ET MALWARE Unknown Stealer Victim Desktop Screenshot Exfiltration (POST)

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Unknown Stealer Victim Desktop Screenshot Exfiltration (POST)";
    flow:established,to_server;
    urilen:7;
    http.method;
    content:"POST";
    http.uri;
    content:"/upload";
    http.request_body;
    content:"name|3d 22|file|22 3b 20|filename|3d 22|screenshot|5f|"; fast_pattern;
    pcre:"/^(?:\d{1,3}\x2e){3}\d{1,3}\x5f\d{8}\x5f/R";
    reference:md5,4d1de234e39d796efe5319a4903001ff;
    classtype:command-and-control;
    sid:2060951; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2025_03_18, deployment Perimeter, confidence High, signature_severity Critical, tag c2, updated_at 2025_03_18, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
)