alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Malicious lnk Downloader Activity (GET)"; flow:established,to_server; http.request_line; content:"GET /joking.html HTTP/1.1"; fast_pattern; http.header_names; content:!"Referer"; http.user_agent; content:!"Linux"; content:!"Android"; http.host; content:".ru"; endswith; reference:md5,d6b182c825d961154b5415de1a061ae0; classtype:trojan-activity; sid:2035290; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_02_25, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_02_25, reviewed_at 2023_08_25;)