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最新の更新312-50v13試験感想 &検証するECCouncil認定トレーニング -素敵なECCouncil Certified Ethical Hacker Exam (CEHv13)

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>> 312-50v13試験感想 <<

312-50v13最速合格、312-50v13模擬体験

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ECCouncil Certified Ethical Hacker Exam (CEHv13) 認定 312-50v13 試験問題 (Q261-Q266):

質問 # 261
An ethical hacker is hired to evaluate the defenses of an organization's database system which is known to employ a signature-based IDS. The hacker knows that some SQL Injection evasion techniques may allow him to bypass the system's signatures. During the operation, he successfully retrieved a list of usernames from the database without triggering an alarm by employing an advanced evasion technique. Which of the following could he have used?

A. Manipulating white spaces in SQL queries to bypass signature detection
B. Utilizing the char encoding function to convert hexadecimal and decimal values into characters that pass-through SQL engine parsing
C. Implementing sophisticated matches such as "OR 'john' = john" in place of classical matches like "OR
1-1"
D. Using the URL encoding method to replace characters with their ASCII codes in hexadecimal form

正解：A

解説：
The hacker could have used the technique of manipulating white spaces in SQL queries to bypass signature detection. This technique involves inserting, removing, or replacing white spaces in SQL queries with other characters or symbols that are either ignored or interpreted as white spaces by the SQL engine, but not by the signature-based IDS. This way, the hacker can alter the appearance of the query and evade the pattern matching of the IDS, while preserving the functionality and logic of the query. For example, the hacker could replace the space character with a tab character, a newline character, a comment symbol, or a URL-encoded value, such as %2012.
The other options are not correct for the following reasons:
* A. Utilizing the char encoding function to convert hexadecimal and decimal values into characters that pass-through SQL engine parsing: This option is not feasible because the char encoding function is not supported by all SQL engines, and it may not be able to convert all hexadecimal and decimal values into valid characters. Moreover, the char encoding function may not be able to bypass the signature detection of the IDS, as it may still match the keywords or syntax of the SQL query3.
* B. Using the URL encoding method to replace characters with their ASCII codes in hexadecimal form:
This option is not effective because the URL encoding method is not applicable to SQL queries, as it is designed for encoding special characters in URLs. The URL encoding method may not be able to replace all characters with their ASCII codes, and it may not be able to preserve the functionality and logic of the SQL query. Furthermore, the URL encoding method may not be able to evade the signature detection of the IDS, as it may still match the keywords or syntax of the SQL query4.
* C. Implementing sophisticated matches such as "OR 'john' = john" in place of classical matches like
"OR 1-1": This option is not advanced because it is a common and basic SQL injection technique that does not involve any evasion or obfuscation. This technique involves injecting a logical expression that is always true, such as "OR 'john' = john" or "OR 1-1", to bypass the authentication or authorization checks of the SQL query. However, this technique may not be able to bypass the signature detection of the IDS, as it may easily match the keywords or syntax of the SQL query.
References:
* 1: SQL Injection Evasion Detection - F5
* 2: Mastering SQL Injection with SQLmap: A Comprehensive Evasion Techniques Cheatsheet
* 3: SQL Injection Prevention - OWASP Cheat Sheet Series
* 4: URL Encoding - W3Schools
* : SQL Injection - OWASP Foundation

質問 # 262
Stephen, an attacker, targeted the industrial control systems of an organization. He generated a fraudulent email with a malicious attachment and sent it to employees of the target organization. An employee who manages the sales software of the operational plant opened the fraudulent email and clicked on the malicious attachment. This resulted in the malicious attachment being downloaded and malware being injected into the sales software maintained in the victim's system. Further, the malware propagated itself to other networked systems, finally damaging the industrial automation components.
What is the attack technique used by Stephen to damage the industrial systems?

A. HMI-based attack
B. Spear-phishing attack
C. SMiShing attack
D. Reconnaissance attack

正解：B

解説：
In CEH v13 Module 09: Social Engineering, spear-phishing is described as a targeted email-based attack in which malicious actors craft highly personalized emails to specific individuals within an organization.
Characteristics from the scenario:
The attacker sends a fraudulent email to an employee.
The email contains a malicious attachment.
Once opened, malware is installed, targeting ICS/SCADA components.
The attack spreads and ultimately damages industrial systems.
This is a classic spear-phishing attack used as the initial infection vector in Advanced Persistent Threats (APT) targeting industrial control systems.
Why Others Are Incorrect:
B). SMiShing: SMS-based phishing; not email-related.
C). Reconnaissance: Pre-attack information gathering, not execution.
D). HMI-based attack: Targets Human-Machine Interface devices, but that's not how the attack started here.
Reference:
Module 09 - Social Engineering # Spear Phishing in Critical Infrastructure CEH iLabs: ICS Infection via Spear Phishing Simulation

質問 # 263
An attacker, using a rogue wireless AP, performed an MITM attack and injected an HTML code to embed a malicious applet in all HTTP connections. When users accessed any page, the applet ran and exploited many machines. Which one of the following tools the hacker probably used to inject HTML code?

A. Wireshark
B. Aircrack-ng
C. Ettercap
D. Tcpdump

正解：C

解説：
Ettercap is a comprehensive MITM attack tool that supports live traffic interception and content injection. It can modify HTTP streams in real time and inject malicious payloads, such as JavaScript or applets, into web traffic.
Reference - CEH v13 Official Study Guide:
Module 8: Sniffing
Quote:
"Ettercap allows attackers to intercept, analyze, and alter data on the fly, including injecting malicious content like Java applets in HTTP sessions during MITM attacks." Incorrect Options Explained:
A & D. Wireshark and Tcpdump are passive sniffers with no injection capability.
C). Aircrack-ng is for Wi-Fi key cracking, not traffic manipulation.

質問 # 264
Gavin owns a white-hat firm and is performing a website security audit for one of his clients. He begins by running a scan which looks for common misconfigurations and outdated software versions. Which of the following tools is he most likely using?

A. Nmap
B. Metasploit
C. Armitage
D. Nikto

正解：A

質問 # 265
Attacker Simon targeted the communication network of an organization and disabled the security controls of NetNTLMvl by modifying the values of LMCompatibilityLevel, NTLMMinClientSec, and RestrictSendingNTLMTraffic. He then extracted all the non-network logon tokens from all the active processes to masquerade as a legitimate user to launch further attacks. What is the type of attack performed by Simon?

A. Internal monologue attack
B. Dictionary attack
C. Combinator attack
D. Rainbow table attack

正解：A

解説：
Types of Password Attacks - Active Online Attacks: Internal Monologue Attack Attackers perform an internal monologue(##) attack using SSPI (Security Support Provider Interface) from a user-mode application, where a local procedure call to the NTLM authentication package is invoked to calculate the NetNTLM response in the context of the logged-on user.Attacker disables the security controls of NetNTLMv1, extracts all the non- network logon tokens from all the active processes to masquerade as legitimate users. (P.594/578)

質問 # 266
......

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