possible_data_exfiltration_via_smtp

rule possible_data_exfiltration_via_smtp {
 meta:
    author = "Joseph Kamau"
    description = "This rule detects when a process initiates an smtp connection, most keylogger variant use smtp to exfiltrate the keystrokes collected..eg hawkeye, agent tesla  License: https://github.com/Neo23x0/sigma/blob/master/LICENSE.Detection.Rules.md."
    reference = "https://tdm.socprime.com/tdm/info/ONtNVVYdHkcz"
    version = "0.01"
    created = "2021-03-09"
    product = "windows"
    service = "sysmon"
    mitre = "exfiltration, t1048"

  events:
($selection.metadata.product_event_type = "3" and ($selection.target.port = "587" or $selection.target.port = "465"))

  condition:
    $selection
}