ET HUNTING ARM Binary Downloaded via WGET Containing Suspicious Netcat Command - Possible IoT Malware

Query · suricata

flow:from_server,established;
flowbits:isset,ET.armwget;
content:"|25|24|25|28nc+";
content:"+-e+|25|2Fbin|25|2Fsh|25|29"; within:50; fast_pattern;

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 HUNTING ARM Binary Downloaded via WGET Containing Suspicious Netcat Command - Possible IoT Malware · 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 HUNTING ARM Binary Downloaded via WGET Containing Suspicious Netcat Command - Possible IoT Malware";
    flow:from_server,established;
    flowbits:isset,ET.armwget;
    content:"|25|24|25|28nc+";
    content:"+-e+|25|2Fbin|25|2Fsh|25|29"; within:50; fast_pattern;
    reference:url,blog.netlab.360.com/a-new-threat-an-iot-botnet-scanning-internet-on-port-81-en/;
    classtype:trojan-activity;
    sid:2024241; rev:2;
    metadata:attack_target IoT, created_at 2017_04_25, deployment Perimeter, confidence Medium, signature_severity Major, updated_at 2019_07_26;
)

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