Steal or Forge Kerberos Tickets: Золотой билет Kerberos
Other sub-techniques of Steal or Forge Kerberos Tickets (4)
Adversaries who have the KRBTGT account password hash may forge Kerberos ticket-granting tickets (TGT), also known as a golden ticket.(Citation: AdSecurity Kerberos GT Aug 2015) Golden tickets enable adversaries to generate authentication material for any account in Active Directory.(Citation: CERT-EU Golden Ticket Protection) Using a golden ticket, adversaries are then able to request ticket granting service (TGS) tickets, which enable access to specific resources. Golden tickets require adversaries to interact with the Key Distribution Center (KDC) in order to obtain TGS.(Citation: ADSecurity Detecting Forged Tickets) The KDC service runs all on domain controllers that are part of an Active Directory domain. KRBTGT is the Kerberos Key Distribution Center (KDC) service account and is responsible for encrypting and signing all Kerberos tickets.(Citation: ADSecurity Kerberos and KRBTGT) The KRBTGT password hash may be obtained using OS Credential Dumping and privileged access to a domain controller.
Примеры процедур |
|
| Название | Описание |
|---|---|
| Ke3chang |
Ke3chang has used Mimikatz to generate Kerberos golden tickets.(Citation: NCC Group APT15 Alive and Strong) |
| Empire |
Empire can leverage its implementation of Mimikatz to obtain and use golden tickets.(Citation: Github PowerShell Empire) |
| Mimikatz |
Mimikatz's kerberos module can create golden tickets.(Citation: GitHub Mimikatz kerberos Module)(Citation: Cobalt Strike Manual 4.3 November 2020) |
Контрмеры |
|
| Контрмера | Описание |
|---|---|
| Privileged Account Management |
Manage the creation, modification, use, and permissions associated to privileged accounts, including SYSTEM and root. |
| Active Directory Configuration |
Configure Active Directory to prevent use of certain techniques; use SID Filtering, etc. |
Обнаружение
Monitor for anomalous Kerberos activity, such as malformed or blank fields in Windows logon/logoff events (Event ID 4624, 4672, 4634), RC4 encryption within TGTs, and TGS requests without preceding TGT requests.(Citation: ADSecurity Kerberos and KRBTGT)(Citation: CERT-EU Golden Ticket Protection)(Citation: Stealthbits Detect PtT 2019) Monitor the lifetime of TGT tickets for values that differ from the default domain duration.(Citation: Microsoft Kerberos Golden Ticket) Monitor for indications of Pass the Ticket being used to move laterally.
Ссылки
- Microsoft. (2015, March 24). Kerberos Golden Ticket Check (Updated). Retrieved February 27, 2020.
- Jeff Warren. (2019, February 19). How to Detect Pass-the-Ticket Attacks. Retrieved February 27, 2020.
- Sean Metcalf. (2014, November 10). Kerberos & KRBTGT: Active Directory’s Domain Kerberos Service Account. Retrieved January 30, 2020.
- Metcalf, S. (2015, May 03). Detecting Forged Kerberos Ticket (Golden Ticket & Silver Ticket) Use in Active Directory. Retrieved December 23, 2015.
- Abolins, D., Boldea, C., Socha, K., Soria-Machado, M. (2016, April 26). Kerberos Golden Ticket Protection. Retrieved July 13, 2017.
- Metcalf, S. (2015, August 7). Kerberos Golden Tickets are Now More Golden. Retrieved December 1, 2017.
- Smallridge, R. (2018, March 10). APT15 is alive and strong: An analysis of RoyalCli and RoyalDNS. Retrieved April 4, 2018.
- Schroeder, W., Warner, J., Nelson, M. (n.d.). Github PowerShellEmpire. Retrieved April 28, 2016.
- Strategic Cyber LLC. (2020, November 5). Cobalt Strike: Advanced Threat Tactics for Penetration Testers. Retrieved April 13, 2021.
- Deply, B., Le Toux, V.. (2016, June 5). module ~ kerberos. Retrieved March 17, 2020.
- UCF. (n.d.). The password for the krbtgt account on a domain must be reset at least every 180 days. Retrieved November 5, 2020.
Связанные риски
Каталоги
Мы используем cookie-файлы, чтобы получить статистику, которая помогает нам улучшить сервис для вас с целью персонализации сервисов и предложений. Вы может прочитать подробнее о cookie-файлах или изменить настройки браузера. Продолжая пользоваться сайтом, вы даёте согласие на использование ваших cookie-файлов и соглашаетесь с Политикой обработки персональных данных.