ET MALWARE Higaisa CnC Activity

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".php"; endswith;
http.user_agent;
content:"Mozilla/5.0 (Windows NT 6.1|3b 20|WOW64|3b 20|rv|3a|13.0) Gecko/2010010"; depth:58; fast_pattern;
pcre:"/^[A-F0-9]{8}$/Rsi";
http.header_names;
content:!"Accept";
content:!"Referer";
content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|";
Raw source ET MALWARE Higaisa 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Higaisa CnC Activity";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".php"; endswith;
    http.user_agent;
    content:"Mozilla/5.0 (Windows NT 6.1|3b 20|WOW64|3b 20|rv|3a|13.0) Gecko/2010010"; depth:58; fast_pattern;
    pcre:"/^[A-F0-9]{8}$/Rsi";
    http.header_names;
    content:!"Accept";
    content:!"Referer";
    content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|";
    reference:md5,23a30f6afa17f971148d9e955f65ae98;
    classtype:command-and-control;
    sid:2029640; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_03_17, deployment Perimeter, malware_family Higasa, confidence High, signature_severity Major, updated_at 2020_03_17;
)

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