alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE ApolloLocker Ransomware CnC Checkin 2"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; http.request_body; content:"id="; depth:3; content:"&crypto=ApolloCrypto"; fast_pattern; http.header_names; content:!"Referer|0d 0a|"; reference:md5,8acaa375c2146224d628bb408c3902ff; classtype:command-and-control; sid:2024667; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_09_06, deployment Perimeter, malware_family ApolloLocker, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_12, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)