Analytics Medium

Possible AS-REP Roasting Attack

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.

Module:
Identity Analytics
Data source:
XDR Agent, XDR Agent with eXtended Threat Hunting (XTH)
ATT&CK tactics: Credential Access (TA0006)
ATT&CK techniques: Steal or Forge Kerberos Tickets: AS-REP Roasting (T1558.004)
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:
1 Hour
Deduplication:
1 Day
1 variation:
  • AS-REP Roasting Attack High (parent: Medium)