ET EXPLOIT_KIT Download file with Powershell via LNK file (observed in Sundown EK)

Query · suricata

flow:established,from_server;
file_data;
content:"|4c 00 00 00|"; within:4;
content:"c|00|m|00|d|00|.|00|e|00|x|00|e"; nocase;
content:"P|00|o|00|w|00|e|00|r|00|S|00|h|00|e|00|l|00|l"; nocase;
content:"D|00|o|00|w|00|n|00|l|00|o|00|a|00|d|00|F|00|i|00|l|00|e"; nocase;
Raw source ET EXPLOIT_KIT Download file with Powershell via LNK file (observed in Sundown EK) · 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 EXPLOIT_KIT Download file with Powershell via LNK file (observed in Sundown EK)";
    flow:established,from_server;
    file_data;
    content:"|4c 00 00 00|"; within:4;
    content:"c|00|m|00|d|00|.|00|e|00|x|00|e"; nocase;
    content:"P|00|o|00|w|00|e|00|r|00|S|00|h|00|e|00|l|00|l"; nocase;
    content:"D|00|o|00|w|00|n|00|l|00|o|00|a|00|d|00|F|00|i|00|l|00|e"; nocase;
    classtype:exploit-kit;
    sid:2020987; rev:2;
    metadata:created_at 2015_04_24, signature_severity Major, updated_at 2019_07_26;
)

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