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Prerequisites
The potential candidates for this certification test must complete the eligibility requirements before taking it. They must take the official CEH training course before they can attempt the exam. Alternatively, the interested individuals with at least two years of work experience in the domain of information security can complete an eligibility form with proof of their expertise. They are required to submit this form and pay the eligibility application fee of $100 before they can be allowed to register for the test.
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EC-COUNCIL Certified Ethical Hacker Exam (CEH v11) Sample Questions (Q430-Q435):
NEW QUESTION # 430
Robin, a professional hacker, targeted an organization's network to sniff all the traffic. During this process.
Robin plugged in a rogue switch to an unused port in the LAN with a priority lower than any other switch in the network so that he could make it a root bridge that will later allow him to sniff all the traffic in the network.
What is the attack performed by Robin in the above scenario?
- A. STP attack
- B. VLAN hopping attack
- C. ARP spoofing attack
- D. DNS poisoning attack
Answer: D
Explanation:
Domain Name Server (DNS) spoofing (a.k.a. DNS cache poisoning) is an attack in which altered DNS records are used to redirect online traffic to a fraudulent website that resembles its intended destination.
Once there, users are prompted to login into (what they believe to be) their account, giving the perpetrator the opportunity to steal their access credentials and other types of sensitive information. Furthermore, the malicious website is often used to install worms or viruses on a user's computer, giving the perpetrator long-term access to it and the data it stores.
Methods for executing a DNS spoofing attack include:
Man in the middle (MITM)- The interception of communications between users and a DNS server in order to route users to a different/malicious IP address.
DNS server compromise- The direct hijacking of a DNS server, which is configured to return a malicious IP address.
DNS cache poisoning example
The following example illustrates a DNS cache poisoning attack, in which an attacker (IP 192.168.3.300) intercepts a communication channel between a client (IP 192.168.1.100) and a server computer belonging to the website www.estores.com (IP 192.168.2.200).
In this scenario, a tool (e.g., arpspoof) is used to dupe the client into thinking that the server IP is 192.168.3.300. At the same time, the server is made to think that the client's IP is also 192.168.3.300.
Such a scenario would proceed as follows:
The attacker uses arpspoof to issue the command: arpspoof 192.168.1.100 192.168.2.200. This modifies the MAC addresses in the server's ARP table, causing it to think that the attacker's computer belongs to the client.
The attacker once again uses arpspoof to issue the command: arpspoof 192.168.2.200 192.168.1.100, which tells the client that the perpetrator's computer is the server.
The attacker issues the Linux command: echo 1> /proc/sys/net/ipv4/ip_forward. As a result, IP packets sent between the client and server are forwarded to the perpetrator's computer.
The host file, 192.168.3.300 estores.com is created on the attacker's local computer, which maps the website www.estores.com to their local IP.
The perpetrator sets up a web server on the local computer's IP and creates a fake website made to resemble www.estores.com.
Finally, a tool (e.g., dnsspoof) is used to direct all DNS requests to the perpetrator's local host file. The fake website is displayed to users as a result and, only by interacting with the site, malware is installed on their computers.
NEW QUESTION # 431
Josh has finished scanning a network and has discovered multiple vulnerable services. He knows that several of these usually have protections against external sources but are frequently susceptible to internal users. He decides to draft an email, spoof the sender as the internal IT team, and attach a malicious file disguised as a financial spreadsheet. Before Josh sends the email, he decides to investigate other methods of getting the file onto the system. For this particular attempt, what was the last stage of the cyber kill chain that Josh performed?
- A. Reconnaissance
- B. Weaponization
- C. Exploitation
- D. Delivery
Answer: A
NEW QUESTION # 432
What is a "Collision attack" in cryptography?
- A. Collision attacks try to break the hash into two parts, with the same bytes in each part to get the private key
- B. Collision attacks try to break the hash into three parts to get the plaintext value
- C. Collision attacks try to get the public key
- D. Collision attacks try to find two inputs producing the same hash
Answer: D
NEW QUESTION # 433
Hackers often raise the trust level of a phishing message by modeling the email to look similar to the internal email used by the target company. This includes using logos, formatting, and names of the target company. The phishing message will often use the name of the company CEO, President, or Managers. The time a hacker spends performing research to locate this information about a company is known as?
- A. Reconnaissance
- B. Exploration
- C. Investigation
- D. Enumeration
Answer: A
NEW QUESTION # 434
Richard, an attacker, aimed to hack loT devices connected to a target network. In this process. Richard recorded the frequency required to share information between connected devices. After obtaining the frequency, he captured the original data when commands were initiated by the connected devices. Once the original data were collected, he used free tools such as URH to segregate the command sequence. Subsequently, he started injecting the segregated command sequence on the same frequency into the loT network, which repeats the captured signals of the devices. What Is the type of attack performed by Richard In the above scenario?
- A. CrypTanalysis attack
- B. Replay attack
- C. Reconnaissance attack
Cryptanalysis is that the science of cracking codes and secret writing secrets. it's accustomed violate authentication schemes, to interrupt scientific discipline protocols, and, additional benignantly, to seek out and proper weaknesses in coding algorithms.
It may be employed in IW applications - for instance, shaping Associate in Nursing encrypted signal to be accepted as authentic. Competitors UN agency are ready to discover the key can currently need to use it to their advantage, thus they're going to need to send phony encrypted messages to the supply so as to gain data or gain a bonus. It might even be used to pretend to be the supply so as to send phony data to others, UN agency currently can assume that it came from the official supply.
Among the kinds of attacks are:
Ciphertext solely attacks
best-known plaintext attacks
Chosen plaintext attacks
Chosen ciphertext attacks
Man-in-the-middle attacks
aspect channel attacks
Brute force attacks
Birthday attacks
There are variety of different technical and non-technical cryptography attacks to that systems will fall victim. cryptographical attacks may be mounted not solely against coding algorithms, however conjointly against digital signature algorithms, MACing algorithms and pseudo-random variety generators.
Ciphertext solely Attack
A ciphertext solely attack (COA) could be a case within which solely the encrypted message is accessible for attack, however as a result of the language is thought a frequency analysis may be tried. during this state of affairs the aggressor doesn't apprehend something concerning the contents of the message, and should work from ciphertext solely. - D. Side-channel attack
Answer: A
NEW QUESTION # 435
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