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Q341. A file integrity program such as Tripwire protects against Trojan horse attacks by:
A. Automatically deleting Trojan horse programs
B. Rejecting packets generated by Trojan horse programs
C. Using programming hooks to inform the kernel of Trojan horse behavior
D. Helping you catch unexpected changes to a system utility file that might indicate it had been replaced by a Trojan horse
Answer: D
Explanation: Tripwire generates a database of the most common files and directories on your system. Once it is generated, you can then check the current state of your system against the original database and get a report of all the files that have been modified, deleted or added. This comes in handy if you allow other people access to your machine and even if you don't, if someone else does get access, you'll know if they tried to modify files such as /bin/login etc.
Q342. You have successfully run a buffer overflow attack against a default IIS installation running on a Windows 2000 Server. The server allows you to spawn a shell. In order to perform the actions you intend to do, you need elevated permission. You need to know what your current privileges are within the shell. Which of the following options would be your current privileges?
A. Administrator
B. IUSR_COMPUTERNAME
C. LOCAL_SYSTEM
D. Whatever account IIS was installed with
Answer: C
Explanation: If you manage to get the system to start a shell for you, that shell will be running as LOCAL_SYSTEM.
Q343. While testing web applications, you attempt to insert the following test script into the search area on the company's web site:
<script>alert('Testing Testing Testing')</script>
Afterwards, when you press the search button, a pop up box appears on your screen with the text "Testing Testing Testing". What vulnerability is detected in the web application here?
A. A hybrid attack
B. A buffer overflow
C. Password attacks
D. Cross Site Scripting
Answer: D
Explanation: Cross-site scripting (XSS) is a type of computer security vulnerability typically found in web applications which allow code injection by malicious web users into the web pages viewed by other users. Examples of such code include HTML code and client-side scripts. An exploited cross-site scripting vulnerability can be used by attackers to bypass access controls such as the same origin policy.
Q344. This method is used to determine the Operating system and version running on a remote target system. What is it called?
A. Service Degradation
B. OS Fingerprinting
C. Manual Target System
D. Identification Scanning
Answer: B
Q345. 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
Answer: D
Up to the immediate present ceh exam 312-50 pdf:
Q346. Gerald, the systems administrator for Hyped Enterprise, has just discovered that his network has been breached by an outside attacker. After performing routine maintenance on his servers, his discovers numerous remote tools were installed that no one claims to have knowledge of in his department.
Gerald logs onto the management console for his IDS and discovers an unknown IP address that scanned his network constantly for a week and was able to access his network through a high-level port that was not closed. Gerald traces the IP address he found in the IDS log to proxy server in Brazil.
Gerald calls the company that owns the proxy server and after searching through their logs, they trace the source to another proxy server in Switzerland. Gerald calls the company in Switzerland that owns the proxy server and after scanning through the logs again, they trace the source back to a proxy server in China.
What tool Geralds’s attacker used to cover their tracks?
A. Tor
B. ISA
C. IAS
D. Cheops
Answer: A
Explanation: Tor is a network of virtual tunnels that allows people and groups to improve their privacy and security on the Internet. It also enables software developers to create new communication tools with built-in privacy features. It provides the foundation for a range of applications that allow organizations and individuals to share information over public networks without compromising their privacy. Individuals can use it to keep remote Websites from tracking them and their family members. They can also use it to connect to resources such as news sites or instant messaging services that are blocked by their local Internet service providers (ISPs).
Q347. You receive an e-mail like the one shown below. When you click on the link contained in the mail, you are redirected to a website seeking you to download free Anti-Virus software.
Dear valued customers,
We are pleased to announce the newest version of Antivirus 2010 for Windows which will probe you with total security against the latest spyware, malware, viruses, Trojans and other online threats. Simply visit the link below and enter your antivirus code:
Antivirus code: 5014
http://www.juggyboy/virus/virus.html
Thank you for choosing us, the worldwide leader Antivirus solutions.
Mike Robertson
PDF Reader Support
Copyright Antivirus 2010 ?All rights reserved
If you want to stop receiving mail, please go to:
http://www.juggyboy.com
or you may contact us at the following address: Media Internet Consultants, Edif. Neptuno, Planta
Baja, Ave. Ricardo J. Alfaro, Tumba Muerto, n/a Panama
How will you determine if this is Real Anti-Virus or Fake Anti-Virus website?
A. Look at the website design, if it looks professional then it is a Real Anti-Virus website
B. Connect to the site using SSL, if you are successful then the website is genuine
C. Search using the URL and Anti-Virus product name into Google and lookout for suspicious warnings against this site
D. Download and install Anti-Virus software from this suspicious looking site, your Windows 7 will prompt you and stop the installation if the downloaded file is a malware
E. Download and install Anti-Virus software from this suspicious looking site, your Windows 7 will prompt you and stop the installation if the downloaded file is a malware
Answer: C
Q348. Exhibit:
Please study the exhibit carefully.
Which Protocol maintains the communication on that way?
A. UDP
B. IP
C. TCP
D. ARP
E. RARP
Answer: C
Explanation: A TCP connection is always initiated with the 3-way handshake, which establishes and negotiates the actual connection over which data will be sent.
Q349. Maurine is working as a security consultant for Hinklemeir Associate. She has asked the Systems Administrator to create a group policy that would not allow null sessions on the network. The Systems Administrator is fresh out of college and has never heard of null sessions and does not know what they are used for. Maurine is trying to explain to the Systems Administrator that hackers will try to create a null session when footprinting the network.
Why would an attacker try to create a null session with a computer on a network?
A. Enumerate users shares
B. Install a backdoor for later attacks
C. Escalate his/her privileges on the target server
D. To create a user with administrative privileges for later use
Answer: A
Explanation: The Null Session is often referred to as the "Holy Grail" of Windows hacking. Listed as the number 5 windows vulnerability on the SANS/FBI Top 20 list, Null Sessions take advantage of flaws in the CIFS/SMB (Common Internet File System/Server Messaging Block) architecture. You can establish a Null Session with a Windows (NT/2000/XP) host by logging on with a null user name and password. Using these null connections allows you to gather the following information from the host:
-List of users and groups
-List of machines
-List of shares
-Users and host SID' (Security Identifiers)
Topic 5, System Hacking
177. If a token and 4-digit personal identification number (PIN) are used to access a computer system and the token performs off-line checking for the correct PIN, what type of attack is possible?
A. Birthday
B. Brute force
C. Man-in-the-middle
D. Smurf
Answer: B
Explanation: Brute force attacks are performed with tools that cycle through many possible character, number, and symbol combinations to guess a password. Since the token allows offline checking of PIN, the cracker can keep trying PINS until it is cracked.
Q350. In an attempt to secure his wireless network, Bob implements a VPN to cover the wireless communications. Immediately after the implementation, users begin complaining about how slow the wireless network is. After benchmarking the network’s speed. Bob discovers that throughput has dropped by almost half even though the number of users has remained the same.
Why does this happen in the VPN over wireless implementation?
A. The stronger encryption used by the VPN slows down the network.
B. Using a VPN with wireless doubles the overhead on an access point for all direct client to access point communications.
C. VPNs use larger packets then wireless networks normally do.
D. Using a VPN on wireless automatically enables WEP, which causes additional overhead.
Answer: B
Explanation: By applying VPN the access point will have to recalculate all headers destined for client and from clients twice.