ET WEB_CLIENT PowerShell call in script 2

Query · suricata

flow:from_server,established;
file_data;
content:"vbscript"; nocase;
content:"shell"; nocase;
pcre:"/^\W/Rs";
content:"powershell.exe"; fast_pattern;
content:"<script";
pcre:"/^((?!<\/script>).)+?powershell\.exe/Rsi";
Raw source ET WEB_CLIENT PowerShell call in script 2 · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET WEB_CLIENT PowerShell call in script 2";
    flow:from_server,established;
    file_data;
    content:"vbscript"; nocase;
    content:"shell"; nocase;
    pcre:"/^\W/Rs";
    content:"powershell.exe"; fast_pattern;
    content:"<script";
    pcre:"/^((?!<\/script>).)+?powershell\.exe/Rsi";
    classtype:attempted-user;
    sid:2025062; 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;
)

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