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Exam Code: 312-50 (Practice Exam Latest Test Questions VCE PDF)
Exam Name: Ethical Hacking and Countermeasures (CEHv6)
Certification Provider: EC-Council
Free Today! Guaranteed Training- Pass 312-50 Exam.

Q311. Lyle is a systems security analyst for Gusteffson & Sons, a large law firm in Beverly Hills. Lyle's responsibilities include network vulnerability scans, Antivirus monitoring, and IDS monitoring. Lyle receives a help desk call from a user in the Accounting department. This user reports that his computer is running very slow all day long and it sometimes gives him an error message that the hard drive is almost full. Lyle runs a scan on the computer with the company antivirus software and finds nothing. Lyle downloads another free antivirus application and scans the computer again. This time a virus is found on the computer. The infected files appear to be Microsoft Office files since they are in the same directory as that software. Lyle does some research and finds that this virus disguises itself as a genuine application on a computer to hide from antivirus software. What type of virus has Lyle found on this computer? 

A. This type of virus that Lyle has found is called a cavity virus. 

B. Lyle has discovered a camouflage virus on the computer. 

C. By using the free antivirus software, Lyle has found a tunneling virus on the computer. 

D. Lyle has found a polymorphic virus on this computer 

Answer: C


Q312. When a normal TCP connection starts, a destination host receives a SYN (synchronize/start) packet from a source host and sends back a SYN/ACK (synchronize acknowledge). The destination host must then hear an ACK (acknowledge) of the SYN/ACK before the connection is established. This is referred to as the "TCP three-way handshake." While waiting for the ACK to the SYN ACK, a connection queue of finite size on the destination host keeps track of connections waiting to be completed. This queue typically empties quickly since the ACK is expected to arrive a few milliseconds after the SYN ACK. How would an attacker exploit this design by launching TCP SYN attack? 

A. Attacker generates TCP SYN packets with random destination addresses towards a victim host 

B. Attacker floods TCP SYN packets with random source addresses towards a victim host 

C. Attacker generates TCP ACK packets with random source addresses towards a victim host 

D. Attacker generates TCP RST packets with random source addresses towards a victim host 

Answer: B


Q313. What is "Hacktivism"? 

A. Hacking for a cause 

B. Hacking ruthlessly 

C. An association which groups activists 

D. None of the above 

Answer: A

Explanation: The term was coined by author/critic Jason Logan King Sack in an article about media artist Shu Lea Cheang. Acts of hacktivism are carried out in the belief that proper use of code will have leveraged effects similar to regular activism or civil disobedience. 


Q314. Study the snort rule given below: 

From the options below, choose the exploit against which this rule applies. 

A. WebDav 

B. SQL Slammer 

C. MS Blaster 

D. MyDoom 

Answer: C

Explanation: MS Blaster scans the Internet for computers that are vulnerable to its attack. Once found, it tries to enter the system through the port 135 to create a buffer overflow. TCP ports 139 and 445 may also provide attack vectors. 


Q315. This attack technique is used when a Web application is vulnerable to an SQL Injection but the results of the Injection are not visible to the attacker. 

A. Unique SQL Injection 

B. Blind SQL Injection 

C. Generic SQL Injection 

D. Double SQL Injection 

Answer: B


Q316. Richard is a network Administrator working at a student loan company in lowa. This company processes over 20,000 students loan a year from colleges all over the state. Most communication between the company, schools and lenders is carried out through email. Because of privacy laws that are in the process of being implemented, Richard wants to get ahead of the game and become compliant before any sort of auditing occurs. Much of the email communication used at his company contains sensitive information such as social security numbers. For this reason, Richard wants to utilize email encryption agency-wide. The only problem for Richard is that his department only has couple of servers and they are utilized to their full capacity. Since a server-based PKI is not an option for him, he is looking for a low/no cost solution to encrypt email. 

What should Richard use? 

A. PGP 

B. RSA 

C. 3DES 

D. OTP 

Answer: A

Explanation: PGP (Pretty Good Privacy) is an encryption program being used for secure transmission of files and e-mails. This adapts public-key encryption technology in which pairs of keys are used to maintain secure communication. For PGP-based communication both the sender and receiver should have public and private key pairs. The sender's public key should be distributed to the receiver. Similarly, the receiver's public key should be distributed to the sender. When sending a message or a file, the sender can sign using his private key. Also, the sender's private key is never distributed. All encryption is made on the workstation sending the e-mail. 


Q317. When working with Windows systems, what is the RID of the true administrator account? 

A. 500 

B. 501 

C. 512 

D. 1001 

E. 1024 

F. 1000 

Answer:

Explanation: The built-in administrator account always has a RID of 500. 


Q318. You are scanning into the target network for the first time. You find very few conventional ports open. When you attempt to perform traditional service identification by connecting to the open ports, it yields either unreliable or no results. You are unsure of what protocols are being used. You need to discover as many different protocols as possible. Which kind of scan would you use to do this? 

A. Nmap with the –sO (Raw IP packets) switch 

B. Nessus scan with TCP based pings 

C. Nmap scan with the –sP (Ping scan) switch 

D. Netcat scan with the –u –e switches 

Answer: A

Explanation: Running Nmap with the –sO switch will do a IP Protocol Scan. The IP protocol scan is a bit different than the other nmap scans. The IP protocol scan is searching for additional IP protocols in use by the remote station, such as ICMP, TCP, and UDP. If a router is scanned, additional IP protocols such as EGP or IGP may be identified. 


Q319. More sophisticated IDSs look for common shellcode signatures. But even these systems can be bypassed, by using polymorphic shellcode. This is a technique common among virus writers - it basically hides the true nature of the shellcode in different disguises. 

How does a polymorphic shellcode work? 

A. They convert the shellcode into Unicode, using loader to convert back to machine code then executing them 

B. They compress shellcode into normal instructions, uncompress the shellcode using loader code and then executing the shellcode 

C. They reverse the working instructions into opposite order by masking the IDS signatures 

D. They encrypt the shellcode by XORing values over the shellcode, using loader code to decrypt the shellcode, and then executing the decrypted shellcode 

Answer: A

Explanation: In computer security, a shellcode is a small piece of code used as the payload in the exploitation of a software vulnerability. It is called "shellcode" because it typically starts a command shell from which the attacker can control the compromised machine. Shellcode is commonly written in machine code, but any piece of code that performs a similar task can be called shellcode 


Q320. In which step Steganography fits in CEH System Hacking Cycle (SHC) 

A. Step 2: Crack the password 

B. Step 1: Enumerate users 

C. Step 3: Escalate privileges 

D. Step 4: Execute applications 

E. Step 5: Hide files 

F. Step 6: Cover your tracks 

Answer: ACDEF



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