alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Neverquest/Vawtrak Posting Data"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/viewforum.php?f="; fast_pattern; pcre:"/\/viewforum\.php\?f=\d+&sid=[A-F0-9]{32}$/"; http.content_type; content:"application/octet-stream"; startswith; http.header_names; content:!"Referer|0d 0a|"; reference:md5,0400671fd3804fbf3fd1d6cf707bced4; reference:md5,1dfaeb7b985d2ba039cd158f63b8ae54; classtype:trojan-activity; sid:2018543; rev:5; metadata:created_at 2014_06_07, signature_severity Major, updated_at 2020_10_09;)