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2021 Mar 312-50 actual exam

Q71. How would you describe a simple yet very effective mechanism for sending and receiving unauthorized information or data between machines without alerting any firewalls and IDS's on a network? 

A. Covert Channel 

B. Crafted Channel 

C. Bounce Channel 

D. Deceptive Channel 

Answer:

Explanation: A covert channel is described as: "any communication channel that can be exploited by a process to transfer information in a manner that violates the systems security policy." 

Essentially, it is a method of communication that is not part of an actual computer system design, but can be used to transfer information to users or system processes that normally would not be allowed access to the information. 


Q72. What framework architecture is shown in this exhibit? 

A. Core Impact 

B. Metasploit 

C. Immunity Canvas 

D. Nessus 

Answer: B


Q73. 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D. Helping you catch unexpected changes to a system utility file that might indicate it had been replaced by a Trojan horse 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. 


Q74. You want to perform advanced SQL Injection attack against a vulnerable website. You are unable to perform command shell hacks on this server. What must be enabled in SQL Server to launch these attacks? 

A. System services 

B. EXEC master access 

C. xp_cmdshell 

D. RDC 

Answer: C


Q75. BankerFox is a Trojan that is designed to steal users' banking data related to certain banking entities. 

When they access any website of the affected banks through the vulnerable Firefox 3.5 browser, the Trojan is activated and logs the information entered by the user. All the information entered in that website will be logged by the Trojan and transmitted to the attacker's machine using covert channel. 

BankerFox does not spread automatically using its own means. It needs an attacking user's intervention in order to reach the affected computer. 

What is the most efficient way an attacker located in remote location to infect this banking Trojan on a victim's machine? 

A. Physical access - the attacker can simply copy a Trojan horse to a victim's hard disk infecting the machine via Firefox add-on extensions 

B. Custom packaging - the attacker can create a custom Trojan horse that mimics the appearance of a program that is unique to that particular computer 

C. Custom packaging - the attacker can create a custom Trojan horse that mimics the appearance of a program that is unique to that particular computer 

D. Custom packaging - the attacker can create a custom Trojan horse that mimics the appearance of a program that is unique to that particular computer 

E. Downloading software from a website? An attacker can offer free software, such as shareware programs and pirated mp3 files 

Answer: E


Regenerate 312-50 test question:

Q76. Mark works as a contractor for the Department of Defense and is in charge of network security. He has spent the last month securing access to his network from all possible entry points. He has segmented his network into several subnets and has installed firewalls all over the network. He has placed very stringent rules on all the firewalls, blocking everything in and out except ports that must be used. He does need to have port 80 open since his company hosts a website that must be accessed from the Internet. Mark is fairly confident of his perimeter defense, but is still worried about programs like Hping2 that can get into a network through convert channels. 

How should mark protect his network from an attacker using Hping2 to scan his internal network? 

A. Blocking ICMP type 13 messages 

B. Block All Incoming traffic on port 53 

C. Block All outgoing traffic on port 53 

D. Use stateful inspection on the firewalls 

Answer: A

Explanation: An ICMP type 13 message is an ICMP timestamp request and waits for an ICMP timestamp reply. The remote node is right to do, still it would not be necessary as it is optional and thus many ip stacks ignore such packets. Nevertheless, nmap again achived to make its packets unique by setting the originating timestamp field in the packet to 0. 


Q77. Lee is using Wireshark to log traffic on his network. He notices a number of packets being directed to an internal IP from an outside IP where the packets are ICMP and their size is around 65,536 bytes. What is Lee seeing here? 

A. Lee is seeing activity indicative of a Smurf attack. 

B. Most likely, the ICMP packets are being sent in this manner to attempt IP spoofing. 

C. Lee is seeing a Ping of death attack. 

D. This is not unusual traffic, ICMP packets can be of any size. 

Answer: C


Q78. Switches maintain a CAM Table that maps individual MAC addresses on the network to physical ports on the switch. 

In MAC flooding attack, a switch is fed with many Ethernet frames, each containing different source MAC addresses, by the attacker. Switches have a limited memory for mapping various MAC addresses to physical ports. What happens when the CAM table becomes full? 

A. Switch then acts as hub by broadcasting packets to all machines on the network 

B. The CAM overflow table will cause the switch to crash causing Denial of Service 

C. The switch replaces outgoing frame switch factory default MAC address of FF:FF:FF:FF:FF:FF 

D. Every packet is dropped and the switch sends out SNMP alerts to the IDS port 

Answer: A


Q79. You are trying to package a RAT Trojan so that Anti-Virus software will not detect it. Which of the listed technique will NOT be effective in evading Anti-Virus scanner? 

A. Convert the Trojan.exe file extension to Trojan.txt disguising as text file 

B. Break the Trojan into multiple smaller files and zip the individual pieces 

C. Change the content of the Trojan using hex editor and modify the checksum 

D. Encrypt the Trojan using multiple hashing algorithms like MD5 and SHA-1 

Answer: A


Q80. What type of attack is shown here? 

A. Bandwidth exhaust Attack 

B. Denial of Service Attack 

C. Cluster Service Attack 

D. Distributed Denial of Service Attack 

Answer: B