Exhibit: Based on the following extract from the log of a compromised machine, what is the hacker really trying to steal?
B. SAM file
D. Repair file
He is actually trying to get the file har.txt but this file contains a copy of the SAM file.
The following is an entry captured by a network IDS.You are assigned the task of analyzing this entry. You notice the value 0×90, which is the most common NOOP instruction for the Intel processor. You figure that the attacker is attempting a buffer overflow attack. You also notice “/bin/sh” in the ASCII part of the output. As an analyst what would you conclude about the attack?
A. The buffer overflow attack has been neutralized by the IDS
B. The attacker is creating a directory on the compromised machine
C. The attacker is attempting a buffer overflow attack and has succeeded
D. The attacker is attempting an exploit that launches a command-line shell
This log entry shows a hacker using a buffer overflow to fill the data buffer and trying to insert the execution of /bin/sh into the executable code part of the thread. It is probably an existing exploit that is used,or a directed attack with a custom built buffer overflow with the ppayloadq that launches the command shell.
As a securing consultant, what are some of the things you would recommend to a company to ensure DNS security? Select the best answers.
A. Use the same machines for DNS and other applications
B. Harden DNS servers
C. Use split-horizon operation for DNS servers
D. Restrict Zone transfers
E. Have subnet diversity between DNS servers
A is not a correct answer as it is never recommended to use a DNS server for any other application. Hardening of the DNS servers makes them less vulnerable to attack. It is recommended to split internal and external DNS servers (called split-horizon operation). Zone transfers should only be accepted from authorized DNS servers. By having DNS servers on different subnets,you may prevent both from going down,even if one of your networks goes down.
Why would you consider sending an email to an address that you know does not exist within the company you are performing a Penetration Test for?
A. To determine who is the holder of the root account
B. To perform a DoS
C. To create needless SPAM
D. To illicit a response back that will reveal information about email servers and how they treat undeliverable mail
E. To test for virus protection
Sending a bogus email is one way to find out more about internal servers. Also, to gather additional IP addresses and learn how they treat mail.
What tool can crack Windows SMB passwords simply by listening to network traffic?
Select the best answer.
A. This is not possible
This is possible with a SMB packet capture module for L0phtcrack and a known weaknesses in the LM hash algorithm.
A network admin contacts you. He is concerned that ARP spoofing or poisoning might occur on his network. What are some things he can do to prevent it?
Select the best answers.
A. Use port security on his switches.
B. Use a tool like ARPwatch to monitor for strange ARP activity.
C. Use a firewall between all LAN segments.
D. If you have a small network,use static ARP entries.
E. Use only static IP addresses on all PC’s.
By using port security on his switches,the switches will only allow the first MAC address that is connected to the switch to use that port,thus preventing ARP spoofing.ARPWatch is a tool that monitors for strange ARP activity. This may help identify ARP spoofing when it happens. Using firewalls between all LAN segments is possible and may help,but is usually pretty unrealistic.On a very small network,static ARP entries are a possibility. However,on a large network,this is not an realistic option. ARP spoofing doesn’t have anything to do with static or dynamic IP addresses. Thus,this option won’t help you.
Peter, a Network Administrator, has come to you looking for advice on a tool that would help him perform SNMP enquires over the network. Which of these tools would do the SNMP enumeration he is looking for?
Select the best answers.
D. Solarwinds IP Network Browser
SNMPUtil is a SNMP enumeration utility that is a part of the Windows 2000 resource kit. With SNMPUtil,you can retrieve all sort of valuable information through SNMP. SNScan is a SNMP network scanner by Foundstone. It does SNMP scanning to find open SNMP ports. Solarwinds IP Network Browser is a SNMPenumeration tool with a graphical tree-view of the remote machine’s SNMP data.
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?
B. Brute force
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.
Bob is doing a password assessment for one of his clients. Bob suspects that security policies are not in place. He also suspects that weak passwords are probably the norm throughout the company he is evaluating. Bob is familiar with password weaknesses and key loggers.
Which of the following options best represents the means that Bob can adopt to retrieve passwords from his clients hosts and servers?
A. Hardware,Software,and Sniffing.
B. Hardware and Software Keyloggers.
C. Passwords are always best obtained using Hardware key loggers.
D. Software only,they are the most effective.
Different types of keylogger planted into the environment would retrieve the passwords for Bob.
Study the snort rule given below: From the options below, choose the exploit against which this rule applies.
B. SQL Slammer
C. MS Blaster
MS Blaster scans the Internet for computers that are vulnerable to its attack. Once found,it tries to enter the system through the port 135 to create a buffer overflow. TCP ports 139 and 445 may also provide attack vectors.