ET HUNTING Possible Fake Edu Host with __test Cookie

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.host;
content:"edu";
pcre:"/(?!\.[a-z]{2}$|$)/R";
http.cookie;
content:"__test="; fast_pattern; depth:7;
Raw source ET HUNTING Possible Fake Edu Host with __test Cookie · 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 -> $EXTERNAL_NET any (
    msg:"ET HUNTING Possible Fake Edu Host with __test Cookie";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.host;
    content:"edu";
    pcre:"/(?!\.[a-z]{2}$|$)/R";
    http.cookie;
    content:"__test="; fast_pattern; depth:7;
    classtype:misc-activity;
    sid:2035555; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_03_21, deployment Perimeter, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_03_21, reviewed_at 2024_10_15;
)

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