Suspicious Print System Remote Protocol usage by a process

Cortex XDR Analytics Alert Reference by Alert name

Cortex XDR
Last date published
Analytics Alert Reference
Alert name


Activation Period

14 Days

Training Period

30 Days

Test Period

N/A (single event)

Deduplication Period

1 Day

Required Data

  • Requires:
    • XDR Agent with eXtended Threat Hunting (XTH)

Detection Modules

Identity Analytics

ATT&CK Tactic

Credential Access (TA0006)

ATT&CK Technique

Forced Authentication (T1187)




A host which is trusted for unconstrained delegation initiated an SMB connection to a DC using the Print System Remote Protocol. An attacker can abuse such sessions for relay attacks.

Attacker's Goals

Elevate privileges from standard domain user to domain admin.

Investigative actions

  • Check if the domain controller is patched or vulnerable to the attack.
  • Check if the suspected account is compromised.
  • Check if the source machine is trusted for unconstrained delegation and verify that the machine's configuration should stay that way.
  • Follow actions by the account and if it performed a DCSync.