alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Probable OneLouder downloader (Zeus P2P)"; flow:established,to_server; flowbits:set,ET.OneLouderHeader; flowbits:noalert; urilen:1<>7; http.uri; pcre:"/\/\d+$/"; http.user_agent; content:"|20|MSIE|20|"; fast_pattern; http.header_names; to_lowercase; content:!"|0d 0a|accept-language|0d 0a|"; content:!"|0d 0a|referer|0d 0a|"; classtype:trojan-activity; sid:2018983; rev:12; metadata:created_at 2014_08_22, performance_impact Significant, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_29;)