ET MALWARE MSIL/Matrix Ransomware CnC Activity

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE MSIL/Matrix Ransomware CnC Activity";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".php?apikey=";
    content:"&compuser="; distance:0;
    content:"&sid="; distance:0;
    content:"&phase="; distance:0;
    http.user_agent;
    content:"Mozilla/4.0 (compatible|3b 20|Synapse)"; fast_pattern; bsize:33;
    http.header_names;
    content:!"Referer|0d 0a|";
    reference:md5,ad8a7a383971ce0f5fc51e909e406996;
    classtype:command-and-control;
    sid:2024120; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_02_24, deployment Perimeter, malware_family Ransomware, malware_family Matrix, confidence High, signature_severity Major, tag Ransomware, updated_at 2020_08_04, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;
)