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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Malware Analysis | 15% | - Malware family and campaign identification - Static and dynamic malware analysis - Reverse engineering principles - Malware classification and behavior analysis |
| Topic 2: Forensics Processes | 15% | - Data acquisition: memory, disk, network - Legal and compliance considerations - Antiforensic techniques: debugging, geolocation, obfuscation - Evidence handling and chain of custody |
| Topic 3: Forensics Techniques | 20% | - Identifying Indicators of Compromise (IOC) from tools output - Forensic tools: Volatility, Sysinternals, SIFT, TCPdump - MITRE ATT&CK framework for fileless malware analysis - Script analysis (Python, PowerShell, Bash) for log processing - Host-based evidence location and collection |
| Topic 4: Fundamentals | 20% | - Evidence collection in virtualized environments - Root cause analysis reporting components - Encoding and obfuscation techniques - Network infrastructure device forensics - Antiforensic tactics, techniques, and procedures - YARA rules for malware identification and classification |
| Topic 5: Incident Response Techniques | 30% | - Response to zero-day exploits and vulnerabilities - Post-incident analysis and improvement actions - Correlating host and network activity data - Interpreting alerts from SIEM, IDS/IPS, syslog - Cisco security solutions for detection and prevention - Attack vector analysis and mitigation recommendations - Threat intelligence interpretation: IOCs, IOAs, actor profiling |
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質問 # 122 
multiple machines behave abnormally. A sandbox analysis reveals malware. What must the administrator determine next?
正解：A
解説：
The key goal during lateral movement analysis is to determine whether the malware spread or attempted to spread beyond the initially compromised system. This is crucial for containment and scoping of the incident.
Logs, sandbox behavior, or network activity may show if Patient 0 initiated outbound connections to other systems, potentially propagating malware across the environment.
Correct answer: D. if Patient 0 tried to connect to another workstation.
質問 # 123
A security team detected an above-average amount of inbound tcp/135 connection attempts from unidentified senders. The security team is responding based on their incident response playbook. Which two elements are part of the eradication phase for this incident? (Choose two.)
正解：A、C
解説：
The eradication phase in incident response involves eliminating the root cause of the incident and strengthening defenses to prevent reoccurrence. In this case:
Intrusion Prevention System (D): Adding new rules to the IPS to detect and block malicious activity on TCP
/135 is a direct eradication step to remove the threat's entry point and prevent future attacks.
Centralized User Management (C): Hardening user accounts, removing unnecessary permissions, and applying tighter authentication/authorization measures helps eliminate the possibility that threat actors could exploit weak or mismanaged accounts to continue accessing the system.
Although anti-malware software (A) and enterprise block listing (E) are valuable, the most direct eradication steps here specifically involve managing network access (via IPS) and strengthening user controls (via centralized user management), especially when TCP/135 (MSRPC endpoint mapper) can be used to enumerate services and potentially access vulnerable endpoints remotely.
This aligns with best practices outlined in incident response frameworks (such as the NIST SP 800-61 and referenced resources), which emphasize closing the exploited entry points (in this case, TCP/135) and removing any lingering access points through user management and network control enhancements.
Reference:
CyberOps Technologies (CBRFIR) 300-215 study guide, Chapter: Understanding the Incident Response Process, Eradication Phase, page 105-106.
External Reference: "The Core Phases of Incident Response - Remediation," Cipher blog [1].
External Reference: "Service Overview and Network Port Requirements," Microsoft documentation [2].
質問 # 124
Refer to the exhibit.
A network engineer is analyzing a Wireshark file to determine the HTTP request that caused the initial Ursnif banking Trojan binary to download. Which filter did the engineer apply to sort the Wireshark traffic logs?
正解：D
質問 # 125
Refer to the exhibit.
The application x-dosexec with hash
691c65e4fb1d19f82465df1d34ad51aaeceba14a78167262dc7b2840a6a6aa87 is reported as malicious and labeled as " Trojan.Generic " by the threat intelligence tool. What is considered an indicator of compromise?
正解：C
解説：
Comprehensive and Detailed Explanation:
The exhibit lists several behaviors under categories such as Remote Access, Stealer/Phishing, Persistence, and Evasive Marks. Notably, under "Persistence" it states:
"Writes data to a remote process"
This behavior is indicative of "process injection," a technique where malware writes or injects malicious code into the address space of another process. This allows the malware to evade detection and run within the context of a legitimate process.
This matches the MITRE ATT & CK technique T1055 (Process Injection), which is also discussed in the Cisco CyberOps Associate guide under evasion and persistence tactics used by malware.
While modified registry and data compression are possible signs of malware, they are not explicitly referenced in the exhibit. The definitive indicator shown is related to process injection.
Therefore, the correct answer is: C. process injection.
質問 # 126
Refer to the exhibit.
According to the Wireshark output, what is the Indicator of Attack?
正解：C
解説：
The capture shows one source, 207.86.6.174, sending a rapid sequence of DNS queries to 205.94.14.222. The timestamps progress by roughly 0.04 seconds, producing dozens of requests in little more than one second.
That unusually high request rate is the observable Indicator of Attack; the exhibit does not establish that the queried domains are malicious. Requesting several DNS record types can occur legitimately, so option B is descriptive but not the strongest attack indicator. Option A ignores the abnormal frequency. CBRFIR Forensics Processes objective 4.3 requires analysts to examine traffic associated with malicious activity using network-monitoring tools and Wireshark display analysis. The defensible conclusion must therefore remain tied to what the packet evidence directly proves: a DNS-query burst from a single host, which warrants correlation with baseline, endpoint, and threat-intelligence data. Cisco CBRFIR v1.2 exam topics
質問 # 127
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