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Outlook Task/Note Reminder Received

Detects changes to the registry values related to outlook that indicates that a reminder was triggered for a Note or Task item. This could be a sign of exploitation of CVE-2023-23397. Further investigation is required to determine the success of an exploitation.

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Detection Logic

{
  "selection": {
    "TargetObject
| contains
| all": [
      "\\SOFTWARE\\Microsoft\\Office\\",
      "\\Outlook\\"
    ],
    "TargetObject
| contains": [
      "\\Tasks\\",
      "\\Notes\\"
    ]
  },
  "condition": "selection"
}

False Positives

⚠ Legitimate reminders received for a task or a note will also trigger this rule.

Field Validations

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