ET MALWARE FrameworkPOS Covert DNS CnC Beacon 1

Query · suricata

content:"|01|"; offset:2; depth:1;
content:"|00 01 00 00 00 00 00|"; distance:1; within:7;
content:"dc"; nocase; distance:7;
content:"|06|beacon"; nocase; offset:12; fast_pattern;
pcre:"/^[\x0e-\x1e](?:[a-f0-9]{2}){1,3}(?:dc(?:[a-f0-9]{2}){1,3}){3}.[a-f0-9]{2}/Ri";
Raw source ET MALWARE FrameworkPOS Covert DNS CnC Beacon 1 · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert udp $HOME_NET any -> any 53 (
    msg:"ET MALWARE FrameworkPOS Covert DNS CnC Beacon 1";
    content:"|01|"; offset:2; depth:1;
    content:"|00 01 00 00 00 00 00|"; distance:1; within:7;
    content:"dc"; nocase; distance:7;
    content:"|06|beacon"; nocase; offset:12; fast_pattern;
    pcre:"/^[\x0e-\x1e](?:[a-f0-9]{2}){1,3}(?:dc(?:[a-f0-9]{2}){1,3}){3}.[a-f0-9]{2}/Ri";
    reference:md5,a5dc57aea5f397c2313e127a6e01aa00;
    reference:url,blog.gdatasoftware.com/blog/article/new-frameworkpos-variant-exfiltrates-data-via-dns-requests.html;
    classtype:command-and-control;
    sid:2019454; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2014_10_16, deployment Perimeter, confidence Medium, signature_severity Major, tag c2, updated_at 2019_08_29, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)

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