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| Section | Objectives |
|---|---|
| Topic 1: Security Monitoring and Cisco Technologies | - Log correlation and SIEM concepts - Cisco Secure Network Analytics (Stealthwatch) - Cisco Secure Endpoint (AMP) usage |
| Topic 2: Endpoint and Malware Analysis | - Endpoint telemetry analysis - Malware behavior identification - Use of Cisco endpoint security technologies |
| Topic 3: Network Forensics and Traffic Analysis | - Network flow analysis using Cisco tools - Packet capture and analysis - Identifying malicious traffic patterns |
| Topic 4: Digital Forensics Fundamentals | - Disk and memory forensics concepts - Evidence handling and chain of custody - Forensic data acquisition techniques |
| Topic 5: Incident Response Process | - Containment, eradication, and recovery procedures - Preparation and readiness for security incidents - Incident identification and triage |
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NEW QUESTION # 106
Refer to the exhibit. What is the result of this Bash script?
#!/bin/bash
logfile1=/var/log/messages
logfile2=/var/log/secure
mydatexpr=`date +%b\ %d`
for log in $logfile{1,2}
do
echo $log BEGIN
egrep " $mydatexpr " $log
echo $log END
done
Answer: A
Explanation:
The command substitution assigns mydatexpr the current month abbreviation and day, matching the date prefix commonly used in /var/log/messages and /var/log/secure. The for loop processes both files. For each one, the script prints a BEGIN marker, uses egrep to return lines containing that date expression, and then prints an END marker. It therefore searches the two logs for entries from a particular date. It does not parse individual timestamp fields or sort records, so option B overstates its behavior. No content is appended to either log, eliminating option C, and the script does not rewrite timestamps or alter the logs, eliminating option D. This is the kind of shell-based log searching covered by CBRFIR Forensics Techniques objective
2.5, which requires constructing Bash, Python, and PowerShell scripts to parse and search log sources. Cisco CBRFIR v1.2 exam topics
NEW QUESTION # 107
Refer to the exhibit.
What should an engineer determine from this Wireshark capture of suspicious network traffic?
Answer: B
Explanation:
In the provided Wireshark capture, we see multiple TCP SYN packets being sent from different source IP addresses to the same destination IP address (192.168.1.159:80) within a short time window. These SYN packets do not show a corresponding SYN-ACK or ACK response, indicating that these TCP connection requests are not being completed.
This pattern is indicative of a SYN flood attack, a type of Denial of Service (DoS) attack. In this attack, a malicious actor floods the target system with a high volume of TCP SYN requests, leaving the target ' s TCP connection queue (backlog) filled with half-open connections. This can exhaust system resources, causing legitimate connection requests to be denied or delayed.
The countermeasure for this scenario, as highlighted in the CyberOps Technologies (CBRFIR) 300-215 study guide under Network-Based Attacks and TCP SYN Flood Attacks, involves:
Increasing the backlog queue: This allows the server to hold more half-open connections.
Recycling the oldest half-open connections: This ensures that legitimate connections have a chance to be established if the backlog fills up.
Reference: CyberOps Technologies (CBRFIR) 300-215 study guide, Chapter 5: Identifying Attack Methods, SYN Flood Attack section, page 146-148.
NEW QUESTION # 108
Refer to the exhibit.
A security analyst notices unusual connections while monitoring traffic. What is the attack vector, and which action should be taken to prevent this type of event?
Answer: B
Explanation:
The exhibit shows multipleARP reply packetswith the same IP addresses (192.168.51.105and192.
168.51.201) being mapped todifferent MAC addresses, which triggers the message: "duplicate use of [IP] detected". This is a strong indicator of anARP spoofing(or poisoning) attack.
ARP spoofing occurs when a malicious actor sends falsified ARP messages to associate their MAC address with the IP address of another host. This misleads other devices on the network and allows interception or redirection of traffic.
The Cisco CyberOps Associate guide specifically recommendsconfiguring port securityon switches as a method tomitigate ARP spoofing, by limiting the number of MAC addresses allowed per port or statically assigning legitimate MAC addresses to switch ports.
NEW QUESTION # 109
What can the blue team achieve by using Hex Fiend against a piece of malware?
Answer: C
Explanation:
Hex Fiend is a hex editor that allows analysts to examine the raw byte content of files. One key use case is identifying and extracting byte-level patterns or signatures that can be translated into YARA rules for detecting malware. These hex patterns can be used to define precise signature-based detections.
NEW QUESTION # 110
Refer to the exhibit.
What is the indicator of compromise?
Answer: A
Explanation:
The STIX data structure shows a pattern field with this entry:
file:hashes.'SHA-256' = '3299f07bc0711b3587fe8a1c6bf3ee6cbcc14cb775f64b28a61d72ebcb8968d3' This value is a SHA-256 file hash, a well-known indicator of compromise (IoC) for identifying malicious files.
Therefore, the correct answer is:
A). SHA256 file hash.
NEW QUESTION # 111
......
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