> 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/multiple-uncommon-ssh-servers-with-the-same-server-host-key.md).

# Multiple uncommon SSH Servers with the same Server host key

### 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 all of the following:<br>Palo Alto Networks Firewall EAL Logs<br>XDR Agent</p> |
| ATT\&CK Tactic       | Credential Access (TA0006)                                                                 |
| ATT\&CK Technique    | Adversary-in-the-Middle (T1557)                                                            |
| Severity             | Low                                                                                        |

### Description

Multiple uncommon SSH servers were observed using the same host key.

### Attacker's Goals

Attackers may attempt to move laterally within the network by exploiting and relaying stolen client credentials to another SSH server.

### Investigative actions

* Audit the authentication attempts to the SSH server using the same key.
* Look for unusual or repeated connections from the same or unexpected hosts.
* Audit Client Credentials, check for any signs of compromised client credentials being used on different SSH servers.


---

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