QUESTION: 249

Which of the following Exclusive OR transforms bits is NOT correct?

0 xor 0 = 0
1 xor 0 = 1
1 xor 1 = 1
0 xor 1 = 1

Answer(s): C

The traditional traceroute sends out ICMP ECHO packets with a TTL of one, and increments the TTL until the destination has been reached. By printing the gateways that generate ICMP time exceeded messages along the way, it is able to determine the path packets take to reach the destination. The problem is that with the widespread use of firewalls on the Internet today, many of the packets that traceroute sends out end up being filtered, making it impossible to completely trace the path to the destination.

How would you overcome the Firewall restriction on ICMP ECHO packets?

Firewalls will permit inbound TCP packets to specific ports that hosts sitting behind the firewall are listening for connections. By sending out TCP SYN packets instead of ICMP ECHO packets, traceroute can bypass the most common firewall filters.
Firewalls will permit inbound UDP packets to specific ports that hosts sitting behind the firewall are listening for connections. By sending out TCP SYN packets instead of ICMP ECHO packets,
traceroute can bypass the most common firewall filters.
Firewalls will permit inbound UDP packets to specific ports that hosts sitting behind the firewall are listening for connections. By sending out TCP SYN packets instead of ICMP ECHO packets, traceroute can bypass the most common firewall filters.
Do not use traceroute command to determine the path packets take to reach the destination instead use the custom hacking tool JOHNTHETRACER and run with the command c:\> JOHNTHETRACER www.eccouncil.org -F -evade

Answer(s): A

Reveal Solution Next Question

QUESTION: 251

Simon is security analyst writing signatures for a Snort node he placed internally that captures all mirrored traffic from his border firewall. From the following signature, what will Snort look for in the payload of the suspected packets?
alert tcp $EXTERNAL_NET any -> $HOME_NET 27374 (msG. "BACKDOOR SIG - SubSseven 22";flags:
A+; content: "|0d0a5b52504c5d3030320d0a|"; reference:arachnids, 485;) alert

The payload of 485 is what this Snort signature will look for.
Snort will look for 0d0a5b52504c5d3030320d0a in the payload.
Packets that contain the payload of BACKDOOR SIG - SubSseven 22 will be flagged.
From this snort signature, packets with HOME_NET 27374 in the payload will be flagged.

Answer(s): B

Reveal Solution Next Question

QUESTION: 252

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?

Convert the Trojan.exe file extension to Trojan.txt disguising as text file
Break the Trojan into multiple smaller files and zip the individual pieces
Change the content of the Trojan using hex editor and modify the checksum
Encrypt the Trojan using multiple hashing algorithms like MD5 and SHA-1

Answer(s): A

Reveal Solution Next Question

Free CPEH-001 Exam Braindumps (page: 63)

QUESTION: 249

QUESTION: 250

QUESTION: 251

QUESTION: 252