alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE DiamondFox HTTP Post CnC Checkin M3"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/gate.php"; endswith; fast_pattern; http.content_type; content:"application/x-www-form-urlencoded"; http.request_body; content:"="; offset:3; depth:1; content:"&q="; distance:0; content:"&proc="; distance:0; content:"&soft="; distance:0; content:"&rt="; distance:0; content:"&er="; distance:0; isdataat:!2,relative; http.header_names; content:!"Referer"; reference:url,twitter.com/ViriBack/status/1203337492386082816; reference:md5,17a1f7e98731df9b74b98accb650d50e; classtype:command-and-control; sid:2029144; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_12_12, deployment Perimeter, malware_family DiamondFox, performance_impact Moderate, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_12_18;)