alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING HTA Download with PowerShell User-Agent"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".hta"; endswith; http.user_agent; content:"WindowsPowerShell/"; fast_pattern; classtype:misc-activity; sid:2044624; rev:1; metadata:created_at 2023_03_15, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_15;)