alert http $HOME_NET any -> any any (msg:"ET INFO Outbound HTTP Request from Microsoft Office for .html"; flow:established,to_server; flowbits:set,ET.MSFT.GET.HTML; http.method; content:"GET"; http.uri; content:".html"; endswith; http.user_agent; content:"ms-office"; fast_pattern; classtype:misc-activity; sid:2054242; rev:1; metadata:attack_target Client_and_Server, created_at 2024_07_03, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_07_03; target:src_ip;)