alert tcp $HOME_NET any -> $EXTERNAL_NET [25,587] (msg:"ET MALWARE Infostealer.Bancos Checkin via SMTP"; flow:to_server,established; content:"Subject|3a 20|"; content:"Foi Instalado"; nocase; fast_pattern; pcre:"/^Subject\x3a [^\r\n]+?Foi Instalado/mi"; reference:md5,7f5709c924bb1417a180a4fa8311a2e9; classtype:command-and-control; sid:2018646; rev:2; metadata:created_at 2014_07_07, malware_family Bancos, signature_severity Major, tag Banking_Trojan, updated_at 2019_10_08;)