> 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-icmp-traffic-that-resembles-smurf-attack.md).

# Suspicious ICMP traffic that resembles smurf attack

### Synopsis

| Field                | Value                                                                                               |
| -------------------- | --------------------------------------------------------------------------------------------------- |
| Activation Period    | 14 Days                                                                                             |
| Training Period      | 30 Days                                                                                             |
| Test Period          | 1 Hour                                                                                              |
| Deduplication Period | 1 Day                                                                                               |
| Required Data        | XDR Agent                                                                                           |
| ATT\&CK Tactic       | Impact (TA0040)                                                                                     |
| ATT\&CK Technique    | Endpoint Denial of Service: Service Exhaustion Flood (T1499.002), Network Denial of Service (T1498) |
| Severity             | Low                                                                                                 |

### Description

ICMP smurf attack was used.

### Attacker's Goals

Attempt to perform a denial-of-service attack by network exhaustion.

### Investigative actions

* Check if the ICMP message to broadcast was used for a legitimate reason.
* If not, check for denial-of-service impact on the subnet.


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