Analytics Alerts

Browse the Cortex analytics alert reference.

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1 alert match the current filters. tactic: TA0009 ✕ technique: T1114 ✕

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  • Exchange user mailbox forwarding Low Identity Threat Module, SaaS Threat Detection, Email 2 variations

    A user configured Exchange SMTP forwarding on a mailbox, which forwards all emails sent to that mailbox to a specified recipient.

    Activation:
    14 Days
    Training:
    30 Days
    Test:
    N/A (single event)
    Deduplication:
    1 Day
    ATT&CK tactics: Collection (TA0009) Exfiltration (TA0010)
    ATT&CK techniques: Email Collection: Email Forwarding Rule (T1114.003) Automated Exfiltration (T1020) Email Collection (T1114)
    Required data: Office 365 Audit
    Attacker's goals: Leverage a compromised user account to modify a mailbox's settings to forward emails to an external recipient and collect sensitive information.
    Investigative actions: Look for signs that the user account and mailbox are compromised (e.g. abnormal logins, unusual activity). Check if the forwarding domain is an unknown external domain. Investigate the IP address associated with the rule. Follow further actions done by the account.

    Variations

    Exchange user mailbox forwarding by a delegate user

    Informational overridden

    A user configured Exchange SMTP forwarding on a mailbox, which forwards all emails sent to that mailbox to a specified recipient. The user who set the forwarding is a delegated user, who performed this action on behalf of another user. overridden

    Suspicious Exchange user mailbox forwarding

    Medium overridden

    A user configured Exchange SMTP forwarding on a mailbox, which forwards all emails sent to that mailbox to a specified recipient. overridden