alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Windows Powershell User-Agent Usage"; flow:established,to_server; http.user_agent; content:"Mozilla/"; startswith; content:") WindowsPowerShell/"; distance:0; fast_pattern; classtype:not-suspicious; sid:2033355; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_07_16, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_07_16;)