Possible AS-REP Roasting Attack

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	1 Hour
Deduplication Period	1 Day
Required Data	Requires all of the following: XDR Agent XDR Agent with eXtended Threat Hunting (XTH)
Detection Modules	Identity Analytics
ATT&CK Tactic	Credential Access (TA0006)
ATT&CK Technique	Steal or Forge Kerberos Tickets: AS-REP Roasting (T1558.004)
Severity	Medium

Description

A user enumerated all accounts that don't require pre-authentication in the organization and specifically requested tickets for those accounts. This is typically a sign of an AS-REP Roasting attack.

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.

Variations

AS-REP Roasting Attack

Synopsis

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

Description

A user enumerated all accounts that don't require pre-authentication in the organization and specifically requested tickets for those accounts. This is typically a sign of an AS-REP Roasting attack.

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.