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| Section | Objectives |
|---|---|
| Advanced Forensics Domains | - Database Forensics - Cloud and IoT Forensics - Mobile Device Forensics |
| Network Forensics | - Network Intrusion Investigation - Packet Analysis and Traffic Reconstruction |
| Web Attack and Email Forensics | - Email Header and Content Analysis - Web Server Attack Investigation |
| Computer Forensics Fundamentals | - Digital Forensics Principles and Process - Legal and Ethical Issues in Forensics |
| Malware and Data Forensics | - Malware Identification and Analysis - Data Recovery Techniques |
| Windows and Linux Forensics | - Linux File System and Log Analysis - Windows Artifacts Analysis |
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質問 # 495
During a live-response investigation on a compromised Ubuntu web server, analysts capture a memory image to examine suspicious behavior observed within a running process. The goal is to identify evidence of anomalous memory regions that may indicate unauthorized code execution within the address space of a specific process. How should investigators use Volatility to locate this type of memory anomaly?
正解：C
解説：
The correct answer is D because malfind is the Volatility plugin specifically intended to locate suspicious memory regions that may contain injected or otherwise unauthorized executable content inside a process address space. Volatility documentation describes malfind as a way to identify hidden or injected code by examining memory protections and suspicious VAD or mapped regions, which is exactly the forensic goal in the question. linux.pslist can enumerate processes, linux.lsof lists open files, and linux.mount shows mount information, but none of those plugins is designed to identify anomalous executable memory regions. CHFI v11 includes Linux memory forensics and malware behavior analysis, so candidates are expected to select the analysis method that directly matches the target artifact. In memory forensics, code injection or unauthorized execution often leaves traces in regions with unusual permissions or content patterns, and malfind is built to surface those anomalies for further review. Because the investigators want to find suspicious in-process memory areas that may reveal unauthorized code execution, the correct Volatility choice is linux.malfind.
質問 # 496
Olivia, a security analyst, is performing a penetration test on a banking website to identify potential vulnerabilities. While reviewing the input fields, she suspects that the site might be vulnerable to SQL injection attacks. During her testing, she observes a URL that seems to have unusual encoding techniques applied to it. One URL stands out, in which the input appears to have been double encoded, potentially to evade detection and bypass filters that prevent SQL injection. Which of the following URLs indicates double encoding to execute an SQL injection attack?
正解：D
解説：
According to the CHFI v11 Web Application Forensics and Network & Web Attacks module, attackers commonly use encoding and obfuscation techniques to bypass input validation mechanisms, web application firewalls (WAFs), and intrusion detection systems. One such advanced technique is double URL encoding, which involves encoding already URL-encoded characters a second time.
In URL encoding, the forward slash / is represented as %2F. When this value is encoded again, % becomes %25, resulting in %252F. In Option A, multiple occurrences of %252f clearly indicate that characters such as / and comment markers (/* */) have been double encoded. When processed by the web server or application, the input may be decoded twice, ultimately reconstructing a valid SQL injection payload like UNION SELECT, thereby bypassing security filters.
質問 # 497
Emily, a system administrator, is tasked with automating the deployment of a custom service on a group of Windows servers in her organization. She has developed a script that will be used to add the new service to each server. The service will run a custom executable file that provides specific functionality for internal applications. To ensure that the service is created correctly, Emily needs to know which SrvMan command she should use to deploy the service to the system. Which of the following SrvMan commands should Emily use to create the new service?
正解：C
解説：
The add command in SrvMan is used to create and install a new Windows service. It allows specifying the service name, display name, and configuration parameters such as startup type and behavior, which are required for deploying a custom service.
質問 # 498
Using Linux to carry out a forensics investigation, what would the following command accomplish?
dd if=/usr/home/partition.image of=/dev/sdb2 bs=4096 conv=notrunc,noerror
正解：A
質問 # 499
In the wake of a cyberattack, a large e-commerce platform experiences widespread system downtime, leading to significant financial losses and tarnished customer trust. As they scramble to regain control, it becomes evident that sensitive customer data has been compromised, posing a threat to data security and the platform's reputation. Amidst the aftermath of the cyberattack on the e-commerce platform, which of the following consequences is not the result of a lack of forensic readiness?
正解：B
解説：
According to the CHFI v11 objectives under Computer Forensics Fundamentals, Forensic Readiness, and Incident Response Integration, forensic readiness refers to an organization's ability to efficiently collect, preserve, analyze, and present digital evidence while minimizing the cost and impact of investigations. A lack of forensic readiness primarily affects how well an organization can respond to, investigate, and legally defend itself after an incident--not whether the incident causes operational disruption.
System downtime (Option B) is a direct operational impact of a cyberattack, such as a DDoS attack, ransomware infection, or system compromise. While poor preparedness may prolong recovery, downtime itself is not caused by the absence of forensic readiness; it is caused by the attack's technical and operational effects. Therefore, system downtime is not a consequence of lacking forensic readiness.
質問 # 500
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