> 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-encrypting-file-system-remote-call-efsrpc-to-domain-controller.md).

# Suspicious Encrypting File System Remote call (EFSRPC) to domain controller

### 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>Palo Alto Networks Firewall EAL Logs OR XDR Agent with eXtended Threat Hunting (XTH)</p> |
| ATT\&CK Tactic       | Lateral Movement (TA0008)                                                                                                                  |
| ATT\&CK Technique    | Use Alternate Authentication Material: Pass the Hash (T1550.002)                                                                           |
| Severity             | Medium                                                                                                                                     |

### Description

An Encrypting File System Remote call (EFSRPC) was made to a domain controller.

### Attacker's Goals

An attacker is attempting to steal credentials and move laterally within a network.

### Investigative actions

* Check for suspicious processes on the host.
* Check if the source host is a vulnerability scanner.
* Look for following suspicious connections using the DC machine account.


---

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