Book Image

Nmap: Network Exploration and Security Auditing Cookbook - Second Edition

By : Paulino Calderon
Book Image

Nmap: Network Exploration and Security Auditing Cookbook - Second Edition

By: Paulino Calderon

Overview of this book

This is the second edition of ‘Nmap 6: Network Exploration and Security Auditing Cookbook’. A book aimed for anyone who wants to master Nmap and its scripting engine through practical tasks for system administrators and penetration testers. Besides introducing the most powerful features of Nmap and related tools, common security auditing tasks for local and remote networks, web applications, databases, mail servers, Microsoft Windows machines and even ICS SCADA systems are explained step by step with exact commands and argument explanations. The book starts with the basic usage of Nmap and related tools like Ncat, Ncrack, Ndiff and Zenmap. The Nmap Scripting Engine is thoroughly covered through security checks used commonly in real-life scenarios applied for different types of systems. New chapters for Microsoft Windows and ICS SCADA systems were added and every recipe was revised. This edition reflects the latest updates and hottest additions to the Nmap project to date. The book will also introduce you to Lua programming and NSE script development allowing you to extend further the power of Nmap.
Table of Contents (25 chapters)
Title Page
Credits
About the Author
Acknowledgments
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
13
Brute Force Password Auditing Options
17
References and Additional Reading

Scrapping e-mail accounts from web servers   


Finding valid e-mail accounts is an important task during a penetration test. E-mail accounts are often used as usernames in some systems and web applications. Attackers often target the highly sensitive information that is stored in them. Compromising e-mail access credentials often means access to more sensitive information.

This recipe shows you how to use Nmap to discover valid e-mail accounts that could be used in latter attacks.

How to do it…

To collect valid e-mail addresses from the web servers, use the following command:

$nmap -p80 --script http-grep --script-args http-grep.builtins=e-mail <target>

The e-mail addresses found in the web server will be included in the script output:

   PORT    STATE SERVICE REASON
   443/tcp open  https  syn-ack
   | http-grep:
   |   (1) https://www.packtpub.com/books/subscription/mapt-b2b:
   |     (1) e-mail:
   |       + [email protected]
   |   (2) https://www.packtpub.com/books/info/packt...