ET EXPLOIT LastPass RCE Attempt

Query · suricata

flow:established,to_client;
file.data;
content:"getboundingclientrect"; nocase;
content:"mouseevent"; fast_pattern;
content:"dispatchevent"; nocase;
pcre:"/^\s*\x28\s*new\s*MouseEvent\s*\x28\s*[\x22\x27]\s*click/Rsi";
content:"addeventlistener"; nocase;
pcre:"/^\s*\x28\s*[\x22\x27]\s*message/Rsi";
content:!"paymentsheet"; nocase;
Raw source ET EXPLOIT LastPass RCE Attempt · 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 EXPLOIT LastPass RCE Attempt";
    flow:established,to_client;
    file.data;
    content:"getboundingclientrect"; nocase;
    content:"mouseevent"; fast_pattern;
    content:"dispatchevent"; nocase;
    pcre:"/^\s*\x28\s*new\s*MouseEvent\s*\x28\s*[\x22\x27]\s*click/Rsi";
    content:"addeventlistener"; nocase;
    pcre:"/^\s*\x28\s*[\x22\x27]\s*message/Rsi";
    content:!"paymentsheet"; nocase;
    reference:url,project-zero.issues.chromium.org/issues/42452418;
    classtype:trojan-activity;
    sid:2022989; rev:4;
    metadata:affected_product Web_Browser_Plugins, attack_target Client_Endpoint, created_at 2016_07_28, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, updated_at 2025_04_09;
)

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