alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Doc Requesting Remote Template (.dot)"; flow:established,to_server; flowbits:set,ETPRO.Maldoc.dot; http.method; content:"GET"; http.uri; content:".dot"; endswith; fast_pattern; http.user_agent; content:"|3b 20|ms-office|3b 20|MSOffice|20|"; http.header_names; content:!"Referer"; classtype:bad-unknown; sid:2035038; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_02_02, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_02_02, reviewed_at 2023_08_25;)