ET HUNTING Download file with BITS via LNK file (Likely Malicious)

Query · suricata

flow:established,from_server;
file_data;
content:"|4c 00 00 00|"; within:4;
content:"|00|b|00|i|00|t|00|s|00|a|00|d|00|m|00|i|00|n|00|"; nocase;
content:"|00|t|00|r|00|a|00|n|00|s|00|f|00|e|00|r|00|"; nocase;
Raw source ET HUNTING Download file with BITS via LNK file (Likely Malicious) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET HUNTING Download file with BITS via LNK file (Likely Malicious)";
    flow:established,from_server;
    file_data;
    content:"|4c 00 00 00|"; within:4;
    content:"|00|b|00|i|00|t|00|s|00|a|00|d|00|m|00|i|00|n|00|"; nocase;
    content:"|00|t|00|r|00|a|00|n|00|s|00|f|00|e|00|r|00|"; nocase;
    classtype:trojan-activity;
    sid:2021092; rev:2;
    metadata:created_at 2015_05_13, confidence Medium, signature_severity Major, updated_at 2019_07_26;
)

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