alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING Terse Request for EXE from DigitalOcean Spaces"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".exe"; endswith; http.host; content:".digitaloceanspaces.com"; endswith; fast_pattern; http.header_names; content:!"|0d 0a|User-Agent|0d 0a|"; content:!"|0d 0a|Referer|0d 0a|"; content:!"|0d 0a|Accept"; classtype:bad-unknown; sid:2032359; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_04_01, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_04_01;)