Joseph was the Web site administrator for the Mason Insurance in New York, who’s main Web
site was located at www.masonins.com. Joseph uses his laptop computer regularly to administer
the Web site.
One night, Joseph received an urgent phone call from his friend, Smith. According to Smith, the
main Mason Insurance web site had been vandalized! All of its normal content was removed and
replaced with an attacker’s message ”Hacker Message: You are dead! Freaks!
From his office, which was directly connected to Mason Insurance’s internal network, Joseph
surfed to the Web site using his laptop. In his browser, the Web site looked completely intact. No
changes were apparent. Joseph called a friend of his at his home to help troubleshoot the
problem. The Web site appeared defaced when his friend visited using his DSL connection. So,
while Smith and his friend could see the defaced page, Joseph saw the intact Mason Insurance
web site. To help make sense of this problem, Joseph decided to access the Web site using his
dial-up ISP. He disconnected his laptop from the corporate internal network and used his modem
to dial up the same ISP used by Smith.
After his modem connected, he quickly typed www.masonins.com in his browser to reveal the
following web page:
H@cker Mess@ge:

Y0u @re De@d! Fre@ks!
After seeing the defaced Web site, he disconnected his dial-up line, reconnected to the internal
network, and used Secure Shell (SSH) to log in directly to the Web server. He ran Tripwire against
the entire Web site, and determined that every system file and all the Web content on the server
were intact.
How did the attacker accomplish this hack?

Which of the following tools are used for enumeration? (Choose three.)

What did the following commands determine?

C: user2sid \earth guest
S-1-5-21-343818398-789336058-1343024091-501
C:sid2user 5 21 343818398 789336058 1343024091 500
Name is Joe
Domain is EARTH

Which definition among those given below best describes a covert channel?

Susan has attached to her company’s network. She has managed to synchronize her boss’s
sessions with that of the file server. She then intercepted his traffic destined for the server,
changed it the way she wanted to and then placed it on the server in his home directory. What
kind of attack is Susan carrying on?

Eric has discovered a fantastic package of tools named Dsniff on the Internet. He has learnt to use
these tools in his lab and is now ready for real world exploitation. He was able to effectively
intercept communications between the two entities and establish credentials with both sides of the
connections. The two remote ends of the communication never notice that Eric is relaying the
information between the two.
What would you call this attack?

Eve is spending her day scanning the library computers. She notices that Alice is using a
computer whose port 445 is active and listening. Eve uses the ENUM tool to enumerate Alice
machine. From the command prompt, she types the following command.
For /f “tokens=1 %%a in (hackfile.txt) do net use * \\10.1.2.3\c$ /user:”Administrator” %%a
What is Eve trying to do?

Which of the following represents the initial two commands that an IRC client sends to join an IRC
network?

Null sessions are un-authenticated connections (not using a username or password.) to an NT or
2000 system. Which TCP and UDP ports must you filter to check null sessions on your network?

Exhibit:

Study the following log extract and identify the attack.