ET MALWARE Skeleton Key Filename in SMB Traffic (ASCII)

Query · suricata

flow:to_server,established;
content:"|FF|SMB|a2|"; offset:4; depth:5;
byte_test:1,!&,0x80,6,relative;
content:"|5c|msuta64.dll";
Raw source ET MALWARE Skeleton Key Filename in SMB Traffic (ASCII) · 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 -> $HOME_NET [139,445] (
    msg:"ET MALWARE Skeleton Key Filename in SMB Traffic (ASCII)";
    flow:to_server,established;
    content:"|FF|SMB|a2|"; offset:4; depth:5;
    byte_test:1,!&,0x80,6,relative;
    content:"|5c|msuta64.dll";
    reference:url,www.secureworks.com/cyber-threat-intelligence/threats/skeleton-key-malware-analysis;
    classtype:trojan-activity;
    sid:2020173; rev:2;
    metadata:created_at 2015_01_13, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;
)

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