ET MALWARE Possible Tinba DGA NXDOMAIN Responses

Query · suricata

byte_test:1,&,128,2;
byte_test:1,&,1,3;
byte_test:1,&,2,3;
content:"|00 01 00 00 00 01|"; offset:4; depth:6;
content:"|03|com"; distance:15; within:4; fast_pattern;
content:"|0c|"; distance:-17; within:1;
pcre:"/^[a-z]{12}/R";
threshold:type both, track by_src, count 50, seconds 10;
content:!"|08|sophosxl|03|";
Raw source ET MALWARE Possible Tinba DGA NXDOMAIN Responses · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert udp any 53 -> $HOME_NET any (
    msg:"ET MALWARE Possible Tinba DGA NXDOMAIN Responses";
    byte_test:1,&,128,2;
    byte_test:1,&,1,3;
    byte_test:1,&,2,3;
    content:"|00 01 00 00 00 01|"; offset:4; depth:6;
    content:"|03|com"; distance:15; within:4; fast_pattern;
    content:"|0c|"; distance:-17; within:1;
    pcre:"/^[a-z]{12}/R";
    threshold:type both, track by_src, count 50, seconds 10;
    content:!"|08|sophosxl|03|";
    reference:md5,1044af21a7c4cbc291ab418a47de52b4;
    reference:url,seculert.com/blog/2014/09/tiny-tinba-trojan-could-pose-big-threat.html;
    reference:url,garage4hackers.com/entry.php?b=3086;
    classtype:trojan-activity;
    sid:2019230; rev:2;
    metadata:created_at 2014_09_24, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;
)

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