alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Parallax CnC Response Activity M6"; flow:established,to_client; content:"|eb 7d df 9f|"; depth:4; fast_pattern; content:"|32 c3 8a|"; distance:1; within:3; flowbits:isset,ET.Parallax-6; reference:md5,7babfff27d7aee0ceec438080e034fa0; classtype:command-and-control; sid:2029353; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_02_05, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_02_05;)