alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Parallax CnC Activity M17 (set)"; flow:established,to_server; content:"|46 6f fb 85|"; startswith; fast_pattern; content:"|86 b8 83|"; distance:1; within:3; flowbits:set,ET.Parallax-17; flowbits:noalert; reference:md5,65a0ec476aaefcf6aeb328ac1641ed29; classtype:command-and-control; sid:2035066; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_02_03, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_02_03;)