ET MALWARE ArrobarLoader CnC Checkin M1

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE ArrobarLoader CnC Checkin M1";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".php";
    http.user_agent;
    content:"4RR0B4R 4 X0T4 D4 TU4 M4E"; fast_pattern;
    http.request_body;
    content:"0"; endswith;
    http.header_names;
    content:!"Referer";
    content:!"Cache";
    reference:md5,3d7436bcf635a7e56a785c9d26ed3767;
    classtype:command-and-control;
    sid:2026528; rev:5;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_02_07, deployment Perimeter, malware_family ArrobarLoader, performance_impact Low, confidence High, signature_severity Major, tag Loader, updated_at 2020_09_16;
)