alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Tibs Trojan Downloader"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"?dn"; nocase; content:"&flrdr="; fast_pattern; nocase; content:"&nxte="; nocase; http.header_names; content:!"User-Agent|0d 0a|"; classtype:trojan-activity; sid:2008639; rev:8; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2010_07_30, deployment Perimeter, signature_severity Major, tag Trojan_Downloader, updated_at 2020_09_13;)