ET PHISHING TA397/Bitter CnC Fence Response

Query · suricata

flow:established,to_client;
http.stat_code;
content:"403";
http.response_body;
content:"|7b 22|error|22 3a 22|Access|20|Denied|22|"; startswith;
content:"|22|country|22|";
content:"|22|message|22 3a 22|Your|20|country|20|is|20|not|20|authorized|20|to|20|access|20|this|20|resource|22 7d|"; fast_pattern;
target:dest_ip;
Raw source ET PHISHING TA397/Bitter CnC Fence 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 PHISHING TA397/Bitter CnC Fence Response";
    flow:established,to_client;
    http.stat_code;
    content:"403";
    http.response_body;
    content:"|7b 22|error|22 3a 22|Access|20|Denied|22|"; startswith;
    content:"|22|country|22|";
    content:"|22|message|22 3a 22|Your|20|country|20|is|20|not|20|authorized|20|to|20|access|20|this|20|resource|22 7d|"; fast_pattern;
    reference:md5,ff50d8c4235934d883b0f24c779e97a1;
    classtype:trojan-activity;
    sid:2066348; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_12_16, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, tag TA397, updated_at 2025_12_16;
    target:dest_ip;
)

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