Analytics Low
✕

A user sent multiple TGT requests to irregular service

A user sent multiple TGT requests to services other than KRBTGT and KADMIN. This is typically a sign of a Kerberoasting attack.

Module:
Identity Analytics
Data source:
Windows Event Collector, XDR Agent with eXtended Threat Hunting (XTH)
ATT&CK tactics: Credential Access (TA0006)
ATT&CK techniques: Steal or Forge Kerberos Tickets: Kerberoasting (T1558.003)
Attacker's goals:

Crack account credentials by obtaining an easy-to-crack Kerberos ticket.

Investigative actions:

Check who used the host at the time of the alert, to rule out a benign service or tool requesting weak Kerberos encryption.

Test period:
10 Minutes
Deduplication:
1 Day
2 variations:
  • A user sent an excessive number of TGT requests to irregular services Medium (parent: Low)
  • A user sent a TGT request to irregular service Informational (parent: Low)