alert http1 $HOME_NET any -> $EXTERNAL_NET [443,7080,8080,80] (msg:"ET MALWARE W32/Emotet.v4 Checkin"; flow:established,to_server; http.host; pcre:"/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/"; http.user_agent; content:"|20|MSIE|20|"; http.request_body; pcre:"/^[\x20-\x7e\r\n]{0,20}[^\x20-\x7e\r\n]/s"; http.start; content:"POST / HTTP/1.1|0d 0a|User-Agent|3a 20|"; startswith; fast_pattern; http.header_names; content:!"|0d 0a|Accept"; content:!"|0d 0a|Referer|0d 0a|"; content:!"Content-Type"; content:!"Cookie"; content:!"TagId"; classtype:command-and-control; sid:2035047; rev:10; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_07_24, deployment Perimeter, malware_family Emotet, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2024_04_14;)