alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"URLhaus Known malware download URL detected (3803770)"; flow:established,from_client; http.method; content:"GET"; http.uri; content:"/shulpextechnology/calcbookbackend/refs/heads/main/models/calc_backend_book_3.8.zip"; depth:83; 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/3803770/; classtype:trojan-activity; sid:84666870; rev:1;)