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| Section | Weight | Objectives |
|---|---|---|
| Fundamentals | 20% | - Network infrastructure device forensics - Evidence collection in virtualized environments - Root cause analysis reporting components - Antiforensic tactics, techniques, and procedures - Encoding and obfuscation techniques - YARA rules for malware identification and classification |
| Forensics Processes | 15% | - Data acquisition: memory, disk, network - Evidence handling and chain of custody - Antiforensic techniques: debugging, geolocation, obfuscation - Legal and compliance considerations |
| 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 - Script analysis (Python, PowerShell, Bash) for log processing - Host-based evidence location and collection |
| Malware Analysis | 15% | - Reverse engineering principles - Static and dynamic malware analysis - Malware family and campaign identification - Malware classification and behavior analysis |
| Incident Response Techniques | 30% | - Post-incident analysis and improvement actions - Response to zero-day exploits and vulnerabilities - Attack vector analysis and mitigation recommendations - Correlating host and network activity data - Threat intelligence interpretation: IOCs, IOAs, actor profiling - Cisco security solutions for detection and prevention - Interpreting alerts from SIEM, IDS/IPS, syslog |
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質問 # 104 
正解：A
解説：
The string in the exhibit is a classic example of Base64 encoding. Base64 is used to encode binary data into ASCII characters, making it suitable for transmitting data over media that are designed to deal with textual data. It typically ends with one or two equal signs = (padding), which this string does. This format is commonly seen in obfuscated payloads or malware communications in the wild.
質問 # 105
Refer to the exhibit.
According to the Wireshark output, what are two indicators of compromise for detecting an Emotet malware download? (Choose two.)
正解：C、E
質問 # 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
正解：D
解説：
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
質問 # 107
A threat actor attempts to avoid detection by turning data into a code that shifts numbers to the right four times. Which anti-forensics technique is being used?
正解：A
解説：
This scenario describes asubstitution cipher, where data is made unreadable or less recognizable without altering its functionality. According to the Cisco CyberOps Associate guide, obfuscation includes techniques such as shifting, encoding, and symbol manipulation to mask the true nature of data or code:
"A very well-known cipher, the Caesar cipher... shifts the letter of the alphabet by a fixed number... This technique is a form of data obfuscation used to bypass detection mechanisms.".
質問 # 108
Which information is provided about the object file by the "-h" option in the objdump line commandobjdump
-b oasys -m vax -h fu.o?
正解：A
解説：
The-hoption in theobjdumpcommand displayssection headersof an object file. According to general usage and command-line documentation, and also explained in digital forensics tools discussions in the CyberOps course, the header information includes details about the name, size, VMA, LMA, file offset, and alignment of each section in the object file. This helps analysts understand how data is stored and organized within compiled files during forensic examinations.
質問 # 109
......
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