alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"URLhaus Known malware download URL detected (3851859)"; flow:established,from_client; http.method; content:"GET"; http.uri; content:"/chk"; depth:4; endswith; nocase; http.host; content:"winter-pulse.christmas"; depth:22; isdataat:!1,relative; metadata:created_at 2026_05_22; reference:url, urlhaus.abuse.ch/url/3851859/; classtype:trojan-activity; sid:84714959; rev:1;)