alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE ELF/DarkNexus User-Agent"; flow:established,to_server; http.user_agent; content:"checker/v"; fast_pattern; startswith; content:"/p"; distance:0; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; reference:md5,81150784e5cef98bf6e56638da5fe5f3; classtype:trojan-activity; sid:2032895; rev:3; metadata:affected_product Linux, affected_product IoT, attack_target Client_Endpoint, created_at 2021_05_03, deployment Perimeter, malware_family ELF_DarkNexus, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_20;)