ET WEB_CLIENT DRIVEBY EXE Embeded in Page Likely Evil M1

Query · suricata

flow:established,from_server;
file_data;
content:"vbscript"; nocase;
content:"|22|4D5A90"; fast_pattern; nocase;
content:!"|22|"; within:500;
pcre:"/^[a-f0-9]{500}/Rsi";
Raw source ET WEB_CLIENT DRIVEBY EXE Embeded in Page Likely Evil M1 · 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 DRIVEBY EXE Embeded in Page Likely Evil M1";
    flow:established,from_server;
    file_data;
    content:"vbscript"; nocase;
    content:"|22|4D5A90"; fast_pattern; nocase;
    content:!"|22|"; within:500;
    pcre:"/^[a-f0-9]{500}/Rsi";
    classtype:trojan-activity;
    sid:2020893; rev:2;
    metadata:affected_product Any, attack_target Client_Endpoint, created_at 2015_04_11, deployment Perimeter, confidence High, signature_severity Minor, tag DriveBy, updated_at 2019_07_26;
)

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