alert tcp $HOME_NET any -> $EXTERNAL_NET [25,587] (msg:"ET MALWARE HawkEye Keylogger Report SMTP"; flow:established,to_server; content:"From|3a|"; nocase; content:"Subject|3a| HawkEye Keylogger"; nocase; reference:md5,3bbd5ae250b2d912a701f8d74d85353b; classtype:trojan-activity; sid:2019926; rev:1; metadata:created_at 2014_12_13, signature_severity Major, updated_at 2019_07_26;)