> For the complete documentation index, see [llms.txt](https://cortex-docs.paloaltonetworks.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cortex-docs.paloaltonetworks.com/analytics-alerts/alerts-by-name/sensitive-exchange-mail-sent-to-external-users.md).

# Sensitive Exchange mail sent to external users

### Synopsis

| Field                | Value                                                                    |
| -------------------- | ------------------------------------------------------------------------ |
| Activation Period    | 14 Days                                                                  |
| Training Period      | 30 Days                                                                  |
| Test Period          | 1 Hour                                                                   |
| Deduplication Period | 1 Day                                                                    |
| Required Data        | Office 365 Audit                                                         |
| Detection Modules    | Identity Threat Module, SaaS Threat Detection, Email                     |
| Detector Tags        | O365 DLP Analytics                                                       |
| ATT\&CK Tactic       | Collection (TA0009), Exfiltration (TA0010)                               |
| ATT\&CK Technique    | Email Collection (T1114), Exfiltration Over Alternative Protocol (T1048) |
| Severity             | Informational                                                            |

### Description

A user sent sensitive email messages to external users.

### Attacker's Goals

An attacker is attempting to collect sensitive email information.

### Investigative actions

* Look for signs that the user account and mailboxes are compromised (e.g. abnormal logins, unusual activity).
* Follow further actions done by the account.
* Look for unusual email patterns from the affected mailbox (e.g. unusual email contents).
* Examine the user's email activity history for suspicious behavior.

### Variations

<details>

<summary>Exchange mail to external account matching high severity DLP rules</summary>

**Synopsis**

| Field             | Value                                                                    |
| ----------------- | ------------------------------------------------------------------------ |
| ATT\&CK Tactic    | Collection (TA0009), Exfiltration (TA0010)                               |
| ATT\&CK Technique | Email Collection (T1114), Exfiltration Over Alternative Protocol (T1048) |
| Severity          | Low                                                                      |

**Description**

A user sent sensitive email messages to external users.

**Attacker's Goals**

An attacker is attempting to collect sensitive email information.

**Investigative actions**

* Look for signs that the user account and mailboxes are compromised (e.g. abnormal logins, unusual activity).
* Follow further actions done by the account.
* Look for unusual email patterns from the affected mailbox (e.g. unusual email contents).
* Examine the user's email activity history for suspicious behavior.

</details>

<details>

<summary>Sensitive Exchange mail sent to an external user</summary>

**Synopsis**

| Field             | Value                                                                    |
| ----------------- | ------------------------------------------------------------------------ |
| ATT\&CK Tactic    | Collection (TA0009), Exfiltration (TA0010)                               |
| ATT\&CK Technique | Email Collection (T1114), Exfiltration Over Alternative Protocol (T1048) |
| Severity          | Low                                                                      |

**Description**

A user sent sensitive email messages to external users.

**Attacker's Goals**

An attacker is attempting to collect sensitive email information.

**Investigative actions**

* Look for signs that the user account and mailboxes are compromised (e.g. abnormal logins, unusual activity).
* Follow further actions done by the account.
* Look for unusual email patterns from the affected mailbox (e.g. unusual email contents).
* Examine the user's email activity history for suspicious behavior.

</details>


---

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