ET MALWARE Octopus Malware CnC Activity

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:".php?query="; fast_pattern;
pcre:"/^\/[a-z]\.php\?query=[a-f0-9]{32}$/i";
http.request_body;
content:"eyJpZCI6";
http.accept;
content:"text/html,application/xhtml+xml,application/xml|3b|q=0.9,*/*|3b|q=0.8";
http.content_type;
content:"multipart/form-data|3b|";
http.protocol;
content:"HTTP/1.0";
Raw source ET MALWARE Octopus Malware CnC Activity · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Octopus Malware CnC Activity";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".php?query="; fast_pattern;
    pcre:"/^\/[a-z]\.php\?query=[a-f0-9]{32}$/i";
    http.request_body;
    content:"eyJpZCI6";
    http.accept;
    content:"text/html,application/xhtml+xml,application/xml|3b|q=0.9,*/*|3b|q=0.8";
    http.content_type;
    content:"multipart/form-data|3b|";
    http.protocol;
    content:"HTTP/1.0";
    reference:md5,1610cddb80d1be5d711feb46610f8a77;
    reference:md5,d8c8f2bf85796014feb06be41b99ca76;
    reference:url,securelist.com/octopus-infested-seas-of-central-asia/88200/;
    classtype:command-and-control;
    sid:2026544; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_10_24, deployment Perimeter, confidence High, signature_severity Major, tag Octopus, updated_at 2020_08_27;
)

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