ET MALWARE Golang/Kaos/YamaBot CnC Activity M2 (POST)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:".php"; endswith;
http.user_agent;
content:"TW96"; startswith; fast_pattern;
pcre:"/^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/";
http.header_names;
content:!"Referer";
Raw source ET MALWARE Golang/Kaos/YamaBot CnC Activity M2 (POST) · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Golang/Kaos/YamaBot CnC Activity M2 (POST)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".php"; endswith;
    http.user_agent;
    content:"TW96"; startswith; fast_pattern;
    pcre:"/^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/";
    http.header_names;
    content:!"Referer";
    reference:md5,cf1a90e458966bcba8286d46d6ab052c;
    reference:md5,612538328e0c4f3e445fb58ef811336a;
    reference:md5,76125115415a80c4ec4c9b1a440f6054;
    reference:url,blogs.jpcert.or.jp/ja/2022/06/yamabot.html;
    classtype:trojan-activity;
    sid:2037252; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_07_01, deployment Perimeter, malware_family Lazarus, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_07_01;
)

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