ET HUNTING Base64 Encoded whoami in HTTP Server Response

Query · suricata

flow:established,to_client;
file.data;
content:"d2hvYW1p";
Raw source ET HUNTING Base64 Encoded whoami in HTTP Server Response · 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 HUNTING Base64 Encoded whoami in HTTP Server Response";
    flow:established,to_client;
    file.data;
    content:"d2hvYW1p";
    reference:md5,a6828081717974a89792548e1e31f29a;
    reference:url,twitter.com/fr0s7_/status/1428326979527381000;
    classtype:bad-unknown;
    sid:2033745; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_08_19, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_08_19;
)

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