ECCouncil Updated 312-50v13 Exam Questions and Answers by ernie

In CEH v13 Module 06: Malware Threats, the Cyber Kill Chain is broken down into its seven stages:

Reconnaissance

Weaponization

Delivery

Exploitation

Installation

Command & Control

Actions on Objectives

Step 3 – Delivery:

Refers to the transmission of the malicious payload to the victim.

Can occur through email, web downloads, USB drives, etc.

Correct Example:

A. “An intruder sends a malicious attachment via email to a target” — This is delivery.

Other Options:

B. Weaponization

C. Exploitation

D. Installation

Comprehensive and Detailed Explanation:

Subnet 10.1.4.0/23 includes addresses from:

10.1.4.0 to 10.1.5.255

Total = 512 IPs (510 usable)

Last 100 usable IPs would be:

Start: 10.1.5.155 to 10.1.5.254

Only option C (10.1.5.200) falls within that range.

From CEH v13 Courseware:

Module 3: Subnetting & IP Addressing

A digital signature is created by hashing the document and encrypting that hash with the sender’s private key. Since the hash is specific to the original content, any change to the document invalidates the signature, making it non-transferable to another document.

Reference – CEH v13 Official Study Guide:

Module 20: Cryptography

Quote:

“Digital signatures are based on hashing the document and signing the digest with the private key. This makes each signature unique to the document and ensures tamper resistance.”

Incorrect Options:

B. Incorrect — signature is tied to one document.

C. Hashes are not plain; they are encrypted.

D. Keys can be reused, but signatures are document-specific.

Banner grabbing is a technique wont to gain info about a computer system on a network and the services running on its open ports. administrators will use this to take inventory of the systems and services on their network. However, an to find will use banner grabbing so as to search out network hosts that are running versions of applications and operating systems with known exploits.

Some samples of service ports used for banner grabbing are those used by Hyper Text Transfer Protocol (HTTP), File Transfer Protocol (FTP), and Simple Mail Transfer Protocol (SMTP); ports 80, 21, and 25 severally. Tools normally used to perform banner grabbing are Telnet, nmap and Netcat.

For example, one may establish a connection to a target internet server using Netcat, then send an HTTP request. The response can usually contain info about the service running on the host:

This information may be used by an administrator to catalog this system, or by an intruder to narrow down a list of applicable exploits.

To prevent this, network administrators should restrict access to services on their networks and shut down unused or unnecessary services running on network hosts. Shodan is a search engine for banners grabbed from portscanning the Internet.