ET MALWARE MedusaHTTP Variant CnC Checkin

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:".jsp"; endswith;
http.user_agent;
content:"Mozilla/5.0 (X11|3b 20|Ubuntu|3b 20|Linux i686|3b 20|rv|3a|45.0) Gecko/20100101 Firefox/45.0"; fast_pattern; endswith;
http.request_body;
content:"abc="; depth:4;
pcre:"/^[a-z0-9/%=]{100,}$/Ri";
Raw source ET MALWARE MedusaHTTP Variant 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE MedusaHTTP Variant CnC Checkin";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".jsp"; endswith;
    http.user_agent;
    content:"Mozilla/5.0 (X11|3b 20|Ubuntu|3b 20|Linux i686|3b 20|rv|3a|45.0) Gecko/20100101 Firefox/45.0"; fast_pattern; endswith;
    http.request_body;
    content:"abc="; depth:4;
    pcre:"/^[a-z0-9/%=]{100,}$/Ri";
    reference:url,www.arbornetworks.com/blog/asert/medusahttp-ddos-slithers-back-spotlight;
    classtype:command-and-control;
    sid:2027861; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_08_13, deployment Perimeter, malware_family MedusaHTTP, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2020_09_17;
)

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