okta_user_password_and_mfa_factor_reset_or_deactivated

rule okta_user_password_and_mfa_factor_reset_or_deactivated {

  meta:
    author = "Drew Pilarski - Tempus AI"
    description = "Detects when an Okta user's password is reset and MFA factor(s) are deactivated or reset within a 30 minute time window. This activity may indicate that the user account has been compromised."
    rule_id = "mr_a4344fef-2310-4fed-8f3a-8e76237cfc1f"
    rule_name = "Okta User Password and MFA Factor Reset or Deactivated"
    reference = "https://developer.okta.com/docs/reference/api/event-types/"
    mitre_attack_tactic = "Credential Access, Defense Evasion, Persistence"
    mitre_attack_technique = "Modify Authentication Process: Multi-Factor Authentication"
    mitre_attack_url = "https://attack.mitre.org/techniques/T1556/006/"
    type = "Alert"
    platform = "Okta"
    data_source = "Okta"
    severity = "Medium"
    priority = "Medium"

  events:
    $pw.metadata.product_name = "Okta"
    $pw.metadata.vendor_name = "Okta"
    (
        $pw.metadata.product_event_type = "user.mfa.factor.reset_all" OR
        $pw.metadata.product_event_type = "user.mfa.factor.deactivate"
    )

    $user_id = $pw.target.user.product_object_id

    $mfa.metadata.product_name = "Okta"
    $mfa.metadata.vendor_name = "Okta"
    $mfa.metadata.product_event_type = "user.account.reset_password"

    $user_id = $mfa.target.user.product_object_id

    match:
      $user_id over 30m

  outcome:
    $principal_user_email = array_distinct($pw.principal.user.email_addresses)
    $principal_ip = array_distinct($pw.principal.ip)
    $risk_score = 65
    $mitre_attack_tactic = array_distinct("Credential Access, Defense Evasion, Persistence")
    $mitre_attack_technique = array_distinct("Modify Authentication Process: Multi-Factor Authentication")
    $mitre_attack_technique_id = array_distinct("T1556.006")

  condition:
    $pw and $mfa
}