alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Downloader.26001 Url Pattern Detected"; flow:established,to_server; content:"install.php?"; nocase; http_uri; content:"wall_id="; nocase; http_uri; content:"&maddr=0"; nocase; http_uri; content:"&action="; nocase; http_uri; classtype:trojan-activity; sid:2006400; rev:6; metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)