ET MALWARE MSIL/n2019cov (COVID-19) Ransomware CnC Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE MSIL/n2019cov (COVID-19) Ransomware CnC Checkin";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".php"; endswith;
    http.request_body;
    content:"usuario="; startswith;
    content:"|20|-|20|"; distance:0;
    content:"|20|-|20|"; distance:0;
    content:"&llave1="; distance:0;
    content:"&llave2="; distance:0; fast_pattern;
    http.header_names;
    content:!"Referer";
    content:!"User-Agent";
    reference:md5,f02e5ae5b997e447a43ace281bc2bae9;
    classtype:command-and-control;
    sid:2029736; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_03_25, deployment Perimeter, deployment SSLDecrypt, malware_family MSIL_n2019cov, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_10, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;
)