ET MALWARE Mermaid Ransomware Variant CnC Activity M1

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Mermaid Ransomware Variant CnC Activity M1";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"=ID:__";
    content:"___Key1|3a|___";
    content:"___Key2|3a|___"; fast_pattern;
    http.user_agent;
    content:"Mozilla/3.0 (compatible|3b 20|Indy Library)"; bsize:38;
    http.header_names;
    content:!"Referer";
    reference:md5,b3bc3fe63fad42ae8bcd448b8aec3e3e;
    classtype:command-and-control;
    sid:2029234; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_01_07, deployment Perimeter, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_01_24, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;
)