alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Suspicious invoice.scr Download Request"; flow:established,to_server; content:"GET"; http_method; content:"|2F|invoice.scr"; nocase; http_uri; pcre:"/\x2Finvoice\x2Escr$/Ui"; classtype:trojan-activity; sid:2011995; rev:4; metadata:created_at 2010_12_02, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)