Last Updated on July 23, 2021 by InfraExam

312-50 : CEH Certified Ethical Hacker (312-50v9) : Part 28

  1. Tess King is using the nslookup command to craft queries to list all DNS information (such as Name Servers, host names, MX records, CNAME records, glue records (delegation for child Domains), zone serial number, TimeToLive (TTL) records, etc) for a Domain.

    What do you think Tess King is trying to accomplish? Select the best answer.

    • A zone harvesting
    • A zone transfer
    • A zone update
    • A zone estimate
  2. A zone file consists of which of the following Resource Records (RRs)?

    • DNS, NS, AXFR, and MX records
    • DNS, NS, PTR, and MX records
    • SOA, NS, AXFR, and MX records
    • SOA, NS, A, and MX records
  3. Let’s imagine three companies (A, B and C), all competing in a challenging global environment. Company A and B are working together in developing a product that will generate a major competitive advantage for them. Company A has a secure DNS server while company B has a DNS server vulnerable to spoofing. With a spoofing attack on the DNS server of company B, company C gains access to outgoing e-mails from company B. How do you prevent DNS spoofing?

    • Install DNS logger and track vulnerable packets
    • Disable DNS timeouts
    • Install DNS Anti-spoofing
    • Disable DNS Zone Transfer
  4. Which DNS resource record can indicate how long any “DNS poisoning” could last?

    • MX
    • SOA
    • NS
    • TIMEOUT
  5. Joseph was the Web site administrator for the Mason Insurance in New York, who’s main Web site was located at www.masonins.com. Joseph uses his laptop computer regularly to administer the Web site. One night, Joseph received an urgent phone call from his friend, Smith. According to Smith, the main Mason Insurance web site had been vandalized! All of its normal content was removed and replaced with an attacker’s message ”Hacker Message: You are dead! Freaks!” From his office, which was directly connected to Mason Insurance’s internal network, Joseph surfed to the Web site using his laptop. In his browser, the Web site looked completely intact.
    No changes were apparent. Joseph called a friend of his at his home to help troubleshoot the problem. The Web site appeared defaced when his friend visited using his DSL connection. So, while Smith and his friend could see the defaced page, Joseph saw the intact Mason Insurance web site. To help make sense of this problem, Joseph decided to access the Web site using hisdial-up ISP. He disconnected his laptop from the corporate internal network and used his modem to dial up the same ISP used by Smith. After his modem connected, he quickly typed www.masonins.com in his browser to reveal the following web page:

    312-50 Part 28 Q05 031
    312-50 Part 28 Q05 031

    After seeing the defaced Web site, he disconnected his dial-up line, reconnected to the internal network, and used Secure Shell (SSH) to log in directly to the Web server. He ran Tripwire against the entire Web site, and determined that every system file and all the Web content on the server were intact. How did the attacker accomplish this hack?

    • ARP spoofing
    • SQL injection
    • DNS poisoning
    • Routing table injection
  6. Which of the following tools are used for enumeration? (Choose three.)

    • SolarWinds
    • USER2SID
    • Cheops
    • SID2USER
    • DumpSec
  7. What did the following commands determine?

    312-50 Part 28 Q07 032
    312-50 Part 28 Q07 032
    • That the Joe account has a SID of 500
    • These commands demonstrate that the guest account has NOT been disabled
    • These commands demonstrate that the guest account has been disabled
    • That the true administrator is Joe
    • Issued alone, these commands prove nothing
  8. Which definition among those given below best describes a covert channel?

    • A server program using a port that is not well known.
    • Making use of a protocol in a way it is not intended to be used.
    • It is the multiplexing taking place on a communication link.
    • It is one of the weak channels used by WEP which makes it insecure
  9. Susan has attached to her company’s network. She has managed to synchronize her boss’s sessions with that of the file server. She then intercepted his traffic destined for the server, changed it the way she wanted to and then placed it on the server in his home directory.

    What kind of attack is Susan carrying on?

    • A sniffing attack
    • A spoofing attack
    • A man in the middle attack
    • A denial of service attack
  10. Eric has discovered a fantastic package of tools named Dsniff on the Internet. He has learnt to use these tools in his lab and is now ready for real world exploitation. He was able to effectively intercept communications between the two entities and establish credentials with both sides of the connections. The two remote ends of the communication never notice that Eric is relaying the information between the two. What would you call this attack?

    • Interceptor
    • Man-in-the-middle
    • ARP Proxy
    • Poisoning Attack
  11. Eve is spending her day scanning the library computers. She notices that Alice is using a computer whose port 445 is active and listening. Eve uses the ENUM tool to enumerate Alice machine. From the command prompt, she types the following command.

    312-50 Part 28 Q11 033
    312-50 Part 28 Q11 033

    What is Eve trying to do?

    • Eve is trying to connect as a user with Administrator privileges
    • Eve is trying to enumerate all users with Administrative privileges
    • Eve is trying to carry out a password crack for user Administrator
    • Eve is trying to escalate privilege of the null user to that of Administrator
  12. Which of the following represents the initial two commands that an IRC client sends to join an IRC network?

    • USER, NICK
    • LOGIN, NICK
    • USER, PASS
    • LOGIN, USER
  13. Study the following log extract and identify the attack.

    312-50 Part 28 Q13 034
    312-50 Part 28 Q13 034
    • Hexcode Attack
    • Cross Site Scripting
    • Multiple Domain Traversal Attack
    • Unicode Directory Traversal Attack
  14. Null sessions are un-authenticated connections (not using a username or password.) to an NT or 2000 system. Which TCP and UDP ports must you filter to check null sessions on your network?

    • 137 and 139
    • 137 and 443
    • 139 and 443
    • 139 and 445
  15. The following is an entry captured by a network IDS. You are assigned the task of analyzing this entry. You notice the value 0x90, which is the most common NOOP instruction for the Intel processor. You figure that the attacker is attempting a buffer overflow attack.
    You also notice “/bin/sh” in the ASCII part of the output.
    As an analyst what would you conclude about the attack?

    312-50 Part 28 Q15 035
    312-50 Part 28 Q15 035
    • The buffer overflow attack has been neutralized by the IDS
    • The attacker is creating a directory on the compromised machine
    • The attacker is attempting a buffer overflow attack and has succeeded
    • The attacker is attempting an exploit that launches a command-line shell
  16. Based on the following extract from the log of a compromised machine, what is the hacker really trying to steal?

    • har.txt
    • SAM file
    • wwwroot
    • Repair file
  17. As a securing consultant, what are some of the things you would recommend to a company to ensure DNS security?

    • Use the same machines for DNS and other applications
    • Harden DNS servers
    • Use split-horizon operation for DNS servers
    • Restrict Zone transfers
    • Have subnet diversity between DNS servers
  18. Why would you consider sending an email to an address that you know does not exist within the company you are performing a Penetration Test for?

    • To determine who is the holder of the root account
    • To perform a DoS
    • To create needless SPAM
    • To illicit a response back that will reveal information about email servers and how they treat undeliverable mail
    • To test for virus protection
  19. What tool can crack Windows SMB passwords simply by listening to network traffic?

    • This is not possible
    • Netbus
    • NTFSDOS
    • L0phtcrack
  20. A network admin contacts you. He is concerned that ARP spoofing or poisoning might occur on his network. What are some things he can do to prevent it? Select the best answers.

    • Use port security on his switches.
    • Use a tool like ARPwatch to monitor for strange ARP activity.
    • Use a firewall between all LAN segments.
    • If you have a small network, use static ARP entries.
    • Use only static IP addresses on all PC’s.