alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"GPL INFO Windows Media Video download"; flow:established,to_client; http.content_type; content:"video/x-ms-asf"; startswith; nocase; classtype:policy-violation; sid:2101438; rev:16; metadata:created_at 2010_09_23, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_03;)