This indicates an attempt to launch an ICMP reverse shell.
This signature detects ICMPSH, a popular ICMP reverse shell tool. ICMPSH allows an attacker to remotely control a target Windows machine and execute arbitrary commands, over ICMP protocol.
Any unprotected Windows system is vulnerable.
System Compromise: Remote attackers can gain control of vulnerable systems.
Monitor the traffic from that network for any suspicious activity.
Use AntiVirus software to scan and clean the system.