ET MALWARE Unknown VBScript Loader with Encoded PowerShell Execution Inbound

Query · suricata

flow:established,from_server;
http.stat_code;
content:"200";
file.data;
content:"powershell"; nocase;
content:"-e"; within:40; nocase;
content:".Get|28 22|Win32_ProcessStartup|22 29|"; distance:0; nocase; fast_pattern;
content:"Process.Create|28|"; distance:0; nocase;
Raw source ET MALWARE Unknown VBScript Loader with Encoded PowerShell Execution Inbound · Suricata
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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 MALWARE Unknown VBScript Loader with Encoded PowerShell Execution Inbound";
    flow:established,from_server;
    http.stat_code;
    content:"200";
    file.data;
    content:"powershell"; nocase;
    content:"-e"; within:40; nocase;
    content:".Get|28 22|Win32_ProcessStartup|22 29|"; distance:0; nocase; fast_pattern;
    content:"Process.Create|28|"; distance:0; nocase;
    reference:md5,f17e15a9d28a85bd41d74233859d4df4;
    classtype:trojan-activity;
    sid:2027374; rev:4;
    metadata:created_at 2019_05_23, confidence Medium, signature_severity Major, tag Loader, updated_at 2020_11_18;
)

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