> 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/possible-external-rdp-brute-force.md).
# Possible external RDP Brute-Force
### Synopsis
| Field | Value |
| -------------------- | ------------------------------------------ |
| Activation Period | 14 Days |
| Training Period | 30 Days |
| Test Period | 10 Minutes |
| Deduplication Period | 1 Day |
| Required Data | XDR Agent |
| Detection Modules | Identity Analytics |
| ATT\&CK Tactic | Credential Access (TA0006) |
| ATT\&CK Technique | Brute Force: Password Guessing (T1110.001) |
| Severity | Low |
### Description
Multiple failed remote logins originated from an external IP with at least one successful login. This may indicate a successful brute-force attack.
### Attacker's Goals
The attacker attempts to gain access to the accounts.
### Investigative actions
* If the source IP is an internal IP, adjust network IP ranges.
* Identify the user performing RDP and check that it is authorized.
* Check whether this IP has a malicious reputation.
* Reset the user's password.
* Follow further actions done by the user.
### Variations
Possible external RDP Brute-Force on a Honey User Account
**Synopsis**
| Field | Value |
| ----------------- | ------------------------------------------ |
| ATT\&CK Tactic | Credential Access (TA0006) |
| ATT\&CK Technique | Brute Force: Password Guessing (T1110.001) |
| Severity | Medium |
**Description**
Multiple failed remote logins originated from an external IP with at least one successful login. This may indicate a successful brute-force attack.
**Attacker's Goals**
The attacker attempts to gain access to the accounts.
**Investigative actions**
* If the source IP is an internal IP, adjust network IP ranges.
* Identify the user performing RDP and check that it is authorized.
* Check whether this IP has a malicious reputation.
* Reset the user's password.
* Follow further actions done by the user.
Potential External Brute-Force via RDP on Sensitive User
**Synopsis**
| Field | Value |
| ----------------- | ------------------------------------------ |
| ATT\&CK Tactic | Credential Access (TA0006) |
| ATT\&CK Technique | Brute Force: Password Guessing (T1110.001) |
| Severity | Medium |
**Description**
Multiple failed remote logins from an external IP with a sensitive user and at least one successful login. This may indicate a successful brute-force attack.
**Attacker's Goals**
The attacker attempts to gain access to the accounts.
**Investigative actions**
* If the source IP is an internal IP, adjust network IP ranges.
* Identify the user performing RDP and check that it is authorized.
* Check whether this IP has a malicious reputation.
* Reset the user's password.
* Follow further actions done by the user.
---
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