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The Conducting Forensic Analysis & Incident Response Using Cisco Technologies for CyberOps certification demonstrates that the candidate has the expertise to handle advanced cybersecurity threats and incidents, and can effectively use Cisco technologies to analyze and respond to them. It is recognized globally and is highly valued by organizations looking for professionals with advanced cybersecurity skills. Cisco 300-215 Certification holders are equipped with the necessary knowledge and skills to provide critical support to organizations in their cybersecurity operations.
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Refer to the exhibit.
What should an engineer determine from this Wireshark capture of suspicious network traffic?
A. There are signs of a malformed packet attack, and the engineer should limit the packet size and set a threshold of bytes as a countermeasure.
B. There are signs of SYN flood attack, and the engineer should increase the backlog and recycle the oldest half-open TCP connections.
C. There are signs of ARP spoofing, and the engineer should use Static ARP entries and IP address-to- MAC address mappings as a countermeasure.
D. There are signs of a DNS attack, and the engineer should hide the BIND version and restrict zone transfers as a countermeasure.
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 aSYN 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.
Thecountermeasurefor this scenario, as highlighted in theCyberOps Technologies (CBRFIR) 300-215 study guideunderNetwork-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 # 105
A company had a recent data leak incident. A security engineer investigating the incident discovered that a malicious link was accessed by multiple employees. Further investigation revealed targeted phishing attack attempts on macOS systems, which led to backdoor installations and data compromise. Which two security solutions should a security engineer recommend to mitigate similar attacks in the future? (Choose two.)
A. intrusion prevention system
B. endpoint detection and response
C. data loss prevention
D. web application firewall
E. secure email gateway
Answer: B,E
Explanation:
Comprehensive and Detailed Explanation:
* Endpoint Detection and Response (EDR) tools provide behavioral analytics and continuous monitoring to detect malware such as backdoors, which is especially critical on endpoints like macOS devices.
These tools are essential to detect post-compromise activities and contain threats before they spread.
* Secure Email Gateway (e.g., Cisco ESA) plays a key role in blocking phishing emails-the initial vector in this attack. It uses filters and reputation analysis to prevent malicious links or attachments from reaching end users.
Incorrect Options:
* C. DLP focuses on preventing data exfiltration, not phishing prevention or backdoor detection.
* D. IPS is effective for known signature-based threats but less effective against phishing links and endpoint-level backdoors.
* E. WAF protects web servers, not end-user devices from phishing or backdoor infections.
Therefore, the correct answers are: A and B.
NEW QUESTION # 106
What are YARA rules based upon?
A. network artifacts
B. HTML code
C. IP addresses
D. binary patterns
Answer: D
Explanation:
YARA rulesare primarily used for malware classification and detection based onbinary pattern matchingwithin files. They describe sequences of bytes, strings, and other file characteristics found in malicious binaries.
The Cisco CyberOps Associate guide explains:"YARA rules operate by inspecting binary data using conditions and string matches to identify specific patterns that indicate known malware samples.".
NEW QUESTION # 107
A security team received reports of users receiving emails linked to external or unknown URLs that are non-returnable and non-deliverable. The ISP also reported a 500% increase in the amount of ingress and egress email traffic received. After detecting the problem, the security team moves to the recovery phase in their incident response plan. Which two actions should be taken in the recovery phase of this incident?
(Choose two.)
A. request packet capture
B. remove vulnerabilities
C. collect logs
D. verify the breadth of the attack
E. scan hosts with updated signatures
Answer: B,E
NEW QUESTION # 108
Which magic byte indicates that an analyzed file is a pdf file?
A. 0
B. cGRmZmlsZQ
C. 255044462d
D. 0a0ah4cg
Answer: C
NEW QUESTION # 109
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