ET MALWARE NamelessC2 Implant Terminal Checkin

Query · suricata

flow:established,to_server;
urilen:5;
http.method;
content:"GET";
http.uri;
content:"/info";
http.header_names; bsize:18;
content:"|0d 0a|accept|0d 0a|host|0d 0a 0d 0a|"; fast_pattern;
http.accept; bsize:3;
content:"|2a 2f 2a|";
Raw source ET MALWARE NamelessC2 Implant Terminal Checkin · 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 MALWARE NamelessC2 Implant Terminal Checkin";
    flow:established,to_server;
    urilen:5;
    http.method;
    content:"GET";
    http.uri;
    content:"/info";
    http.header_names; bsize:18;
    content:"|0d 0a|accept|0d 0a|host|0d 0a 0d 0a|"; fast_pattern;
    http.accept; bsize:3;
    content:"|2a 2f 2a|";
    reference:url,github.com/trickster0/NamelessC2;
    classtype:command-and-control;
    sid:2056414; rev:1;
    metadata:attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_10_02, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Critical, updated_at 2024_10_02;
)

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