Synopsis
Activation Period |
14 Days |
Training Period |
30 Days |
Test Period |
10 Minutes |
Deduplication Period |
1 Day |
Required Data |
|
Detection Modules |
|
Detector Tags |
|
ATT&CK Tactic |
|
ATT&CK Technique |
|
Severity |
Informational |
Description
The user account on this host failed Kerberos pre-authentications (TGT requests) an unusual number of times.
This can indicate a Kerberos brute-force attack.
Attacker's Goals
The attacker is attempting to guess the credentials for the user account.
Investigative actions
- Verify that the password for the account has not been changed recently, without updating the user or the program using it.
- Verify any later authentication success for the user accounts referenced by the alert, as these can indicate the attacker managed to guess the credentials.