ET INFO Possible Sharepoint Resource Infection

Query · suricata

flow:established,to_client;
http.response_line;
content:"HTTP/1.1|20|409|20|CONFLICT";
http.header;
content:"|0d 0a|x-virus-infected|3a 20|";
content:"-location|3a 20|"; distance:0;
Raw source ET INFO Possible Sharepoint Resource Infection · 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 INFO Possible Sharepoint Resource Infection";
    flow:established,to_client;
    http.response_line;
    content:"HTTP/1.1|20|409|20|CONFLICT";
    http.header;
    content:"|0d 0a|x-virus-infected|3a 20|";
    content:"-location|3a 20|"; distance:0;
    reference:url,docs.microsoft.com/en-us/openspecs/sharepoint_protocols/ms-wsshp/ba4ee7a8-704c-4e9c-ab14-fa44c574bdf4;
    classtype:bad-unknown;
    sid:2033698; rev:1;
    metadata:attack_target Client_and_Server, created_at 2021_08_10, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_08_10;
)

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