alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Aurora/OneKeyLocker Ransomware CnC Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?generate="; fast_pattern; content:"/-"; distance:0; content:"&hwid="; distance:0; http.header_names; content:!"Referer"; reference:md5,31d65e315115c823f619a381576984f8; classtype:command-and-control; sid:2025586; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_05_30, deployment Perimeter, malware_family Aurora, malware_family OneKeyLocker, 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;)