Official 312-50v13 Study Guide - 312-50v13 Most Reliable Questions

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Top Official 312-50v13 Study Guide Pass Certify | Valid 312-50v13 Most Reliable Questions: Certified Ethical Hacker Exam (CEHv13)

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ECCouncil Certified Ethical Hacker Exam (CEHv13) Sample Questions (Q127-Q132):

NEW QUESTION # 127
You must map open ports and services while remaining stealthy and avoiding IDS detection. Which scanning technique is best?

Answer: A

Explanation:
The TCP SYN scan, also known as a Stealth Scan, is emphasized in CEH v13 Network Scanning as the most effective balance between accuracy and stealth. It sends a SYN packet and analyzes the response without completing the TCP handshake.
Because the connection is never fully established, SYN scans are less likely to be logged by applications and are harder for IDS systems to detect compared to TCP Connect scans.
FIN and ACK scans are used for firewall rule mapping and evasion, but they do not reliably enumerate services. TCP Connect scans are noisy and easily detected. Therefore, Stealth (SYN) Scan is the best choice.


NEW QUESTION # 128
Peter extracts the SIDs list from a Windows 2000 Server machine using the hacking tool "SIDExtractor".
Here is the output of the SIDs:

[Image showing multiple user accounts with their Security Identifiers (SIDs)] From the above list identify the user account with System Administrator privileges.

Answer: A

Explanation:
In a Windows system, a Security Identifier (SID) uniquely identifies each user and group. The SID format is:
S-1-5-21-<domain or machine ID>-<RID>
The Relative Identifier (RID) is the last component in the SID string.
According to Microsoft and CEH v13:
RID 500 # Built-in Administrator account
RID 501 # Guest account
RIDs > 1000 # Regular user accounts
In the given image, the SID:
s-1-5-21-1125394485-807628933-54978560-500chang
has a RID of 500, indicating the built-in administrator account.
From CEH v13:
Module 4: Enumeration
Topic: SID Enumeration
CEH v13 States:
"When enumerating Windows systems, the account with RID 500 is always the default Administrator account, unless renamed. Attackers often target this account due to its elevated privileges." Incorrect Options:
All others have RIDs not equal to 500 (e.g., 100, 652, 412, etc.)
Reference:CEH v13 Study Guide - Module 4: Enumeration # Section: SID Enumeration & Windows Security AccountsMicrosoft Documentation on Well-known SIDs: https://learn.microsoft.com/en-us/windows-server
/identity/ad-ds/manage/understand-security-identifiers
======


NEW QUESTION # 129
The company ABC recently contracts a new accountant. The accountant will be working with the financial statements. Those financial statements need to be approved by the CFO and then they will be sent to the accountant but the CFO is worried because he wants to be sure that the information sent to the accountant was not modified once he approved it. Which of the following options can be useful to ensure the integrity of the data?

Answer: C


NEW QUESTION # 130
What do Trinoo, TFN2k, WinTrinoo, T-Sight, and Stracheldraht have in common?

Answer: D


NEW QUESTION # 131
An ethical hacker is hired to conduct a comprehensive network scan of a large organization that strongly suspects potential intrusions into their internal systems. The hacker decides to employ a combination of scanning tools to obtain a detailed understanding of the network. Which sequence of actions would provide the most comprehensive information about the network's status?

Answer: D

Explanation:
The sequence of actions that would provide the most comprehensive information about the network's status is to use Hping3 for an ICMP ping scan on the entire subnet, then use Nmap for a SYN scan on identified active hosts, and finally use Metasploit to exploit identified vulnerabilities. This sequence of actions works as follows:
Use Hping3 for an ICMP ping scan on the entire subnet: This action is used to discover the active hosts on the network by sending ICMP echo request packets to each possible IP address on the subnet and waiting for ICMP echo reply packets from the hosts. Hping3 is a command-line tool that can craft and send custom packets, such as TCP, UDP, or ICMP, and analyze the responses. By using Hping3 for an ICMP ping scan, the hacker can quickly and efficiently identify the live hosts on the network, as well as their response times and packet loss rates12.
Use Nmap for a SYN scan on identified active hosts: This action is used to scan the open ports and services on the active hosts by sending TCP SYN packets to a range of ports and analyzing the TCP responses. Nmap is a popular and powerful tool that can perform various types of network scans, such as port scanning, service detection, OS detection, and vulnerability scanning. By using Nmap for a SYN scan, the hacker can determine the state of the ports on the active hosts, such as open, closed, filtered, or unfiltered, as well as the services and protocols running on them. A SYN scan is also known as a stealth scan, as it does not complete the TCP three-way handshake and thus avoids logging on the target system34.
Use Metasploit to exploit identified vulnerabilities: This action is used to exploit the vulnerabilities on the active hosts by using pre-built or custom modules that leverage the open ports and services. Metasploit is a framework that contains a collection of tools and modules for penetration testing and exploitation. By using Metasploit, the hacker can launch various attacks on the active hosts, such as remote code execution, privilege escalation, or backdoor installation, and gain access to the target system or data. Metasploit can also be used to perform post-exploitation tasks, such as gathering information, maintaining persistence, or pivoting to other systems .
The other options are not as comprehensive as option B for the following reasons:
A). Initiate with Nmap for a ping sweep, then use Metasploit to scan for open ports and services, and finally use Hping3 to perform remote OS fingerprinting: This option is not optimal because it does not use the tools in the most efficient and effective way. Nmap can perform a ping sweep, but it is slower and less flexible than Hping3, which can craft and send custom packets. Metasploit can scan for open ports and services, but it is more suitable for exploitation than scanning, and it relies on Nmap for port scanning anyway. Hping3 can perform remote OS fingerprinting, but it is less accurate and reliable than Nmap, which can use various techniques and probes to determine the OS type and version13 .
C). Start with Hping3 for a UDP scan on random ports, then use Nmap for a version detection scan, and finally use Metasploit to exploit detected vulnerabilities: This option is not effective because it does not use the best scanning methods and techniques. Hping3 can perform a UDP scan, but it is slower and less reliable than a TCP scan, as UDP is a connectionless protocol that does not always generate responses. Scanning random ports is also inefficient and incomplete, as it may miss important ports or services. Nmap can perform a version detection scan, but it is more useful to perform a port scan first, as it can narrow down the scope and speed up the scan. Metasploit can exploit detected vulnerabilities, but it is not clear how the hacker can identify the vulnerabilities without performing a vulnerability scan first13 .
D). Begin with NetScanTools Pro for a general network scan, then use Nmap for OS detection and version detection, and finally perform an SYN flooding with Hping3: This option is not comprehensive because it does not cover all the aspects and objectives of a network scan. NetScanTools Pro is a graphical tool that can perform various network tasks, such as ping, traceroute, DNS lookup, or port scan, but it is less powerful and versatile than Nmap or Hping3, which can perform more advanced and customized scans. Nmap can perform OS detection and version detection, but it is more useful to perform a port scan first, as it can provide more information and insights into the target system. Performing an SYN flooding with Hping3 is not a network scan, but a denial-of-service attack, which can disrupt the network and alert the target system, and it is not an ethical or legal action for a hired hacker13 .
References:
1: Hping - Wikipedia
2: Hping3 Examples - NetworkProGuide
3: Nmap - Wikipedia
4: Nmap Tutorial: From Discovery to Exploits - Part 1: Introduction to Nmap | HackerTarget.com
5: Metasploit Project - Wikipedia
6: Metasploit Unleashed - Offensive Security
7: NetScanTools Pro - Northwest Performance Software, Inc.


NEW QUESTION # 132
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