ET SCAN Mirai Variant User-Agent (Inbound)

Query · suricata

flow:established,to_server;
http.user_agent;
pcre:"/^Hello, World(?:(?:\/|\s)[0-9]\.0)?$/i";
content:"Hello, World"; nocase; fast_pattern; startswith;
Raw source ET SCAN Mirai Variant User-Agent (Inbound) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> any any (
    msg:"ET SCAN Mirai Variant User-Agent (Inbound)";
    flow:established,to_server;
    http.user_agent;
    pcre:"/^Hello, World(?:(?:\/|\s)[0-9]\.0)?$/i";
    content:"Hello, World"; nocase; fast_pattern; startswith;
    classtype:attempted-admin;
    sid:2029022; rev:3;
    metadata:affected_product Linux, attack_target IoT, created_at 2019_11_21, deployment Perimeter, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_29;
)

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