ET HUNTING Win32/BROOXML OOXML File Format Inbound

Query · suricata

flow:established,to_client;
flowbits:isset,ET.brooxml;
http.response_body;
content:"|50 4b 03 04|"; offset:4;
content:"|13 00|"; distance:22; within:2;
content:"[Content_Types].xml"; distance:2; within:19;
content:"word/document.xml"; fast_pattern;
target:dest_ip;

Rule dependencies

⚠ Higher-order rule. It fires on other rules' alerts, not on raw events, so it cannot fire on its own. Deploy the rules it depends on too.

Depends on

Raw source ET HUNTING Win32/BROOXML OOXML File Format Inbound · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http any any -> $HOME_NET any (
    msg:"ET HUNTING Win32/BROOXML OOXML File Format Inbound";
    flow:established,to_client;
    flowbits:isset,ET.brooxml;
    http.response_body;
    content:"|50 4b 03 04|"; offset:4;
    content:"|13 00|"; distance:22; within:2;
    content:"[Content_Types].xml"; distance:2; within:19;
    content:"word/document.xml"; fast_pattern;
    reference:md5,d3c1e1d6abf3a534dea2f6ff04fe153b;
    classtype:bad-unknown;
    sid:2057738; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2024_11_20, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_11_20;
    target:dest_ip;
)

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