ET MALWARE Malicious Notepad++ Update Deployment URL (install.exe)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.host;
pcre:"/^(?:\d{1,3}\.){3}\d{1,3}$/";
http.uri;
content:"/update/install.exe"; nocase; fast_pattern; endswith;
Raw source ET MALWARE Malicious Notepad++ Update Deployment URL (install.exe) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Malicious Notepad++ Update Deployment URL (install.exe)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.host;
    pcre:"/^(?:\d{1,3}\.){3}\d{1,3}$/";
    http.uri;
    content:"/update/install.exe"; nocase; fast_pattern; endswith;
    reference:url,securelist.com/notepad-supply-chain-attack/118708/;
    classtype:trojan-activity;
    sid:2067300; rev:1;
    metadata:affected_product Notepad__, attack_target Client_Endpoint, created_at 2026_02_04, deployment Perimeter, confidence Medium, signature_severity Critical, updated_at 2026_02_04;
)

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