alert icmp $EXTERNAL_NET any -> $HOME_NET any (msg:"GPL ICMP_INFO PING Seer Windows"; itype:8; content:"|88 04| "; depth:32; reference:arachnids,166; classtype:misc-activity; sid:2100380; rev:8; metadata:created_at 2010_09_23, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)