alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DELETED Nemucod Downloader Oct 04"; flow:established,to_server; content:"/log.php?f="; http_uri; depth:11; fast_pattern; pcre:"/^\/log\.php\?f=[0-1](?:\.[a-z]+)?$/U"; content:"User-Agent|3a 20|Mozilla/4.0 (compatible|3b| MSIE 7.0|3b|"; http_header; content:!"Referer|3a|"; content:!"Cookie|3a 20|"; classtype:trojan-activity; sid:2023318; rev:3; metadata:created_at 2016_10_05, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)