ET MALWARE Win32/Braincrypt Ransomware CnC Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Braincrypt Ransomware CnC Checkin";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".php?uuid="; fast_pattern;
    pcre:"/\.php\?uuid=[a-z0-9]{32}$/i";
    http.user_agent;
    content:"Go-http-client/"; startswith;
    http.header_names;
    content:!"Accept|0d 0a|";
    content:!"Referer|0d 0a|";
    reference:md5,6b938ca31a55e743112ab34dc540a076;
    classtype:command-and-control;
    sid:2023675; rev:4;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_12_20, deployment Perimeter, malware_family Ransomware, malware_family Braincrypt, signature_severity Major, tag Ransomware, updated_at 2020_10_07, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;
)