alert http $HOME_NET any -> $EXTERNAL_NET [443,7080,8080,80] (msg:"ET MALWARE W32/Emotet.v4 Checkin 3"; flow:established,to_server; content:"|20|MSIE|20|"; http_user_agent; pcre:"/^(?:\d{1,3}\.){3}\d{1,3}/W"; pcre:"/^[\x20-\x7e\r\n]{0,20}[^\x20-\x7e\r\n]/Ps"; http_request_line; content:"POST / HTTP/1."; depth:14; fast_pattern; http_header_names; content:"|0d 0a|User-Agent|0d 0a|"; depth:14; content:!"Accept"; content:!"Referer"; content:!"Content-Type"; content:!"Cookie"; content:!"TagId"; http_content_len; byte_test:0,<=,999,0,string,dec; byte_test:0,>,99,0,string,dec; classtype:command-and-control; sid:2035050; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_09_19, deployment Perimeter, deprecation_reason False_Positive, malware_family Emotet, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)