PROTOCOL-ICMP -- Snort alerted on Internet Control Message Protocol (ICMP) traffic, which allows hosts to send error messages about interruptions in traffic. Administrators can use ICMP to perform diagnostics and troubleshooting, but the protocol can also be used by attackers to gain information on a network. This protocol is vulnerable to several attacks, and many administrators block it altogether, or block selective messages.
PROTOCOL-ICMP Unusual PING detected
The rule looks for PING traffic coming into the network that doesn't follow the normal format of a PING.
This rule will trigger when anomalous PING traffic is seen.
No public information
No known false positives
Cisco Talos Intelligence Group
No rule groups
None
No information provided
None
Tactic: Discovery
Technique: Network Sniffing
For reference, see the MITRE ATT&CK vulnerability types here: https://attack.mitre.org
©2025 Cisco and/or its affiliates. Snort, the Snort and Pig logo are registered trademarks of Cisco. All rights reserved.
