alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Aura Ransomware CnC Activity"; flow:established,to_server; http.method; content:"POST"; http.user_agent; content:"{KIARA}"; fast_pattern; http.request_body; content:"id="; depth:3; content:"&guid="; http.header_names; content:!"Referer"; reference:md5,dde4654f1aa9975d1ffea1af8ea5015f; classtype:command-and-control; sid:2026099; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_09_06, deployment Perimeter, malware_family Aura, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_25, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)