ET RETIRED Nerbian RAT CnC Checkin

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/pub/health_check.php"; fast_pattern; bsize:21;
http.user_agent;
content:"Go-http-client/1.1"; bsize:18;
http.header_names;
content:"|0d 0a|Host|0d 0a|User-Agent|0d 0a|Accept-Encoding|0d 0a 0d 0a|"; bsize:39;
Raw source ET RETIRED Nerbian RAT CnC Checkin · 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 Nerbian RAT CnC Checkin";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/pub/health_check.php"; fast_pattern; bsize:21;
    http.user_agent;
    content:"Go-http-client/1.1"; bsize:18;
    http.header_names;
    content:"|0d 0a|Host|0d 0a|User-Agent|0d 0a|Accept-Encoding|0d 0a 0d 0a|"; bsize:39;
    reference:md5,9cca59eec5af63e42cd845b67cf6df89;
    reference:md5,5d5bc970f975341558b8d2c225ca0115;
    reference:url,twitter.com/pr0xylife/status/1519704793593307136;
    classtype:trojan-activity;
    sid:2036426; rev:3;
    metadata:attack_target Client_Endpoint, created_at 2022_04_29, deployment Perimeter, deployment SSLDecrypt, former_category MALWARE, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_12, reviewed_at 2024_09_12;
)

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