alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Linux/Tsunami Downloader"; flow:established,to_server; http.method; content:"GET"; http.uri; bsize:7; content:"/.x/"; startswith; fast_pattern; content:"sh"; endswith; pcre:"/^\/\.x\/\dsh$/U"; http.user_agent; content:"Wget"; startswith; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; classtype:trojan-activity; sid:2034683; rev:5; metadata:affected_product Linux, attack_target Client_Endpoint, created_at 2021_12_13, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_30;)