alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32.Renos/Artro Trojan Checkin M1"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php?"; content:"=v"; pcre:"/\.php\?[^=]+=v\d{2}[0-9A-Za-z\/\+]+==$/"; http.user_agent; content:"wget"; nocase; fast_pattern; http.request_body; content:"data="; startswith; pcre:"/^data=(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/"; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; reference:md5,01ca25570659c2e1b8b887a3229ef421; reference:url,www.microsoft.com/security/portal/Threat/Encyclopedia/Entry.aspx?name=TROJANDOWNLOADER%3aWIN32/RENOS.MJ; reference:url,www.securelist.com/en/analysis/204792172/The_Advertising_Botnet; classtype:command-and-control; sid:2013186; rev:23; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2011_01_13, deployment Perimeter, signature_severity Major, updated_at 2024_04_20;)