ET MALWARE Anchor_DNS Trickbot DNS CnC Command - Receive Data

Query · suricata

content:"|00 00 00 00 00 00 32 38 42|"; fast_pattern;
dns.query;
content:"8B"; depth:2; nocase;
content:"B9."; nocase; distance:46; within:3;
pcre:"/^8b[a-fA-F0-9]{46}b9\./i";
Raw source ET MALWARE Anchor_DNS Trickbot DNS CnC Command - Receive Data · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert dns $HOME_NET any -> any any (
    msg:"ET MALWARE Anchor_DNS Trickbot DNS CnC Command - Receive Data";
    content:"|00 00 00 00 00 00 32 38 42|"; fast_pattern;
    dns.query;
    content:"8B"; depth:2; nocase;
    content:"B9."; nocase; distance:46; within:3;
    pcre:"/^8b[a-fA-F0-9]{46}b9\./i";
    reference:url,technical.nttsecurity.com/post/102fsp2/trickbot-variant-anchor-dns-communicating-over-dns;
    classtype:command-and-control;
    sid:2028882; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_10_21, deployment Perimeter, malware_family TrickBot, confidence Medium, signature_severity Major, tag Trickbot, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_15;
)

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