ET MALWARE APT 41 LOWKEY Backdoor - Initalisation Bytes Received from CnC

Query · suricata

flow:established,from_server;
content:"|FF FF 01 00 00 01 00 00 00 00 00 00|"; startswith;
Raw source ET MALWARE APT 41 LOWKEY Backdoor - Initalisation Bytes Received from CnC · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $EXTERNAL_NET any -> $HOME_NET 53 (
    msg:"ET MALWARE APT 41 LOWKEY Backdoor - Initalisation Bytes Received from CnC";
    flow:established,from_server;
    content:"|FF FF 01 00 00 01 00 00 00 00 00 00|"; startswith;
    reference:url,www.mandiant.com/resources/blog/lowkey-hunting-missing-volume-serial-id;
    classtype:command-and-control;
    sid:2028863; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2019_10_16, deployment Perimeter, malware_family LOWKEY, performance_impact Low, confidence High, signature_severity Major, tag APT41, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_06_02;
)

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