alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"URLhaus Known malware download URL detected (3890496)"; flow:established,from_client; http.method; content:"GET"; http.uri; content:"/avast_update"; depth:13; endswith; nocase; http.host; content:"sail-sham-step.xyz"; depth:18; isdataat:!1,relative; metadata:created_at 2026_07_23; reference:url, urlhaus.abuse.ch/url/3890496/; classtype:trojan-activity; sid:84753596; rev:1;)