ET HUNTING Windows Shortcut Link Padded Whitespace in Command Line Arguments (ZDI-CAN-25373)

Query · suricata

flow:established,to_client;
file.data;
content:"|4c 00 00 00 01 14 02 00 00 00 00 00 c0 00 00 00 00 00 00 46|"; fast_pattern;
pcre:"/^.*?(?:[\x09\x0a\x0b\x0c\x0d\x20]\x00){25,}/R";
target:dest_ip;
Raw source ET HUNTING Windows Shortcut Link Padded Whitespace in Command Line Arguments (ZDI-CAN-25373) · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp any any -> $HOME_NET any (
    msg:"ET HUNTING Windows Shortcut Link Padded Whitespace in Command Line Arguments (ZDI-CAN-25373)";
    flow:established,to_client;
    file.data;
    content:"|4c 00 00 00 01 14 02 00 00 00 00 00 c0 00 00 00 00 00 00 46|"; fast_pattern;
    pcre:"/^.*?(?:[\x09\x0a\x0b\x0c\x0d\x20]\x00){25,}/R";
    reference:url,www.trendmicro.com/en_us/research/25/c/windows-shortcut-zero-day-exploit.html;
    classtype:misc-activity;
    sid:2065198; rev:1;
    metadata:created_at 2025_10_15, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, updated_at 2025_10_15;
    target:dest_ip;
)

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