alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Aura Stealer Victim Checkin (GET)"; flow:established,to_server; flowbits:set,ET.AuraStealer; http.method; content:"GET"; http.uri; bsize:9; content:"/api/live"; fast_pattern; http.user_agent; to_lowercase; content:!"python"; content:!"curl"; http.header_names; strip_pseudo_headers; to_lowercase; content:!"|0d 0a|x-"; content:!"|0d 0a|referer|0d 0a|"; threshold:type limit,count 1,seconds 300,track by_src; reference:md5,45c7e81edfdc705bce7cb688d333fbf1; reference:url,community.emergingthreats.net/t/aura-stealer/3108/3; classtype:command-and-control; sid:2065860; 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_11_20, deployment Perimeter, deployment SSLDecrypt, malware_family AuraStealer, confidence Medium, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_11_20, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol; target:src_ip;)