alert icmp any any -> any any (msg:"ET MALWARE Storm Worm ICMP DDOS Traffic"; itype:8; icode:0; dsize:32; content:"abcdefghijklmnopqr|00 00|"; depth:22; threshold:type both, track by_src, count 1, seconds 60; classtype:trojan-activity; sid:2007618; rev:6; metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)