ET MALWARE ELF/Emptiness v1 DNS Flood Command Inbound

Query · suricata

flow:established,from_server;
content:".dns|20|"; depth:5; fast_pattern;
pcre:"/^((\d{1,3}\.){3}\d{1,3}|((?:https?\x3a\/\/)?[a-z0-9\-]{1,30}\.){1,8}[a-z]{1,8})/Ri";
Raw source ET MALWARE ELF/Emptiness v1 DNS Flood Command Inbound · 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 any -> $HOME_NET any (
    msg:"ET MALWARE ELF/Emptiness v1 DNS Flood Command Inbound";
    flow:established,from_server;
    content:".dns|20|"; depth:5; fast_pattern;
    pcre:"/^((\d{1,3}\.){3}\d{1,3}|((?:https?\x3a\/\/)?[a-z0-9\-]{1,30}\.){1,8}[a-z]{1,8})/Ri";
    reference:url,blog.netlab.360.com/emptiness-a-new-evolving-botnet/;
    classtype:trojan-activity;
    sid:2027838; rev:1;
    metadata:affected_product Linux, created_at 2019_08_09, malware_family Emptiness, confidence High, signature_severity Major, tag DDoS, updated_at 2019_08_09;
)

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