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Q1. If a competitor wants to cause damage to your organization, steal critical secrets, or put you out of business, they just have to find a job opening, prepare someone to pass the interview, have that person hired, and they will be in the organization.
How would you prevent such type of attacks?
A. It is impossible to block these attacks
B. Hire the people through third-party job agencies who will vet them for you
C. Conduct thorough background checks before you engage them
D. Investigate their social networking profiles
Answer: C
Q2. SSL has been as the solution to a lot of common security problems. Administrator will often time make use of SSL to encrypt communications from points A to Point B. Why do you think this could be a bad idea if there is an Intrusion Detection System deployed to monitor the traffic between Point A to Point B?
A. SSL is redundant if you already have IDS’s in place
B. SSL will trigger rules at regular interval and force the administrator to turn them off
C. SSL will make the content of the packet and Intrusion Detection System are blinded
D. SSL will slow down the IDS while it is breaking the encryption to see the packet content
Answer: C
Explanation: An IDS will not be able to evaluate the content in the packets if it is encrypted.
Q3. RC4 is known to be a good stream generator. RC4 is used within the WEP standard on wireless LAN. WEP is known to be insecure even if we are using a stream cipher that is known to be secured.
What is the most likely cause behind this?
A. There are some flaws in the implementation.
B. There is no key management.
C. The IV range is too small.
D. All of the above.
E. None of the above.
Answer: D
Explanation: Because RC4 is a stream cipher, the same traffic key must never be used twice. The purpose of an IV, which is transmitted as plain text, is to prevent any repetition, but a 24-bit IV is not long enough to ensure this on a busy network. The way the IV was used also opened WEP to a related key attack. For a 24-bit IV, there is a 50% probability the same IV will repeat after 5000 packets. Many WEP systems require a key in hexadecimal format. Some users choose keys that spell words in the limited 0-9, A-F hex character set, for example C0DE C0DE C0DE C0DE. Such keys are often easily guessed.
Q4. This TCP flag instructs the sending system to transmit all buffered data immediately.
A. SYN
B. RST
C. PSH
D. URG
E. FIN
Answer: C
Q5. ou have hidden a Trojan file virus.exe inside another file readme.txt using NTFS streaming.
Which command would you execute to extract the Trojan to a standalone file?
A. c:\> type readme.txt:virus.exe > virus.exe
B. c:\> more readme.txt | virus.exe > virus.exe
C. c:\> cat readme.txt:virus.exe > virus.exe
D. c:\> list redme.txt$virus.exe > virus.exe
Answer: C
Explanation: cat will concatenate, or write, the alternate data stream to its own file named virus.exe
Q6. Exhibit:
Based on the following extract from the log of a compromised machine, what is the hacker really trying to steal?
A. har.txt
B. SAM file
C. wwwroot
D. Repair file
Answer: B
Explanation: He is actually trying to get the file har.txt but this file contains a copy of the SAM file.
Q7. Consider the following code:
If an attacker can trick a victim user to click a link like this and the web application does not validate input, then the victim’s browser will pop up an alert showing the users current set of cookies. An attacker can do much more damage, including stealing passwords, resetting your home page or redirecting the user to another web site.
What is the countermeasure against XSS scripting?
A. Create an IP access list and restrict connections based on port number
B. Replace “<” and “>” characters with ?lt; and ?gt; using server scripts
C. Disable Javascript in IE and Firefox browsers
D. Connect to the server using HTTPS protocol instead of HTTP
Answer: B
Explanation: The correct answer contains a string which is an HTML-quoted version of the original script. The quoted versions of these characters will appear as literals in a browser, rather than with their special meaning as HTML tags. This prevents any script from being injected into HTML output, but it also prevents any user-supplied input from being formatted with benign HTML.
Topic 13, Web Based Password Cracking Techniques
Q8. War dialing is a very old attack and depicted in movies that were made years ago.
Why would a modem security tester consider using such an old technique?
A. It is cool, and if it works in the movies it must work in real life.
B. It allows circumvention of protection mechanisms by being on the internal network.
C. It allows circumvention of the company PBX.
D. A good security tester would not use such a derelict technique.
Answer: B
Explanation: If you are lucky and find a modem that answers and is connected to the target network, it usually is less protected (as only employees are supposed to know of its existence) and once connected you don’t need to take evasive actions towards any firewalls or IDS.
Q9. What is a Trojan Horse?
A. A malicious program that captures your username and password
B. Malicious code masquerading as or replacing legitimate code
C. An unauthorized user who gains access to your user database and adds themselves as a user
D. A server that is to be sacrificed to all hacking attempts in order to log and monitor the hacking activity
Answer: B
Explanation: A Trojan Horse is an apparently useful and innocent program containing additional hidden code which allows the unauthorized collection, exploitation, falsification, or destruction of data.
Q10. Anonymizer sites access the Internet on your behalf, protecting your personal information from disclosure. An anonymizer protects all of your computer's identifying information while it surfs for you, enabling you to remain at least one step removed from the sites you visit.
You can visit Web sites without allowing anyone to gather information on sites visited by you. Services that provide anonymity disable pop-up windows and cookies, and conceal visitor's IP address.
These services typically use a proxy server to process each HTTP request. When the user requests a Web page by clicking a hyperlink or typing a URL into their browser, the service retrieves and displays the information using its own server. The remote server (where the requested Web page resides) receives information on the anonymous Web surfing service in place of your information.
In which situations would you want to use anonymizer? (Select 3 answers)
A. Increase your Web browsing bandwidth speed by using Anonymizer
B. To protect your privacy and Identity on the Internet
C. To bypass blocking applications that would prevent access to Web sites or parts of sites that you want to visit.
D. Post negative entries in blogs without revealing your IP identity
Answer: BCD
Q11. While reviewing the result of scanning run against a target network you come across the following:
Which among the following can be used to get this output?
A. A Bo2k system query.
B. nmap protocol scan
C. A sniffer
D. An SNMP walk
Answer: D
Explanation: SNMP lets you "read" information from a device. You make a query of the server (generally known as the "agent"). The agent gathers the information from the host system and returns the answer to your SNMP client. It's like having a single interface for all your informative Unix commands. Output like system.sysContact.0 is called a MIB.
Q12. You are doing IP spoofing while you scan your target. You find that the target has port 23 open.Anyway you are unable to connect. Why?
A. A firewall is blocking port 23
B. You cannot spoof + TCP
C. You need an automated telnet tool
D. The OS does not reply to telnet even if port 23 is open
Answer: A
Explanation: The question is not telling you what state the port is being reported by the scanning utility, if the program used to conduct this is nmap, nmap will show you one of three states – “open”, “closed”, or “filtered” a port can be in an “open” state yet filtered, usually by a stateful packet inspection filter (ie. Netfilter for linux, ipfilter for bsd). C and D to make any sense for this question, their bogus, and B, “You cannot spoof + TCP”, well you can spoof + TCP, so we strike that out.
Q13. 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
Q14. Neil is an IT security consultant working on contract for Davidson Avionics. Neil has been hired to audit the network of Davidson Avionics. He has been given permission to perform any tests necessary. Neil has created a fake company ID badge and uniform. Neil waits by one of the company's entrance doors and follows an employee into the office after they use their valid access card to gain entrance. What type of social engineering attack has Neil employed here?
A. Neil has used a tailgating social engineering attack to gain access to the offices
B. He has used a piggybacking technique to gain unauthorized access
C. This type of social engineering attack is called man trapping
D. Neil is using the technique of reverse social engineering to gain access to the offices of Davidson Avionics
Answer: A
Q15. Network Intrusion Detection systems can monitor traffic in real time on networks.
Which one of the following techniques can be very effective at avoiding proper detection?
A. Fragmentation of packets.
B. Use of only TCP based protocols.
C. Use of only UDP based protocols.
D. Use of fragmented ICMP traffic only.
Answer: A
Explanation: If the default fragmentation reassembly timeout is set to higher on the client than on the IDS then the it is possible to send an attack in fragments that will never be reassembled in the IDS but they will be reassembled and read on the client computer acting victim.