alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DELETED CPL Trojan Downloader Request"; flow:established,to_server; content:".cpl?|20|HTTP/1.1"; nocase; content:!"Referer|3a 20|"; http_header; classtype:trojan-activity; sid:2012910; rev:6; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2011_06_01, deployment Perimeter, signature_severity Major, tag Trojan_Downloader, updated_at 2019_07_26;)