ET MALWARE ELF/MooBot Mirai DDoS Variant Server Keep Alive

Query · suricata

flow:established,to_client;
dsize:4;
content:"|13 11 18 19|";
threshold:type threshold, count 4, seconds 40, track by_src;
Raw source ET MALWARE ELF/MooBot Mirai DDoS Variant Server Keep Alive · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $EXTERNAL_NET ![443,80] -> $HOME_NET any (
    msg:"ET MALWARE ELF/MooBot Mirai DDoS Variant Server Keep Alive";
    flow:established,to_client;
    dsize:4;
    content:"|13 11 18 19|";
    threshold:type threshold, count 4, seconds 40, track by_src;
    reference:md5,b3be367b4868d39d6978d27f4d4dfaaf;
    reference:url,www.fortinet.com/blog/threat-research/mirai-based-botnet-moobot-targets-hikvision-vulnerability;
    reference:url,blog.netlab.360.com/ddos-botnet-moobot-en/;
    classtype:command-and-control;
    sid:2034639; rev:2;
    metadata:affected_product Linux, attack_target Client_Endpoint, created_at 2021_12_09, deployment Perimeter, malware_family ELF_MooBot, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_12_09;
)

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