Kerberoasting

Retrieve the Kerberos 5 TGS-REP etype 23 hash using Kerberoasting

You can retrieve the Kerberos 5 TGS-REP etype 23 hash using Kerberoasting technique

The goal of Kerberoasting is to harvest TGS tickets for services that run on behalf of user accounts in the AD, not computer accounts. Thus, part of these TGS tickets is encrypted with keys derived from user passwords. As a consequence, their credentials could be cracked offline. More detail in Kerberos theory.

To perfom this attack, you need an account on the domain

nxc ldap 192.168.0.104 -u harry -p pass --kerberoasting output.txt

Cracking with hashcat

hashcat -m13100 output.txt wordlist.txt

Example

Active machine is a good example to test Kerberoasting with NetExec

https://www.hackthebox.eu/home/machines/profile/148www.hackthebox.eu

Useful ressources:

Kerberos (II): How to attack Kerberos?Tarlogic Security

KerberoastingRed Teaming Experiments

Kerberoastinghackndo