alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Request for EXE via Powershell"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".exe"; endswith; nocase; http.user_agent; content:"WindowsPowerShell/"; fast_pattern; reference:md5,38135f6de7042fa63df183671b09a5ee; classtype:misc-activity; sid:2043337; rev:2; metadata:attack_target Client_and_Server, created_at 2023_01_19, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_04_20;)