ET MALWARE BB Trojan Communication Protocol detected

Query · suricata

flow:established,to_server;
content:"|01 00 00 00|"; offset:4; depth:4;
content:"|01 04 01 00 00|"; distance:8; within:5;
target:src_ip;
Raw source ET MALWARE BB Trojan Communication Protocol detected · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (
    msg:"ET MALWARE BB Trojan Communication Protocol detected";
    flow:established,to_server;
    content:"|01 00 00 00|"; offset:4; depth:4;
    content:"|01 04 01 00 00|"; distance:8; within:5;
    reference:url,www.commandfive.com/papers/C5_APT_C2InTheFifthDomain.pdf;
    classtype:trojan-activity;
    sid:2014227; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, tls_state plaintext, created_at 2012_02_14, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_12_05;
    target:src_ip;
)

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