ET MALWARE MedusaHTTP Variant CnC Checkin M2

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:".jsp"; endswith;
http.request_body;
content:"Webcookie="; startswith;
pcre:"/^[a-z0-9/%=]{100,}$/Rsi";
http.header_names;
content:!"Referer";
Raw source ET MALWARE MedusaHTTP Variant CnC Checkin M2 · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE MedusaHTTP Variant CnC Checkin M2";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".jsp"; endswith;
    http.request_body;
    content:"Webcookie="; startswith;
    pcre:"/^[a-z0-9/%=]{100,}$/Rsi";
    http.header_names;
    content:!"Referer";
    reference:md5,c2262e46153ac59a72bcb96a35c262da;
    classtype:command-and-control;
    sid:2029097; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_12_05, deployment Perimeter, malware_family MedusaHTTP, confidence High, signature_severity Major, updated_at 2019_12_05;
)

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