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Mastering Active Directory, Third Edition - Third Edition

You're reading from  Mastering Active Directory, Third Edition - Third Edition

Product type Book
Published in Nov 2021
Publisher Packt
ISBN-13 9781801070393
Pages 780 pages
Edition 3rd Edition
Languages
Concepts
Author (1):
Dishan Francis Dishan Francis
Profile icon Dishan Francis

Table of Contents (22) Chapters

Preface 1. Active Directory Fundamentals 2. Active Directory Domain Services 2022 3. Designing an Active Directory Infrastructure 4. Active Directory Domain Name System 5. Placing Operations Master Roles 6. Migrating to Active Directory 2022 7. Managing Active Directory Objects 8. Managing Users, Groups, and Devices 9. Designing the OU Structure 10. Managing Group Policies 11. Active Directory Services – Part 01 12. Active Directory Services – Part 02 13. Active Directory Certificate Services 14. Active Directory Federation Services 15. Active Directory Rights Management Services 16. Active Directory Security Best Practices 17. Advanced AD Management with PowerShell 18. Hybrid Identity 19. Active Directory Audit and Monitoring 20. Other Books You May Enjoy
21. Index

Pass-the-hash attacks

If a client needs to authenticate into a server successfully, the client needs to prove their identity. This is done by using a username and password. The client needs to present its username and password to the authentication server, and it will verify the identity. There are legacy protocols and systems that send this information in cleartext, even in an open network. Telnet is a good example of this. If someone is listening to traffic (packet capturing) on a Telnet session, they can easily capture a password as it is transmitted in cleartext.

Modern authentication protocols are well aware of these types of threats and use different technologies to encrypt credentials or create cryptographic hashes for identity verification. Cryptographic hash means a password string is transformed into a fixed-length digest using an algorithm.

Earlier, in the Authentication in an AD environment section, we saw how Kerberos authentication works using hash values. When...

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