> 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-authentication-coercion.md).
# Possible authentication coercion
### Synopsis
| Field | Value |
| -------------------- | -------------------------------------------------------------------------------------------------------- |
| Activation Period | 14 Days |
| Training Period | 30 Days |
| Test Period | N/A (single event) |
| Deduplication Period | 1 Day |
| Required Data | XDR Agent with eXtended Threat Hunting (XTH) |
| Detection Modules | Identity Analytics |
| ATT\&CK Tactic | Credential Access (TA0006) |
| ATT\&CK Technique | Forced Authentication (T1187), Adversary-in-the-Middle: LLMNR/NBT-NS Poisoning and SMB Relay (T1557.001) |
| Severity | Informational |
### Description
An unusual Remote Procedure Call (RPC) was made to potentially cause authentication coercion.
### Attacker's Goals
* An attacker can abuse Remote Procedure Calls to coerce authentication from servers.
### Investigative actions
* Check for a suspicious process on the initiator.
* Check if the source host is a vulnerability scanner.
* Check for unusual connections from {actor\_remote\_ip} to other servers in the network.
* Check for logged-in users to {actor\_remote\_ip} and investigate their actions.
* Check for indicators of compromise on {actor\_remote\_ip}.
### Variations
Possible authentication coercion from an unconstrained delegation server to a sensitive server
**Synopsis**
| Field | Value |
| ----------------- | -------------------------------------------------------------------------------------------------------- |
| ATT\&CK Tactic | Credential Access (TA0006) |
| ATT\&CK Technique | Forced Authentication (T1187), Adversary-in-the-Middle: LLMNR/NBT-NS Poisoning and SMB Relay (T1557.001) |
| Severity | Medium |
**Description**
An unusual Remote Procedure Call (RPC) was made towards a sensitive server, to potentially cause authentication coercion.
**Attacker's Goals**
* An attacker can abuse Remote Procedure Calls to coerce authentication from servers.
**Investigative actions**
* Check for a suspicious process on the initiator.
* Check if the source host is a vulnerability scanner.
* Check for unusual connections from {actor\_remote\_ip} to other servers in the network.
* Check for logged-in users to {actor\_remote\_ip} and investigate their actions.
* Check for indicators of compromise on {actor\_remote\_ip}.
Possible authentication coercion to a sensitive server
**Synopsis**
| Field | Value |
| ----------------- | -------------------------------------------------------------------------------------------------------- |
| ATT\&CK Tactic | Credential Access (TA0006) |
| ATT\&CK Technique | Forced Authentication (T1187), Adversary-in-the-Middle: LLMNR/NBT-NS Poisoning and SMB Relay (T1557.001) |
| Severity | Low |
**Description**
An unusual Remote Procedure Call (RPC) was made towards a sensitive server, to potentially cause authentication coercion.
**Attacker's Goals**
* An attacker can abuse Remote Procedure Calls to coerce authentication from servers.
**Investigative actions**
* Check for a suspicious process on the initiator.
* Check if the source host is a vulnerability scanner.
* Check for unusual connections from {actor\_remote\_ip} to other servers in the network.
* Check for logged-in users to {actor\_remote\_ip} and investigate their actions.
* Check for indicators of compromise on {actor\_remote\_ip}.
---
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