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April 20, 2017

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Q391. Travis works primarily from home as a medical transcriptions. 

He just bought a brand new Dual Core Pentium Computer with over 3 GB of RAM. He uses voice recognition software is processor intensive, which is why he bought the new computer. Travis frequently has to get on the Internet to do research on what he is working on. After about two months of working on his new computer, he notices that it is not running nearly as fast as it used to. 

Travis uses antivirus software, anti-spyware software and always keeps the computer up-to-date with Microsoft patches. 

After another month of working on the computer, Travis computer is even more noticeable slow. Every once in awhile, Travis also notices a window or two pop-up on his screen, but they quickly disappear. He has seen these windows show up, even when he has not been on the Internet. Travis is really worried about his computer because he spent a lot of money on it and he depends on it to work. Travis scans his through Windows Explorer and check out the file system, folder by folder to see if there is anything he can find. He spends over four hours pouring over the files and folders and can’t find anything but before he gives up, he notices that his computer only has about 10 GB of free space available. Since has drive is a 200 GB hard drive, Travis thinks this is very odd. 

Travis downloads Space Monger and adds up the sizes for all the folders and files on his computer. According to his calculations, he should have around 150 GB of free space. What is mostly likely the cause of Travi’s problems? 

A. Travis’s Computer is infected with stealth kernel level rootkit 

B. Travi’s Computer is infected with Stealth Torjan Virus 

C. Travis’s Computer is infected with Self-Replication Worm that fills the hard disk space 

D. Logic Bomb’s triggered at random times creating hidden data consuming junk files 

Answer: A

Explanation: A rootkit can take full control of a system. A rootkit's only purpose is to hide files, network connections, memory addresses, or registry entries from other programs used by system administrators to detect intended or unintended special privilege accesses to the computer resources. 

Q392. 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

Q393. What do you conclude from the nmap results below? 

Staring nmap V. 3.10ALPHA0 (www.insecure.org/map/) 

(The 1592 ports scanned but not shown below are in state: closed) 

PortStateService 21/tcpopenftp 25/tcpopensmtp 80/tcpopenhttp 443/tcpopenhttps 

Remote operating system guess: Too many signatures match the reliability guess the OS. Nmap run completed – 1 IP address (1 host up) scanned in 91.66 seconds 

A. The system is a Windows Domain Controller. 

B. The system is not firewalled. 

C. The system is not running Linux or Solaris. 

D. The system is not properly patched. 


Explanation: There is no reports of any ports being filtered. 

Q394. When working with Windows systems, what is the RID of the true administrator account? 

A. 500 

B. 501 

C. 1000 

D. 1001 

E. 1024 

F. 512 

Answer: A

Explanation: Because of the way in which Windows functions, the true administrator account always has a RID of 500. 

Q395. You ping a target IP to check if the host is up. You do not get a response. You suspect ICMP is blocked at the firewall. Next you use hping2 tool to ping the target host and you get a response. Why does the host respond to hping2 and not ping packet? 

[ceh]# ping 

PING ( from : 56(84) bytes of data. 

--- ping statistics ---

3 packets transmitted, 0 packets received, 100% packet loss 

[ceh]# ./hping2 -c 4 -n -i 2 

HPING (eth0 NO FLAGS are set, 40 headers + 

0 data bytes 

len=46 ip= flags=RA seq=0 ttl=128 id=54167 win=0 rtt=0.8 ms 

len=46 ip= flags=RA seq=1 ttl=128 id=54935 win=0 rtt=0.7 ms 

len=46 ip= flags=RA seq=2 ttl=128 id=55447 win=0 rtt=0.7 ms 

len=46 ip= flags=RA seq=3 ttl=128 id=55959 win=0 rtt=0.7 ms 

--- hping statistic ---

4 packets tramitted, 4 packets received, 0% packet loss 

round-trip min/avg/max = 0.7/0.8/0.8 ms 

A. ping packets cannot bypass firewalls 

B. you must use ping switch 

C. hping2 uses TCP instead of ICMP by default 

D. hping2 uses stealth TCP packets to connect 

Answer: C

Explanation: Default protocol is TCP, by default hping2 will send tcp headers to target host's port 0 with a winsize of 64 without any tcp flag on. Often this is the best way to do an 'hide ping', useful when target is behind a firewall that drop ICMP. Moreover a tcp null-flag to port 0 has a good probability of not being logged. 

Q396. Which one of the following instigates a SYN flood attack? 

A. Generating excessive broadcast packets. 

B. Creating a high number of half-open connections. 

C. Inserting repetitive Internet Relay Chat (IRC) messages. 

D. A large number of Internet Control Message Protocol (ICMP) traces. 

Answer: B

Explanation: A SYN attack occurs when an attacker exploits the use of the buffer space during a Transmission Control Protocol (TCP) session initialization handshake. The attacker floods the target system's small "in-process" queue with connection requests, but it does not respond when a target system replies to those requests. This causes the target system to time out while waiting for the proper response, which makes the system crash or become unusable. 

Q397. Yancey is a network security administrator for a large electric company. This company provides power for over 100,000 people in Las Vegas. Yancey has worked for his company for over 15 years and has become very successful. One day, Yancey comes in to work and finds out that the company will be downsizing and he will be out of a job in two weeks. Yancey is very angry and decides to place logic bombs, viruses, Trojans, and backdoors all over the network to take down the company once he has left. Yancey does not care if his actions land him in jail for 30 or more years, he just wants the company to pay for what they are doing to him. What would Yancey be considered? 

A. Yancey would be considered a Suicide Hacker 

B. Since he does not care about going to jail, he would be considered a Black Hat 

C. Because Yancey works for the company currently; he would be a White Hat 

D. Yancey is a Hacktivist Hacker since he is standing up to a company that is downsizing 

Answer: A

Q398. Choose one of the following pseudo codes to describe this statement: 

If we have written 200 characters to the buffer variable, the stack should stop because it cannot hold any more data. 

A. If (I > 200) then exit (1) 

B. If (I < 200) then exit (1) 

C. If (I <= 200) then exit (1) 

D. If (I >= 200) then exit (1) 

Answer: D

Q399. How do you defend against ARP Poisoning attack? (Select 2 answers) A. Enable DHCP Snooping Binding Table 

B. Restrict ARP Duplicates 

C. Enable Dynamic ARP Inspection 

D. Enable MAC snooping Table 

Answer: AC

Q400. Steven is a senior security analyst for a state agency in Tulsa, Oklahoma. His agency is currently undergoing a mandated security audit by an outside consulting firm. The consulting firm is halfway through the audit and is preparing to perform the actual penetration testing against the agency’s network. The firm first sets up a sniffer on the agency’s wired network to capture a reasonable amount of traffic to analyze later. This takes approximately 2 hours to obtain 10 GB of data. The consulting firm then sets up a sniffer on the agency’s wireless network to capture the same amount of traffic. This capture only takes about 30 minutes to get 10 GB of data. 

Why did capturing of traffic take much less time on the wireless network? 

A. Because wireless access points act like hubs on a network 

B. Because all traffic is clear text, even when encrypted 

C. Because wireless traffic uses only UDP which is easier to sniff 

D. Because wireless networks can’t enable encryption 

Answer: A

Explanation: You can not have directed radio transfers over a WLAN. Every packet will be broadcasted as far as possible with no concerns about who might hear it. 

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