alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/AutoIt.NU Miner Dropper CnC Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/?id="; depth:5; content:"&pt="; within:20; fast_pattern; http.user_agent; pcre:"/^[a-f0-9]{32}$/i"; http.request_body; pcre:"/^(?:[A-Z0-9+/]{4})*(?:[A-Z0-9+/]{2}==|[A-Z0-9+/]{3}=|[A-Z0-9+/]{4})$/i"; http.content_type; content:"application/x-www-form-urlencoded"; http.header_names; content:"Accept"; content:!"Accept-"; content:!"Cache"; content:!"Referer"; reference:md5,cd7a49513771efd9d4de873956ef8af5; classtype:command-and-control; sid:2025598; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_06_21, deployment Perimeter, malware_family Autoit_NU, performance_impact Low, confidence High, signature_severity Major, tag Dropper, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_18;)