alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Spora Ransomware Checkin"; flow:to_server,established; http.method; content:"POST"; http.request_body; content:"=XDATABASE64ENCRYPTED"; fast_pattern; http.header_names; content:!"Cookie|0d 0a|"; content:!"Referer|0d 0a|"; classtype:command-and-control; sid:2024041; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_03_09, deployment Perimeter, malware_family Spora, confidence High, signature_severity Major, tag Ransomware, updated_at 2020_11_04, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)