Multiple TGT requests for users without Kerberos pre-authentication

Cortex XDR Analytics Alert Reference by data source

Product

Cortex XDR

Last date published

2024-12-03

Activation Period	14 Days
Training Period	30 Days
Test Period	10 Minutes
Deduplication Period	1 Day
Required Data	Requires one of the following data sources: Windows Event Collector OR XDR Agent with eXtended Threat Hunting (XTH)
Detection Modules	Identity Analytics
Detector Tags
ATT&CK Tactic	Credential Access (TA0006)
ATT&CK Technique	Steal or Forge Kerberos Tickets: AS-REP Roasting (T1558.004)
Severity	Informational

Multiple TGT requests for users that do not require Kerberos pre-authentication were observed. This is typically a sign of an AS-REP attack.

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

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

ATT&CK Tactic	Credential Access (TA0006)
ATT&CK Technique	Steal or Forge Kerberos Tickets: AS-REP Roasting (T1558.004)
Severity	Low

Multiple TGT requests for users that do not require Kerberos pre-authentication were observed. This is typically a sign of an AS-REP attack.

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

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

ATT&CK Tactic	Credential Access (TA0006)
ATT&CK Technique	Steal or Forge Kerberos Tickets: AS-REP Roasting (T1558.004)
Severity	Informational

A TGT request was sent for a user who does not require Kerberos pre-authentication. This might indicate an AS-REP attack.

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

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