Analytics Alerts

Browse the Cortex analytics alert reference.

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1 alert match the current filters. technique: T1566 ✕

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  • Rarely seen sender domain in the organization Informational Email

    An email was received from a domain that has not been observed in the organization in the last 30 days.

    Activation:
    14 Days
    Training:
    30 Days
    Test:
    N/A (single event)
    Deduplication:
    1 Day
    ATT&CK tactics: Reconnaissance (TA0043) Initial Access (TA0001)
    ATT&CK techniques: Phishing for Information (T1598) Phishing (T1566)
    Required data: Microsoft 365 Emails
    Attacker's goals: Aim to steal sensitive information Trick recipients into downloading harmful payloads Aim to gain unauthorized access to the organization's systems.
    Investigative actions: Check the email address for any unusual spellings, missing letters, or unknown domains. If the message contains attachments or links, scrutinize them for any suspicious indications. Monitor further actions taken, such as file downloads or access to potentially malicious links.