ET MALWARE CobaltStrike DNS Beacon Response

Query · suricata

content:"|81 80 00 01 00 01 00 00 00 00|"; offset:2; depth:10;
content:"|c0 0c 00 01 00 01 00 00 00 00 00 04 00 00 00 00|"; endswith;
threshold:type both, count 10, seconds 90, track by_dst;
content:!"|06|nessus|03|org";
content:!"trr|03|dns|07|nextdns|02|io";
content:!"|08|cloudapp|03|net";
Raw source ET MALWARE CobaltStrike DNS Beacon Response · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert udp $EXTERNAL_NET 53 -> $HOME_NET any (
    msg:"ET MALWARE CobaltStrike DNS Beacon Response";
    content:"|81 80 00 01 00 01 00 00 00 00|"; offset:2; depth:10;
    content:"|c0 0c 00 01 00 01 00 00 00 00 00 04 00 00 00 00|"; endswith;
    threshold:type both, count 10, seconds 90, track by_dst;
    content:!"|06|nessus|03|org";
    content:!"trr|03|dns|07|nextdns|02|io";
    content:!"|08|cloudapp|03|net";
    reference:url,www.youtube.com/watch?v=zAB5G-QOyx8;
    classtype:targeted-activity;
    sid:2026040; rev:9;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_08_28, deployment Perimeter, malware_family Cobalt_Strike, confidence High, signature_severity Major, tag c2, updated_at 2022_03_05, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)

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