alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MICROPSIA Screenshot Upload M2"; flow:established,to_server; http.method; content:"POST"; http.uri; content:!"."; content:!"&"; http.request_body; content:"Content-Disposition|3a 20|form-data|3b 20|name=|22|jpxnk|22 3b 20|filename="; fast_pattern; content:"|22 0d 0a|Content-Type|3a 20|utf-8|0d 0a 0d 0a ff d8 ff e0|"; content:"JFIF"; within:40; http.header_names; content:!"Referer"; reference:md5,7833c0f413c1611f7281ac303bcef4b3; classtype:command-and-control; sid:2032822; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_04_23, deployment Perimeter, malware_family MICROPSIA, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_04_23;)