ET WEB_CLIENT Possible Microsoft Edge Remote Command Execution PoC (CVE-2018-8495)

Query · suricata

flow:established,to_client;
file_data;
content:"wshfile:";
content:"../../"; within:100;
content:"SyncAppvPublishingServer.vbs"; within:200; nocase; fast_pattern;
content:"window.onkeydown=e=>"; nocase; distance:0;
content:"window.onkeydown=z="; nocase; distance:0;
content:"click()"; nocase; distance:0;
Raw source ET WEB_CLIENT Possible Microsoft Edge Remote Command Execution PoC (CVE-2018-8495) · 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 WEB_CLIENT Possible Microsoft Edge Remote Command Execution PoC (CVE-2018-8495)";
    flow:established,to_client;
    file_data;
    content:"wshfile:";
    content:"../../"; within:100;
    content:"SyncAppvPublishingServer.vbs"; within:200; nocase; fast_pattern;
    content:"window.onkeydown=e=>"; nocase; distance:0;
    content:"window.onkeydown=z="; nocase; distance:0;
    content:"click()"; nocase; distance:0;
    reference:url,leucosite.com/Microsoft-Edge-RCE/;
    reference:cve,2018-8495;
    classtype:attempted-user;
    sid:2026488; rev:1;
    metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2018_10_15, cve CVE_2018_8495, deployment Perimeter, confidence Medium, signature_severity Major, updated_at 2019_07_26;
)

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