alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Possible FakeAV Binary Download (Security)"; flow:established,to_client; http.header; content:"filename=|22|"; nocase; content:"security"; fast_pattern; nocase; within:50; content:!"ALLOW-FROM www.onecallnow.com"; pcre:"/filename\x3D\x22[^\r\n]*security[^\n]+\.exe/i"; http.content_type; content:!"text/xml"; depth:8; classtype:trojan-activity; sid:2012981; rev:7; metadata:created_at 2011_06_09, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_06;)