ET RETIRED Possible Bot CnC Checkin (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"?register=V2luZG93"; fast_pattern;
http.header_names;
content:!"Referer|0d 0a|";
Raw source ET RETIRED Possible Bot CnC Checkin (GET) · Suricata
Esc
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 RETIRED Possible Bot CnC Checkin (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"?register=V2luZG93"; fast_pattern;
    http.header_names;
    content:!"Referer|0d 0a|";
    reference:md5,d4fdd80e3f4b1ef0e6c3904d91e5d319;
    classtype:bad-unknown;
    sid:2036381; rev:3;
    metadata:attack_target Client_Endpoint, created_at 2022_04_26, deployment Perimeter, former_category HUNTING, performance_impact Low, confidence Medium, signature_severity Major, updated_at 2024_09_12, reviewed_at 2024_09_12;
)

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