ET MALWARE Kuluoz/Asprox CnC Response

Query · suricata

flow:from_server,established;
flowbits:isset,ET.Kuluoz;
content:"|0d 0a 0d 0a|";
content:"|0d 0a 80 00 00 00|"; distance:2; within:6;

Rule dependencies

⚠ Higher-order rule. It fires on other rules' alerts, not on raw events, so it cannot fire on its own. Deploy the rules it depends on too.

Depends on

Raw source ET MALWARE Kuluoz/Asprox CnC Response · 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 -> $HOME_NET any (
    msg:"ET MALWARE Kuluoz/Asprox CnC Response";
    flow:from_server,established;
    flowbits:isset,ET.Kuluoz;
    content:"|0d 0a 0d 0a|";
    content:"|0d 0a 80 00 00 00|"; distance:2; within:6;
    reference:md5,a3e0f51356d48124fba25485d1871b28;
    reference:url,www.trendmicro.com/cloud-content/us/pdfs/security-intelligence/white-papers/wp-asprox-reborn.pdf;
    reference:url,blog.fortinet.com/post/changes-in-the-asprox-botnet;
    classtype:command-and-control;
    sid:2019187; rev:5;
    metadata:created_at 2014_09_17, signature_severity Major, updated_at 2019_07_26;
)

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