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 inbox forwarding rule configured Informational Identity Threat Module, SaaS Threat Detection, Email 3 variations

    A user configured an Exchange inbox forwarding rule, which forwards emails that meet specific conditions.

    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: Create an inbox rule using a compromised user account to automatically forward emails containing specific conditions to an external recipient.
    Investigative actions: Check what conditions are met in the inbox rule (e.g. specific keywords in the subject or body). Determine if any of the conditions and keywords look suspicious. 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 and look up its reputation. Investigate the IP address associated with the rule. Follow further actions done by the account. Check for a possible phishing campaign on the organization. Look for emails sent to this recipient by other users.

    Variations

    Exchange inbox forwarding rule configured by a delegate user

    Informational overridden

    A user configured an Exchange inbox forwarding rule, which forwards emails that meet specific conditions. The user who set the forwarding is a delegated user, who performed this action on behalf of another user. overridden

    Suspicious Exchange inbox forwarding rule configured

    Medium overridden

    A user configured an Exchange inbox forwarding rule, which forwards emails that meet specific conditions. overridden

    External Exchange inbox forwarding rule configured

    Low overridden

    A user configured an Exchange inbox forwarding rule, which forwards emails that meet specific conditions. The rule forwards emails to a public domain, which may be a sign of compromise. overridden