alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Parallax CnC Activity M9 (set)"; flow:established,to_server; content:"|a5 20 94 f5|"; depth:4; fast_pattern; content:"|6d 54 21|"; distance:1; within:3; flowbits:set,ET.Parallax-9; flowbits:noalert; reference:md5,1b3f8c92d5d1ace34fa4dc2dd80c3eb7; classtype:command-and-control; sid:2030027; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_04_25, deployment Perimeter, malware_family Parallax, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_25;)