alert http1 $HOME_NET any -> $EXTERNAL_NET [443,7080,8080,80] (msg:"ET MALWARE W32/Emotet.v4 Checkin 2"; flow:established,to_server; urilen:1; http.method; content:"POST"; http.protocol; content:"HTTP/1."; http.user_agent; content:"|20|MSIE|20|"; fast_pattern; http.host; pcre:"/^(?:\d{1,3}\.){3}\d{1,3}(?:\x3a[03478]+)?/"; http.content_len; byte_test:0,>,150,0,string,dec; http.header_names; content:"|0d 0a|User-Agent|0d 0a|"; startswith; content:!"|0d 0a|Accept"; content:!"|0d 0a|Referer|0d 0a|"; content:!"|0d 0a|Content-Type|0d 0a|"; content:!"|0d 0a|Cookie|0d 0a|"; content:!"|0d 0a|TagId|0d 0a|"; http.request_body; pcre:"/^[\x20-\x7e\r\n]{0,20}[^\x20-\x7e\r\n]/s"; classtype:command-and-control; sid:2035048; rev:11; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_08_17, deployment Perimeter, deprecation_reason False_Positive, malware_family Emotet, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2024_04_04;)