alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Smurf2 CnC Checkin"; flow:established,to_server; http.method; content:"POST"; http.user_agent; content:"Mozilla/5.0"; http.request_body; content:"teststr="; depth:8; nocase; fast_pattern; content:"&testval="; nocase; distance:0; http.accept; content:"??"; reference:md5,e2d136bb63edc092d2f3d26885b239d9; classtype:command-and-control; sid:2025168; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_12_21, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_24;)