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

Query · suricata

flow:established,to_client;
http.response_body;
content:"|4c 00 00 00 01 14 02 00 00 00 00 00 c0 00 00 00 00 00 00 46 e9 40 00 00|"; fast_pattern;
pcre:"/^.*?(?:[\x09\x0a\x0b\x0c\x0d\x20]\x00){25,}/R";
target:dest_ip;
Raw source ET MALWARE 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 http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE Windows Shortcut Link Padded Whitespace in Command Line Arguments (ZDI-CAN-25373)";
    flow:established,to_client;
    http.response_body;
    content:"|4c 00 00 00 01 14 02 00 00 00 00 00 c0 00 00 00 00 00 00 46 e9 40 00 00|"; 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:attempted-user;
    sid:2060957; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2025_03_19, deployment Perimeter, deployment Internet, former_category HUNTING, confidence High, signature_severity Major, updated_at 2026_05_26;
    target:dest_ip;
)

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