ET MALWARE NimPlant Sending Command (Inbound)

Query · suricata

flow:established,to_client;
flowbits:isset,ET.nimplant;
flowbits:unset,ET.nimplant;
http.stat_code;
content:"200";
file.data;
content:"|7b 22|id|22 3a 22|";
pcre:"/^(?:[a-zA-Z]{8})\x22\x2c\x22k\x22\x3a\x22/R";
content:"|22 2c 22|k|22 3a 22|"; fast_pattern;
target:dest_ip;

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 NimPlant Sending Command (Inbound) · Suricata
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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 NimPlant Sending Command (Inbound)";
    flow:established,to_client;
    flowbits:isset,ET.nimplant;
    flowbits:unset,ET.nimplant;
    http.stat_code;
    content:"200";
    file.data;
    content:"|7b 22|id|22 3a 22|";
    pcre:"/^(?:[a-zA-Z]{8})\x22\x2c\x22k\x22\x3a\x22/R";
    content:"|22 2c 22|k|22 3a 22|"; fast_pattern;
    reference:url,github.com/chvancooten/NimPlant;
    classtype:trojan-activity;
    sid:2044348; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_02_27, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_02_27;
    target:dest_ip;
)

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