ET MALWARE Zebrocy Backdoor CnC Activity

Query · suricata

flow:to_server,established;
http.method;
content:"POST";
http.uri;
content:".php?";
http.user_agent;
content:"Mozilla v5.1 (Windows NT 6.1|3b 20|rv|3a|6.0.1) Gecko/20100101 Firefox/6.0.1"; fast_pattern;
http.host;
pcre:"/^(?:\d{1,3}\.)\d{1,3}$/";
http.request_body;
content:"%0D%0AHost%20Name|3a|";
Raw source ET MALWARE Zebrocy Backdoor 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Zebrocy Backdoor CnC Activity";
    flow:to_server,established;
    http.method;
    content:"POST";
    http.uri;
    content:".php?";
    http.user_agent;
    content:"Mozilla v5.1 (Windows NT 6.1|3b 20|rv|3a|6.0.1) Gecko/20100101 Firefox/6.0.1"; fast_pattern;
    http.host;
    pcre:"/^(?:\d{1,3}\.)\d{1,3}$/";
    http.request_body;
    content:"%0D%0AHost%20Name|3a|";
    reference:md5,961e79a33f432ea96d2c8bf9eb010006;
    classtype:command-and-control;
    sid:2026527; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_10_19, deployment Perimeter, confidence High, signature_severity Major, tag Zebrocy, updated_at 2020_08_26;
)

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