> 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/usage-of-homograph-characters-detected-in-an-email-attachment-s-name.md).

# Usage of homograph characters detected in an email attachment(s) name

### Synopsis

| Field                | Value                                                              |
| -------------------- | ------------------------------------------------------------------ |
| Activation Period    | 14 Days                                                            |
| Training Period      | 30 Days                                                            |
| Test Period          | N/A (single event)                                                 |
| Deduplication Period | 1 Day                                                              |
| Required Data        | Microsoft 365 Emails                                               |
| Detection Modules    | Email                                                              |
| Detector Tags        | Evasion, Phishing                                                  |
| ATT\&CK Tactic       | Execution (TA0002), Credential Access (TA0006)                     |
| ATT\&CK Technique    | User Execution (T1204), Brute Force: Password Cracking (T1110.002) |
| Severity             | Informational                                                      |

### Description

Detected characters resembling Latin letters within an email attachment(s) name. This method could be used as a method to evade text or file scanners and analyzers.

### Attacker's Goals

Evade file scanner defenses, tricking recipients into running malicious attachments.

### Investigative actions

* Examine the sender's IP address and reputation.
* Verify whether the sender's IP address has appeared in different log sources before, and if it is recognizable.
* Check the domain the email came from, and if this domain is recognized within the organization.
* Scrutinize the attachments related to the email message.
* Monitor file-related actions taken related to the attachment.

### Variations

<details>

<summary>Usage of homograph characters detected in an email attachment(s) extension</summary>

**Synopsis**

| Field             | Value                                                              |
| ----------------- | ------------------------------------------------------------------ |
| ATT\&CK Tactic    | Execution (TA0002), Credential Access (TA0006)                     |
| ATT\&CK Technique | User Execution (T1204), Brute Force: Password Cracking (T1110.002) |
| Severity          | Low                                                                |

**Description**

Detected non-latin characters within an email attachment's extension(s). Detected characters resembling Latin letters within an email attachment(s) name. This method could be used as a method to evade text or file scanners and analyzers.

**Attacker's Goals**

Evade file scanner defenses, tricking recipients into running malicious attachments.

**Investigative actions**

* Examine the sender's IP address and reputation.
* Verify whether the sender's IP address has appeared in different log sources before, and if it is recognizable.
* Check the domain the email came from, and if this domain is recognized within the organization.
* Scrutinize the attachments related to the email message.
* Monitor file-related actions taken related to the attachment.

</details>


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