> 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/successful-universal-authentication-with-suspicious-features.md).
# Successful universal authentication with suspicious features
### Synopsis
| Field | Value |
| -------------------- | ----------------------- |
| Activation Period | 14 Days |
| Training Period | 30 Days |
| Test Period | N/A (single event) |
| Deduplication Period | 1 Day |
| Detection Modules | Identity Analytics |
| ATT\&CK Tactic | Initial Access (TA0001) |
| ATT\&CK Technique | Valid Accounts (T1078) |
| Severity | Informational |
### Description
A universal authentication was flagged as suspicious based on anomalous features.
### Attacker's Goals
Use an account that was possibly compromised to gain access to the network, while potentially using an anonymizing service to obfuscate their origin.
### Investigative actions
* Investigate the suspicious authentication.
* Verify if the ASN is an approved ASN to authenticate from.
* Follow further actions done by the user.
* If the IP is associated with a tunnel operator, check whether it is an approved VPN.
### Variations
Successful universal authentication sign-in from a TOR exit node
**Synopsis**
| Field | Value |
| ----------------- | ----------------------- |
| ATT\&CK Tactic | Initial Access (TA0001) |
| ATT\&CK Technique | Valid Accounts (T1078) |
| Severity | Medium |
**Description**
A successful sign-in from a TOR exit node in universal authentication.
**Attacker's Goals**
Use an account that was possibly compromised to gain access to the network, while potentially using an anonymizing service to obfuscate their origin.
**Investigative actions**
* Investigate the suspicious authentication.
* Verify if the ASN is an approved ASN to authenticate from.
* Follow further actions done by the user.
* If the IP is associated with a tunnel operator, check whether it is an approved VPN.
Successful universal authentication from a suspicious tunnel operator
**Synopsis**
| Field | Value |
| ----------------- | ----------------------- |
| ATT\&CK Tactic | Initial Access (TA0001) |
| ATT\&CK Technique | Valid Accounts (T1078) |
| Severity | Low |
**Description**
A successful universal authentication was made through a suspicious or rarely seen tunnel operator.
**Attacker's Goals**
Use an account that was possibly compromised to gain access to the network, while potentially using an anonymizing service to obfuscate their origin.
**Investigative actions**
* Investigate the suspicious authentication.
* Verify if the ASN is an approved ASN to authenticate from.
* Follow further actions done by the user.
* If the IP is associated with a tunnel operator, check whether it is an approved VPN.
Suspicious successful universal authentication from ASN
**Synopsis**
| Field | Value |
| ----------------- | ----------------------- |
| ATT\&CK Tactic | Initial Access (TA0001) |
| ATT\&CK Technique | Valid Accounts (T1078) |
| Severity | Informational |
**Description**
A successful universal authentication was made from a suspicious or previously unseen ASN.
**Attacker's Goals**
Use an account that was possibly compromised to gain access to the network, while potentially using an anonymizing service to obfuscate their origin.
**Investigative actions**
* Investigate the suspicious authentication.
* Verify if the ASN is an approved ASN to authenticate from.
* Follow further actions done by the user.
* If the IP is associated with a tunnel operator, check whether it is an approved VPN.
Successful universal authentication from a new country in organization
**Synopsis**
| Field | Value |
| ----------------- | ----------------------- |
| ATT\&CK Tactic | Initial Access (TA0001) |
| ATT\&CK Technique | Valid Accounts (T1078) |
| Severity | Informational |
**Description**
A user authenticated in universal authentication from an unusual country that no one from this organization has connected from before in universal authentication. This may indicate the account was compromised.
**Attacker's Goals**
Use an account that was possibly compromised to gain access to the network, while potentially using an anonymizing service to obfuscate their origin.
**Investigative actions**
* Investigate the suspicious authentication.
* Verify if the ASN is an approved ASN to authenticate from.
* Follow further actions done by the user.
* If the IP is associated with a tunnel operator, check whether it is an approved VPN.
---
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