ET MALWARE Suspected Golang/Zerobot Websocket Activity (GET)

Query · suricata

flow:established,to_server;
http.request_line;
content:"GET /handle HTTP/1.1"; fast_pattern;
http.user_agent;
content:"Go-http-client/1.1"; bsize:18;
http.header;
content:"Upgrade|3a 20|websocket|0d 0a|"; endswith;
target:src_ip;
Raw source ET MALWARE Suspected Golang/Zerobot Websocket Activity (GET) · 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 Suspected Golang/Zerobot Websocket Activity (GET)";
    flow:established,to_server;
    http.request_line;
    content:"GET /handle HTTP/1.1"; fast_pattern;
    http.user_agent;
    content:"Go-http-client/1.1"; bsize:18;
    http.header;
    content:"Upgrade|3a 20|websocket|0d 0a|"; endswith;
    reference:url,www.fortinet.com/blog/threat-research/zerobot-new-go-based-botnet-campaign-targets-multiple-vulnerabilities;
    reference:md5,62c11ea75e82611b6ba7d7bf08ed009f;
    classtype:trojan-activity;
    sid:2042943; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_12_15, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_12_15;
    target:src_ip;
)

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