security vulnerabilities, bug fixes, and enhancements to improve performance or add new features. It ensures that systems are up-to-date, secure, and performing optimally. References := Cisco Cybersecurity Training

Rule-based detection systems operate using predefined patterns and signatures to identify known threats. These patterns are based on prior knowledge of attack methods and vulnerabilities.

Behavioral detection systems, on the other hand, analyze the normal behavior of a network or system to establish a baseline. They then monitor for deviations from this baseline, which may indicate potential threats.

Rule-based systems are effective at detecting known threats but may struggle with novel or zero-day attacks that do not match existing signatures.

Behavioral systems can detect unknown threats by recognizing abnormal activities, making them useful in identifying zero-day exploits and other sophisticated attacks.

References

Comparison of Rule-based and Behavioral Detection Methods in IDS

Advantages of Behavioral Analysis in Network Security

Cybersecurity Detection Techniques

The exhibit shows a high rate of SYN packets being sent from multiple sources towards a single destination IP. This is indicative of a SYN flood attack, where the attacker sends a succession of SYN requests to a target’s system in an attempt to consume enough server resources to make the system unresponsive to legitimate traffic. References := Cisco Cybersecurity Operations Fundamentals - Module 4: Network Intrusion Analysis

 The virtual address space for a Windows process is the set of virtual memory addresses that can be used by the process. Each process has its own virtual address space that is isolated from other processes. The virtual address space is divided into regions that have different attributes, such as read-only, read-write, execute, and so on. The virtual address space is mapped to the physical memory by the operating system using a data structure called a page table. References:

Understanding Cisco Cybersecurity Operations Fundamentals (CBROPS) v1.0, Module 4: Host-Based Analysis, Lesson 4.1: Windows Operating System

Virtual Address Space

 According to the NIST Computer Security Incident Handling Guide, the next step in handling an event after confirming a potential indicator of compromise on an endpoint is to collect public information on the malware behavior. This step involves searching for information from various sources, such as antivirus vendors, security blogs, threat intelligence feeds, and online forums, to learn more about the characteristics, capabilities, and impact of the malware. This information can help the SOC team to identify the type, severity, and scope of the incident, as well as to determine the appropriate response actions and mitigation strategies. Isolating the infected endpoint, performing forensics analysis, and prioritizing incident handling are subsequent steps that follow after collecting public information on the malware behavior. References:

Computer Security Incident Handling Guide

SP 800-61 Rev. 2, Computer Security Incident Handling Guide

 Protected data refers to any information that is legally guarded or sensitive due to its nature. In the context of the organization described, the main database contains Intellectual Property (IP), which includes patents that are legally protected forms of inventions and designs. The secondary database holds Personally Identifiable Information (PII), which comprises data that can be used to identify individuals, such as names and contact details. Both IP and PII are considered protected data and should be identified during an internal audit to ensure they are handled according to legal and regulatory standards. References: Understanding Cisco Cybersecurity Operations Fundamentals (CBROPS)

The regular expression c(rgr)+e matches strings where “rgr” occurs one or more times between “c” and “e”. The string “crgrrgre” fits this pattern as it has the sequence “rgr” repeated twice between “c” and “e”. The plus sign (+) in the regular expression indicates that the preceding element must appear one or more times for a match to occur