ET MALWARE Win32/Snatch Ransomware - Encryption Started

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Snatch Ransomware - Encryption Started";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.user_agent;
    content:"Go-http-client/"; startswith;
    http.request_body;
    content:"{|22|host|22 3a 22|"; startswith;
    content:"|22 2c 22|type|22 3a 22|started|22 2c 22|username|22 3a 22|"; distance:0; fast_pattern;
    content:"|22|}"; endswith;
    http.header_names;
    content:!"Referer";
    reference:md5,46406680a5825b6d1622acb984d4a41d;
    classtype:command-and-control;
    sid:2029103; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_12_10, deployment Perimeter, malware_family Snatch, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_12_10, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;
)