alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Tor Based Locker Page (Torrentlocker)"; flow:established,to_server; http.uri; content:"/buy.php?"; fast_pattern; http.header; pcre:"/Host\x3a\x20[a-z0-9]{16}\.[^\r\n]*?(?:tor|onion)/mi"; http.header_names; content:!"Referer|0d 0a|"; classtype:trojan-activity; sid:2018951; rev:6; metadata:created_at 2014_08_18, signature_severity Major, updated_at 2020_09_29;)