alert icmp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE PingPull ICMP Activity M2 (Outbound)"; content:"R"; startswith; content:"PROJECT_"; distance:1; within:9; fast_pattern; content:"total="; content:"current="; distance:0; reference:url,unit42.paloaltonetworks.com/pingpull-gallium/; reference:md5,b4dd22013aefae6f721f0b67be61dc91; classtype:trojan-activity; sid:2036972; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_06_13, deployment Perimeter, malware_family Gallium, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_06_13;)