alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT PowerShell call in script 1"; flow:from_server,established; file_data; content:"vbscript"; nocase; content:".run"; nocase; content:"powershell.exe"; fast_pattern; content:"<script"; pcre:"/^((?!<\/script>).)+?powershell\.exe/Rsi"; classtype:attempted-user; sid:2025061; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_11_27, deployment Perimeter, performance_impact Low, signature_severity Major, tag Web_Client_Attacks, updated_at 2020_08_19;)