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Q431. Bob was frustrated with his competitor, Brownies Inc., and decided to launch an attack that would result in serious financial losses. He planned the attack carefully and carried out the attack at the appropriate moment.
Meanwhile, Trent, an administrator at Brownies Inc., realized that their main financial transaction server had been attacked. As a result of the attack, the server crashed and Trent needed to reboot the system, as no one was able to access the resources of the company. This process involves human interaction to fix it.
What kind of Denial of Service attack was best illustrated in the scenario above?
A. Simple DDoS attack
B. DoS attacks which involves flooding a network or system
C. DoS attacks which involves crashing a network or system
D. DoS attacks which is done accidentally or deliberately
Q432. How can a rootkit bypass Windows 7 operating system’s kernel mode, code signing policy?
A. Defeating the scanner from detecting any code change at the kernel
B. Replacing patch system calls with its own version that hides the rootkit (attacker's) actions
C. Performing common services for the application process and replacing real applications with fake ones
D. Attaching itself to the master boot record in a hard drive and changing the machine's boot sequence/options
Q433. _____ is the process of converting something from one representation to the simplest form. It deals with the way in which systems convert data from one form to another.
B. Character Mapping
C. Character Encoding
D. UCS transformation formats
Q434. 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
Q435. Samuel is the network administrator of DataX Communications, Inc. He is trying to configure his firewall to block password brute force attempts on his network. He enables blocking the intruder's IP address for a period of 24 hours' time after more than three unsuccessful attempts. He is confident that this rule will secure his network from hackers on the Internet.
But he still receives hundreds of thousands brute-force attempts generated from various IP addresses around the world. After some investigation he realizes that the intruders are using a proxy somewhere else on the Internet which has been scripted to enable the random usage of various proxies on each request so as not to get caught by the firewall rule.
Later he adds another rule to his firewall and enables small sleep on the password attempt so that if the password is incorrect, it would take 45 seconds to return to the user to begin another attempt. Since an intruder may use multiple machines to brute force the password, he also throttles the number of connections that will be prepared to accept from a particular IP address. This action will slow the intruder's attempts.
Samuel wants to completely block hackers brute force attempts on his network.
What are the alternatives to defending against possible brute-force password attacks on his site?
A. Enforce a password policy and use account lockouts after three wrong logon attempts even though this might lock out legit users
B. Enable the IDS to monitor the intrusion attempts and alert you by e-mail about the IP address of the intruder so that you can block them at the Firewall manually
C. Enforce complex password policy on your network so that passwords are more difficult to brute force
D. You cannot completely block the intruders attempt if they constantly switch proxies
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Q436. Bill has successfully executed a buffer overflow against a Windows IIS web server. He has been able to spawn an interactive shell and plans to deface the main web page. He first attempts to use the "echo" command to simply overwrite index.html and remains unsuccessful. He then attempts to delete the page and achieves no progress. Finally, he tries to overwrite it with another page in which also he remains unsuccessful. What is the probable cause of Bill's problem?
A. You cannot use a buffer overflow to deface a web page
B. There is a problem with the shell and he needs to run the attack again
C. The HTML file has permissions of read only
D. The system is a honeypot
Q437. You may be able to identify the IP addresses and machine names for the firewall, and the names of internal mail servers by:
A. Sending a mail message to a valid address on the target network,and examining the header information generated by the IMAP servers
B. Examining the SMTP header information generated by using the –mx command parameter of DIG
C. Examining the SMTP header information generated in response to an e-mail message sent to an invalid address
D. Sending a mail message to an invalid address on the target network,and examining the header information generated by the POP servers
Q438. William has received a Chess game from someone in his computer programming class through email. William does not really know the person who sent the game very well, but decides to install the game anyway because he really likes Chess.
After William installs the game, he plays it for a couple of hours. The next day, William plays the Chess game again and notices that his machine has begun to slow down. He brings up his Task Manager and sees the following programs running:
What has William just installed?
A. Zombie Zapper (ZoZ)
B. Remote Access Trojan (RAT)
C. Bot IRC Tunnel (BIT)
D. Root Digger (RD)
Q439. Cyber Criminals have long employed the tactic of masking their true identity. In IP spoofing,
an attacker gains unauthorized access to a computer or a network by making it appear that a malicious message has come from a trusted machine, by "spoofing" the IP address of that machine.
How would you detect IP spoofing?
A. Check the IPID of the spoofed packet and compare it with TLC checksum. If the numbers match then it is spoofed packet
B. Probe a SYN Scan on the claimed host and look for a response SYN/FIN packet,if the connection completes then it is a spoofed packet
C. Turn on 'Enable Spoofed IP Detection' in Wireshark,you will see a flag tick if the packet is spoofed
D. Sending a packet to the claimed host will result in a reply. If the TTL in the reply is not the same as the packet being checked then it is a spoofed packet
Q440. You are trying to break into a highly classified top-secret mainframe computer with highest security system in place at Merclyn Barley Bank located in Los Angeles. You know that conventional hacking doesn't work in this case, because organizations such as banks are generally tight and secure when it comes to protecting their systems. In other words you are trying to penetrate an otherwise impenetrable system. How would you proceed?
A. Look for "zero-day" exploits at various underground hacker websites in Russia and China and buy the necessary exploits from these hackers and target the bank's network
B. Try to hang around the local pubs or restaurants near the bank,get talking to a poorly-paid or disgruntled employee,and offer them money if they'll abuse their access privileges by providing you with sensitive information
C. Launch DDOS attacks against Merclyn Barley Bank's routers and firewall systems using 100,000 or more "zombies" and "bots"
D. Try to conduct Man-in-the-Middle (MiTM) attack and divert the network traffic going to the Merclyn Barley Bank's Webserver to that of your machine using DNS Cache Poisoning techniques
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