alert tcp $HOME_NET any -> $EXTERNAL_NET [25,587] (msg:"ET MALWARE Trojan/Win32.Espy Report via SMTP"; flow:established,to_server; content:"From|3a|"; nocase; content:"SUBJECT|3a| I Q - S P Y KeyLogger ["; content:"victim computer name"; reference:md5,1a9a06b11aa537734931f8098bae6b00; classtype:trojan-activity; sid:2019932; rev:1; metadata:created_at 2014_12_13, signature_severity Major, updated_at 2019_07_26;)