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300-215 exam dumps: questions 101 to 200 of 228

Page 2 of the free 300-215 question bank for the Conducting Forensic Analysis and Incident Response Using Cisco Technologies for Cybersecurity exam. Questions 101 to 200 are listed below, the first 5 in full with answers and explanations. Back to page 1 for the exam overview and FAQ.

Question bank last updated February 2025

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Free 300-215 practice questions

Questions 101 to 105 of 228

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300-215 Question 101

Select 3

You are a security analyst tasked with analyzing logs from Cisco Secure Endpoint and Cisco Umbrella to identify indicators of compromise (IoCs) associated with a phishing campaign. You decide to write a Python script to parse and search the logs for specific IoCs such as suspicious domains and file hashes. Which of the following steps should be included in your script to complete this task effectively?

A
Use Python's 'requests' library to retrieve logs via the APIs of Cisco Secure Endpoint and Cisco Umbrella.
B
Filter the logs using regular expressions to match known IoCs such as suspicious domains and file hashes.
C
Write a function to establish a secure connection to the PX Grid platform for real-time threat intelligence data.
D
Store the results of the parsed logs in a structured format such as JSON or CSV for further analysis.
E
Use Bash to query the Cisco Secure Network Analytics database directly for additional threat context.

Show answer and explanation

Correct answers: A, B, D

Explanation

To effectively parse and search logs from Cisco Secure Endpoint and Cisco Umbrella, your script should retrieve the logs via their APIs, filter the logs for known IoCs using tools like regular expressions, and store the results in structured formats for further analysis. Steps or tools unrelated to the specified data sources, such as PX Grid or Bash, are unnecessary for this task.

A. Correct.
This is correct because using Python’s 'requests' library is a common method to interact with APIs like those provided by Cisco Secure Endpoint and Cisco Umbrella for retrieving log data.
B. Correct.
This is correct because regular expressions are a powerful tool for searching and filtering log data for specific patterns, such as domains or file hashes.
C. Incorrect.
This is incorrect because establishing a connection to the PX Grid platform is unrelated to parsing or searching logs from Cisco Secure Endpoint or Cisco Umbrella.
D. Correct.
This is correct because storing parsed logs in structured formats like JSON or CSV allows for easier analysis and reporting.
E. Incorrect.
This is incorrect because Bash is not used in this scenario. The task explicitly involves using Python to parse and search logs from Cisco Secure Endpoint and Cisco Umbrella.

300-215 Question 102

Single answer

You are investigating a potential data exfiltration event and need to parse logs from Cisco Secure Network Analytics to identify anomalous traffic patterns. Which of the following scripts would correctly parse JSON-formatted logs and filter for traffic originating from a specific IP address range (e.g., 192.168.1.0/24)?

A
A Python script that uses the 'json' module to load log data and filters entries based on the source IP field matching the specified range.
B
A Bash script using 'grep' to search for the IP range in the raw log files without any additional filtering.
C
A PowerShell script that uses 'ConvertFrom-Json' to parse log data and filters the source IP field using a regular expression.
D
A Python script that uses 'os' module to scan log files for any mention of the IP range, but does not parse the JSON format.

Show answer and explanation

Correct answer: A

Explanation

The correct approach to parsing JSON-formatted logs is to use a Python script with the 'json' module, as it allows structured data handling and precise filtering based on fields like source IP. While other tools like Bash and PowerShell can work with JSON to some extent, they are either less efficient or do not provide the necessary structure for accurate analysis in this scenario.

A. Correct.
This is the correct answer. Using the Python 'json' module allows proper parsing of JSON-formatted logs, and filtering can be done programmatically to match the IP range.
B. Incorrect.
While 'grep' can search for text, it cannot fully parse JSON-formatted logs, which can lead to inaccurate or incomplete filtering of the data.
C. Incorrect.
Although PowerShell's 'ConvertFrom-Json' is capable of parsing JSON, using a regular expression for IP filtering is less efficient and prone to errors compared to Python's built-in tools for handling IP ranges.
D. Incorrect.
The 'os' module in Python is not intended for parsing JSON data. Using it to search for text in log files without parsing the JSON format would result in incomplete or incorrect analysis.

300-215 Question 103

Select 2

You are tasked with investigating a potential security incident involving unusual DNS activity. You need to parse and search through logs collected from Cisco Umbrella to identify domains accessed by a specific IP address within the last 24 hours. Which of the following Python script snippets would achieve this task?

A
import json

with open('umbrella_logs.json') as file: logs = json.load(file)

results = [entry for entry in logs if entry['client_ip'] == '192.168.1.10' and entry['timestamp'] >= '2023-10-10T00:00:00'] print(results)
B
import csv

with open('umbrella_logs.csv') as file: reader = csv.DictReader(file) results = [] for row in reader: if row['client_ip'] == '192.168.1.10' and row['timestamp'] >= '2023-10-10T00:00:00': results.append(row) print(results)
C
import os os.system('grep "192.168.1.10" umbrella_logs.json | grep "2023-10-10"')
D
import json

with open('umbrella_logs.json') as file: logs = json.load(file)

results = [entry['domain'] for entry in logs if entry['client_ip'] == '192.168.1.10'] print(results)

Show answer and explanation

Correct answers: A, B

Explanation

To parse and search Cisco Umbrella logs, it is important to use structured data parsing methods such as JSON or CSV libraries in Python. The first two scripts correctly use these libraries to filter logs based on both the IP address and the timestamp, meeting the requirements of the task. The grep command and the fourth script are either incomplete or unsuitable for structured log analysis in this scenario.

A. Correct.
This Python script correctly parses a JSON log file and filters for entries matching the specified IP address and timestamp range. This approach is valid for JSON-based logs.
B. Correct.
This Python script correctly parses a CSV log file and filters for entries matching the specified IP address and timestamp range. This approach is valid for CSV-based logs.
C. Incorrect.
While this command might filter some results, using grep does not account for structured data parsing, such as nested fields or timestamp comparisons, which makes it unreliable for forensic log analysis.
D. Incorrect.
This script extracts domains accessed by the IP address but does not filter based on the timestamp. It does not meet the requirement of identifying logs within the last 24 hours.

300-215 Question 104

Select 4

You are investigating a potential data breach and need to analyze DNS logs from Cisco Umbrella and endpoint logs from Cisco Secure Endpoint. You have been tasked with writing a Python script to identify instances where a suspicious domain (e.g., 'malicious-domain.com') has been accessed by endpoints within the last 24 hours. Which of the following script components are critical for achieving this task?

A
Use the Cisco Umbrella API to fetch DNS logs and parse them for 'malicious-domain.com'.
B
Write a function to authenticate and query Cisco Secure Endpoint for endpoint activity logs.
C
Implement a loop to cross-reference DNS logs with endpoint activity timestamps.
D
Manually download and inspect log files from both Cisco Umbrella and Cisco Secure Endpoint.
E
Use a regular expression to search for 'malicious-domain.com' in the fetched logs.

Show answer and explanation

Correct answers: A, B, C, E

Explanation

To effectively identify suspicious activity related to 'malicious-domain.com', you need to automate the retrieval and analysis of logs using the APIs provided by Cisco Umbrella and Cisco Secure Endpoint. Additionally, using techniques like cross-referencing logs and searching with regular expressions ensures the investigation is thorough and precise. Manual inspection of logs is not practical for professional incident response workflows.

A. Correct.
This is correct because utilizing the Cisco Umbrella API allows automated retrieval of DNS logs, which is crucial for analyzing access to 'malicious-domain.com'.
B. Correct.
This is correct because querying Cisco Secure Endpoint for endpoint activity logs ensures that the investigation covers endpoint behavior in addition to DNS activity.
C. Correct.
This is correct because cross-referencing logs is necessary to correlate DNS activity with specific endpoint actions, helping to identify which endpoints accessed the domain.
D. Incorrect.
This is incorrect because manually downloading and inspecting log files is inefficient and not scalable for real-time analysis or large datasets.
E. Correct.
This is correct because a regular expression can efficiently search for the specific domain ('malicious-domain.com') within the fetched logs.

300-215 Question 105

Single answer

During a forensic investigation, you are tasked with analyzing a memory dump from a compromised system suspected of running malicious processes and hiding artifacts. Which tool or set of tools would be most appropriate to use for this scenario, and why?

A
Volatility
B
Sysinternals
C
TCPdump
D
SIFT tools

Show answer and explanation

Correct answer: A

Explanation

Volatility is the most appropriate tool for analyzing memory dumps due to its specialization in memory forensics. It provides detailed insights into processes, registry keys, and other memory artifacts that are critical for identifying malicious activities in a memory dump. Other tools like Sysinternals, TCPdump, and SIFT have their own specialized purposes, but they are not as effective or applicable for memory analysis in this scenario.

A. Correct.
Volatility is a powerful memory forensics framework designed specifically for analyzing memory dumps. It can identify malicious processes, hidden artifacts, and other anomalies in memory, making it the best choice for this scenario.
B. Incorrect.
Sysinternals is a suite of tools for live system analysis and troubleshooting, but it is not designed for analyzing memory dumps. While it can be useful for investigating running processes on a live system, it is not applicable in this specific situation.
C. Incorrect.
TCPdump is a command-line packet analysis tool used for capturing and inspecting network traffic. It is not relevant to analyzing memory dumps.
D. Incorrect.
SIFT tools are a comprehensive forensic toolkit useful for disk and file analysis as well as other forensic tasks. However, while it includes a variety of tools, it is not specialized for memory dump analysis like Volatility.

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300-215 practice questions 101 to 200 of 228

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