ET MALWARE AHK/BKDR_HTV.ZKGD-A CnC Checkin

Query · suricata

flow:established,to_server;
threshold:type limit, count 1, seconds 30, track by_src;
http.method;
content:"POST";
http.uri;
content:".php"; endswith;
http.request_body;
content:"&string="; depth:8; fast_pattern;
pcre:"/^[A-F0-9]+$/R";
http.content_type;
content:"|20|Charset=UTF-8"; endswith;
http.header_names;
content:!"Referer";
Raw source ET MALWARE AHK/BKDR_HTV.ZKGD-A 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE AHK/BKDR_HTV.ZKGD-A CnC Checkin";
    flow:established,to_server;
    threshold:type limit, count 1, seconds 30, track by_src;
    http.method;
    content:"POST";
    http.uri;
    content:".php"; endswith;
    http.request_body;
    content:"&string="; depth:8; fast_pattern;
    pcre:"/^[A-F0-9]+$/R";
    http.content_type;
    content:"|20|Charset=UTF-8"; endswith;
    http.header_names;
    content:!"Referer";
    reference:url,blog.trendmicro.co.jp/archives/19054;
    classtype:command-and-control;
    sid:2027155; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_04_04, deployment Perimeter, malware_family BKDR_HTV_ZKGD_A, performance_impact Low, confidence High, signature_severity Major, updated_at 2020_09_17;
)

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