ET MALWARE Observed NimPlant Server Response (Inbound)

Query · suricata

flow:established,to_client;
http.header;
content:"|0d 0a|Server|3a 20|NimPlant C2 Server|0d 0a|"; nocase; fast_pattern;
target:dest_ip;
Raw source ET MALWARE Observed NimPlant Server Response (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 Observed NimPlant Server Response (Inbound)";
    flow:established,to_client;
    http.header;
    content:"|0d 0a|Server|3a 20|NimPlant C2 Server|0d 0a|"; nocase; fast_pattern;
    reference:url,github.com/chvancooten/NimPlant;
    classtype:trojan-activity;
    sid:2044340; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_02_24, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_02_24;
    target:dest_ip;
)

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