ET MALWARE Locky CnC Checkin

Query · suricata

flow:to_server,established;
urilen:14;
http.method;
content:"POST";
http.uri;
content:"/imageload.cgi"; fast_pattern;
http.header;
content:"x-requested-with|3a 20|XMLHttpRequest|0d 0a|";
content:"www-form-urlencoded|0d 0a|";
http.request_body;
pcre:"/^[A-Za-z]{1,10}=[^&]+(?:&[A-Za-z]{1,10}=[^&]+){10,}$/s";
Raw source ET MALWARE Locky 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Locky CnC Checkin";
    flow:to_server,established;
    urilen:14;
    http.method;
    content:"POST";
    http.uri;
    content:"/imageload.cgi"; fast_pattern;
    http.header;
    content:"x-requested-with|3a 20|XMLHttpRequest|0d 0a|";
    content:"www-form-urlencoded|0d 0a|";
    http.request_body;
    pcre:"/^[A-Za-z]{1,10}=[^&]+(?:&[A-Za-z]{1,10}=[^&]+){10,}$/s";
    reference:md5,40ebefdec6870263827ce6425702e785;
    classtype:command-and-control;
    sid:2026517; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_10_17, deployment Perimeter, confidence High, signature_severity Major, tag Locky, updated_at 2020_11_04;
)

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