ET MALWARE UNK NSFWBot CnC Command Inbound

Query · suricata

flow:established,to_client;
flowbits:isset,ET.UNK.NSFWBOT;
http.response_body;
content:"|7b 22|command|5f|id|22 3a 22|"; startswith; fast_pattern;
pcre:"/^\d{13}/R";
content:"|22 2c 22|type|22 3a 22|"; within:10;
content:"|22|params|22|"; distance:0;
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 UNK NSFWBot CnC 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 UNK NSFWBot CnC Command Inbound";
    flow:established,to_client;
    flowbits:isset,ET.UNK.NSFWBOT;
    http.response_body;
    content:"|7b 22|command|5f|id|22 3a 22|"; startswith; fast_pattern;
    pcre:"/^\d{13}/R";
    content:"|22 2c 22|type|22 3a 22|"; within:10;
    content:"|22|params|22|"; distance:0;
    classtype:command-and-control;
    sid:2061776; rev:1;
    metadata:attack_target Client_Endpoint, tls_state plaintext, created_at 2025_04_21, deployment Perimeter, confidence High, signature_severity Critical, tag c2, updated_at 2025_04_21, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
    target:dest_ip;
)

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