alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET INFO Download of Embedded OpenType (EOT) File flowbit set"; flow:established,to_client; file_data; content:"|4c 50|"; offset:34; depth:2; flowbits:set,ET.EOT.Download; flowbits:noalert; reference:url,www.w3.org/Submission/EOT/#FileFormat; classtype:misc-activity; sid:2024829; rev:2; metadata:affected_product Internet_Explorer, affected_product Mac_OSX, affected_product Microsoft_Edge_Browser, attack_target Client_Endpoint, created_at 2017_10_10, deployment Perimeter, performance_impact Low, confidence High, signature_severity Minor, updated_at 2019_07_26;)