ET MALWARE PowerShell/Agent.A DNS File Transfer CnC Beacon

alert udp $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE PowerShell/Agent.A DNS File Transfer CnC Beacon";
    content:"|01|"; offset:2; depth:1;
    content:"|00 01 00 00 00 00 00|"; distance:1; within:7;
    content:"00"; distance:1; within:2;
    content:"00000"; distance:0;
    pcre:"/^[0-9A-Z]+232A/R";
    content:"232A"; fast_pattern;
    reference:url,www.fireeye.com/blog/threat-research/2016/05/targeted_attacksaga.html;
    classtype:command-and-control;
    sid:2022837; rev:3;
    metadata:attack_target Client_Endpoint, created_at 2016_05_24, deployment Perimeter, confidence Medium, signature_severity Major, tag c2, updated_at 2019_10_08, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)