alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE TA415 CnC Host Profile Exfiltration (POST)"; flow:established,to_server; http.method; content:"POST"; http.uri; pcre:"/^(?:\x2f20\d{2}\x2d\d{2}\x2d\d{2}\x2d\d{2}\x3a\d{2}\x3a\d{2}\x2b\d{4}\x5f)/"; http.content_type; content:"application/x-www-form-urlencoded"; http.user_agent; content:"python-urllib"; nocase; startswith; http.request_body; content:"PT09PT09PT09PT09PT09PT09PT09"; fast_pattern; base64_decode:bytes 300; base64_data; content:"please|20|log|20|into|20|https|3a 2f 2f|github|2e|com|2f|login|2f|device"; reference:md5,86a7d3b08826025ba74279e31ceb5cfb; classtype:trojan-activity; sid:2064403; 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_08_27, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Critical, tag c2, tag Description_Generated_By_Proofpoint_Nexus, tag TA415, updated_at 2025_09_08, former_sid 2864414, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol; target:src_ip;)