alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win64/TrojanDownloader.Age Download Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".docx"; endswith; http.user_agent; content:"unknown"; fast_pattern; bsize:7; http.header_names; content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|"; content:!"Referer"; reference:md5,fd59dd7bb54210a99c1ed677bbfc03a8; classtype:trojan-activity; sid:2034048; rev:3; metadata:attack_target Client_Endpoint, created_at 2021_09_29, deployment Perimeter, malware_family Win64_TrojanDownloader_Age, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_09;)