alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Potential Fake AV Download (download/install.php)"; flow:established,to_server; http.method; content:"GET"; nocase; http.uri; content:"download/install.php"; fast_pattern; http.host; pcre:"/^[a-z\x2e]+(security|virus|pro|anti|scan|mypc|total|protect|check|guard|defend)/i"; reference:url,lists.emergingthreats.net/pipermail/emerging-sigs/2009-December/004891.html; reference:url,malwareurl.com; reference:url,www.malwaredomainlist.com; classtype:trojan-activity; sid:2010465; rev:6; metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_16;)