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| Section | Weight | Objectives |
|---|---|---|
| Forensics Techniques | 20% | - Identifying Indicators of Compromise (IOC) from tools output - MITRE ATT&CK framework for fileless malware analysis - Forensic tools: Volatility, Sysinternals, SIFT, TCPdump - Host-based evidence location and collection - Script analysis (Python, PowerShell, Bash) for log processing |
| Malware Analysis | 15% | - Reverse engineering principles - Malware classification and behavior analysis - Static and dynamic malware analysis - Malware family and campaign identification |
| Forensics Processes | 15% | - Evidence handling and chain of custody - Legal and compliance considerations - Antiforensic techniques: debugging, geolocation, obfuscation - Data acquisition: memory, disk, network |
| Fundamentals | 20% | - Evidence collection in virtualized environments - Antiforensic tactics, techniques, and procedures - Network infrastructure device forensics - Root cause analysis reporting components - Encoding and obfuscation techniques - YARA rules for malware identification and classification |
| Incident Response Techniques | 30% | - Correlating host and network activity data - Post-incident analysis and improvement actions - Interpreting alerts from SIEM, IDS/IPS, syslog - Cisco security solutions for detection and prevention - Threat intelligence interpretation: IOCs, IOAs, actor profiling - Attack vector analysis and mitigation recommendations - Response to zero-day exploits and vulnerabilities |
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問題 #156
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?
答案：D
解題說明：
The exhibit shows multiple ARP reply packets with the same IP addresses (192.168.51.105 and
192.168.51.201) being mapped to different MAC addresses, which triggers the message: "duplicate use of
[IP] detected". This is a strong indicator of an ARP 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 recommends configuring port security on switches as a method to mitigate ARP spoofing, by limiting the number of MAC addresses allowed per port or statically assigning legitimate MAC addresses to switch ports.
問題 #157
During a daily audit using Cisco Secure Network Analytics, suspicious SMB port-scanning activity is detected from an executive workstation. Investigation determines that an unknown USB drive, delivered through regular mail, was connected to the workstation. The drive contained a file named gift cards.pdf, which was executed. Dynamic malware analysis was performed in a sandbox, but no malicious behavior was identified. Which two steps should be taken to evaluate further whether the file is malicious? (Choose two.)
答案：D,E
解題說明：
A clean sandbox result does not establish that the PDF is safe. Malicious behavior may require user interaction, a specific application version, network access, elapsed time, or environmental conditions, and malware can detect sandboxes. Static analysis examines the PDF structure without executing it, including embedded JavaScript, launch actions, URLs, attachments, malformed objects, and exploit indicators. A multiengine antivirus scanner adds independent signature, reputation, and detection- engine verdicts, increasing the chance of identifying a known or variant threat missed by one product.
These complementary actions make A and D correct under CBRFIR objectives 4.4 and 5.4, which cover evaluating suspicious files and recommending further endpoint or ad-hoc analysis. Executing the PDF again merely repeats dynamic testing with additional risk. Blocking SMB is a containment measure, not file evaluation, while unspecified heuristic analysis is less definitive than the two concrete workflows.
Cisco documents combined static and dynamic analysis .
問題 #158
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.)
答案：A,E
問題 #159
Refer to the exhibit.
What should be determined from this Apache log?
答案：B
問題 #160
What is the steganography anti-forensics technique?
答案：C
解題說明：
Steganography is the anti-forensics technique of hiding malicious content within seemingly innocent files, such as image, audio, or video files. The goal is to conceal data or code in a way that avoids suspicion and detection, thereby making traditional security inspection tools ineffective unless they are explicitly designed to detect hidden data within media files.
Steganography differs from encryption because it does not simply make data unreadable; it hides the existence of the data itself. It is commonly used in cyber operations to hide command-and-control instructions or to exfiltrate sensitive information in covert ways.
Reference:CyberOps Technologies (CBRFIR) 300-215 study guide, Chapter on Evasion and Obfuscation Techniques, Anti-Forensics, Steganography Section.
問題 #161
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