alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"URLhaus Known malware download URL detected (3803783)"; flow:established,from_client; http.method; content:"GET"; http.uri; content:"/shulpextechnology/calcbook/refs/heads/main/public/images/logo/calc_book_2.1.zip"; depth:80; endswith; nocase; http.host; content:"raw.githubusercontent.com"; depth:25; isdataat:!1,relative; metadata:created_at 2026_03_24; reference:url, urlhaus.abuse.ch/url/3803783/; classtype:trojan-activity; sid:84666883; rev:1;)