Analytics Alerts

Browse the Cortex analytics alert reference.

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2 alerts match the current filters. technique: T1110 ✕

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  • Kerberos Pre-Auth Failures by Host Low

    The endpoint failed an unusual number of Kerberos pre-authentications (TGT requests) from at least three users when compared to its baseline. This can indicate a password-spraying attack.

    Activation:
    14 Days
    Training:
    30 Days
    Test:
    10 Minutes
    Deduplication:
    1 Hour
    ATT&CK tactics: Credential Access (TA0006)
    ATT&CK techniques: Brute Force (T1110)
    Required data: Palo Alto Networks Firewall traffic Logs XDR Agent
    Attacker's goals: The attacker is attempting to gain an initial foothold in the domain using a list of valid users and a guessed password.
    Investigative actions: Verify whether the host that generated the alert is normally used by many users (for example, a terminal server). Verify any later authentication success for the user accounts referenced by the alert, as these can indicate the attacker managed to guess the credentials.
  • Suspicious Kerberos Pre-Auth Failures by Host Low Identity Analytics

    An endpoint failed unusual number of Kerberos pre-authentications (TGT requests) which may indicate a password-spraying attack.

    Activation:
    14 Days
    Training:
    30 Days
    Test:
    10 Minutes
    Deduplication:
    1 Day
    ATT&CK tactics: Credential Access (TA0006)
    ATT&CK techniques: Brute Force: Password Spraying (T1110.003)
    Required data: XDR Agent with eXtended Threat Hunting (XTH)
    Attacker's goals: The attacker is attempting to gain an initial foothold in the domain using a list of valid users and a guessed password.
    Investigative actions: Identify the source host from which the failed logons originated, by making sure the IP is not a shared address. Review source host activity to detect any additional suspicious or lateral movement behavior. Correlate successful logons from the source host to identify potential account compromises following the failed attempts.