ET HUNTING Possible Telegram Proxy Site (sendDocument)

Query · suricata

flow:established,to_server;
http.uri;
content:"/sendDocument?chat_id="; fast_pattern;
http.host;
content:!"api.telegram.org";
Raw source ET HUNTING Possible Telegram Proxy Site (sendDocument) · 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 $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET HUNTING Possible Telegram Proxy Site (sendDocument)";
    flow:established,to_server;
    http.uri;
    content:"/sendDocument?chat_id="; fast_pattern;
    http.host;
    content:!"api.telegram.org";
    reference:url,core.telegram.org/bots/api#senddocument;
    reference:md5,3402c9373726396598011ef6ec1ea243;
    classtype:unknown;
    sid:2044621; rev:1;
    metadata:created_at 2023_03_14, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_15;
)

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