> 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/suspicious-sso-access-from-asn.md).

# Suspicious SSO access from ASN

### Synopsis

| Field                | Value                                                                                                                                                               |
| -------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Activation Period    | 14 Days                                                                                                                                                             |
| Training Period      | 30 Days                                                                                                                                                             |
| Test Period          | N/A (single event)                                                                                                                                                  |
| Deduplication Period | 1 Day                                                                                                                                                               |
| Required Data        | <p>Requires one of the following data sources:<br>AzureAD OR Azure SignIn Log OR Idira OR Duo OR Google Workspace Authentication OR Okta OR OneLogin OR PingOne</p> |
| Detection Modules    | Identity Analytics                                                                                                                                                  |
| ATT\&CK Tactic       | Initial Access (TA0001)                                                                                                                                             |
| ATT\&CK Technique    | Valid Accounts: Domain Accounts (T1078.002)                                                                                                                         |
| Severity             | Informational                                                                                                                                                       |

### Description

A suspicious SSO authentication was made by a user.

### Attacker's Goals

Use an account that was possibly compromised to gain access to the network.

### Investigative actions

* Confirm that the activity is benign (e.g. the user has switched locations and providers).
* Verify if the ASN is an approved ASN to authenticate from.
* Follow further actions done by the user.

### Variations

<details>

<summary>Suspicious SSO access from ASN via a suspicious IP</summary>

**Synopsis**

| Field             | Value                                       |
| ----------------- | ------------------------------------------- |
| ATT\&CK Tactic    | Initial Access (TA0001)                     |
| ATT\&CK Technique | Valid Accounts: Domain Accounts (T1078.002) |
| Severity          | Low                                         |

**Description**

A suspicious SSO authentication was made by a user.

**Attacker's Goals**

Use an account that was possibly compromised to gain access to the network.

**Investigative actions**

* Confirm that the activity is benign (e.g. the user has switched locations and providers).
* Verify if the ASN is an approved ASN to authenticate from.
* Follow further actions done by the user.

</details>

<details>

<summary>Google Workspace - Suspicious SSO access from ASN</summary>

**Synopsis**

| Field             | Value                                       |
| ----------------- | ------------------------------------------- |
| ATT\&CK Tactic    | Initial Access (TA0001)                     |
| ATT\&CK Technique | Valid Accounts: Domain Accounts (T1078.002) |
| Severity          | Informational                               |

**Description**

A suspicious SSO authentication was made by a user.

**Attacker's Goals**

Use an account that was possibly compromised to gain access to the network.

**Investigative actions**

* Confirm that the activity is benign (e.g. the user has switched locations and providers).
* Verify if the ASN is an approved ASN to authenticate from.
* Follow further actions done by the user.

</details>


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