ET MALWARE Kimsuky Related Malicious VBScript Inbound M4

alert ftp-data $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE Kimsuky Related Malicious VBScript Inbound M4";
    flow:established,to_client;
    content:"CreateObject(|22|WScript.Shell|22|)";
    content:"open"; nocase;
    content:"GET"; distance:0; within:10;
    content:".php?dhk="; fast_pattern;
    content:"&user=";
    content:"&fore=";
    reference:url,github.com/eset/malware-ioc/tree/master/kimsuky/hotdoge_donutcat_case;
    classtype:trojan-activity;
    sid:2034694; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_12_13, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_12_13;
)