ET MALWARE Unicorn Stealer Activity (POST)

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Unicorn Stealer Activity (POST)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".php"; endswith;
    http.request_body;
    content:"Content-Disposition|3a 20|form-data|3b 20|name=|22|file|22 3b 20|filename=";
    content:"form-data|3b 20|name=|22|filename|22 0d 0a|";
    content:"form-data|3b 20|name=|22|submit|22 0d 0a|";
    content:"form-data|3b 20|name=|22|id|22 0d 0a|";
    content:"form-data|3b 20|name=|22|src|22 0d 0a|"; fast_pattern;
    content:"form-data|3b 20|name=|22|type|22 0d 0a|";
    content:"form-data|3b 20|name=|22|on|22 0d 0a|";
    reference:url,twitter.com/James_inthe_box/status/1307025445536239616;
    reference:md5,852646191db6768157a7fddcc13afed2;
    classtype:trojan-activity;
    sid:2030894; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2020_09_21, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_21;
)