alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Parallax CnC Response Activity M17"; flow:established,to_client; flowbits:isset,ET.Parallax-17; content:"|46 6f fb 85 |"; startswith; fast_pattern; content:"|86 b8 83|"; distance:1; within:3; reference:md5,65a0ec476aaefcf6aeb328ac1641ed29; classtype:command-and-control; sid:2035067; rev:2; 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 2024_03_14;)