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;)