ET MALWARE Matanbuchus Loader CnC M1

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Matanbuchus Loader CnC M1";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".php"; endswith;
    http.content_type;
    content:"application/x-www-form-urlencoded";
    http.request_body;
    content:"=eyIzQ0VrIjoi"; fast_pattern;
    pcre:"/(?:IiwiM2ZlMTEiOi|IsIjNmZTExIjoi|iLCIzZmUxMSI6I)/R";
    reference:url,twitter.com/fr0s7_/status/1458823504925798408;
    classtype:command-and-control;
    sid:2034466; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_11_16, deployment Perimeter, malware_family Matanbuchus, confidence High, signature_severity Major, updated_at 2021_11_16, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)