Analytics Alerts

Browse the Cortex analytics alert reference.

Severity ▾
Detection module ▾
Data source ▾

1 alert match the current filters. technique: T1110 ✕

Download CSV Show ATT&CK heatmap
  • Sudden spike in outbound email volume Informational Email 2 variations

    Unusual amount of emails sent by an internal sender to one or more external recipients within a short timeframe.

    Activation:
    14 Days
    Training:
    30 Days
    Test:
    1 Hour
    Deduplication:
    2 Hours
    ATT&CK tactics: Execution (TA0002) Credential Access (TA0006)
    ATT&CK techniques: User Execution (T1204) Brute Force: Password Cracking (T1110.002)
    Required data: Microsoft 365 Emails
    Attacker's goals: Extracting valuable information outside the company. Bypass Data Loss Prevention (DLP) by splitting data across multiple emails.
    Investigative actions: Check the content of the email that was sent. Review the external recipient address and assess its reputation. Review past emails sent from this mailbox for any suspicious activity. Check for unusual emails sent to this recipient's address. Monitor further action taken, such as accessing to private keys, API tokens and sensitive data.

    Variations

    Sudden spike in outbound emails sent to external recipients

    Informational overridden

    Unusual amount of emails sent by an internal sender to one or more external recipients within a short timeframe. overridden

    Sudden spike in outbound emails sent to internal recipients

    Informational overridden

    Unusual amount of emails sent by an internal sender to one or more external recipients within a short timeframe. overridden