Suspicious Inbox Manipulation Rules

Title: Suspicious Inbox Manipulation Rules
Status: test
Description:Detects suspicious rules that delete or move messages or folders are set on a user's inbox.
References:
  -https://learn.microsoft.com/en-us/entra/id-protection/concept-identity-protection-risks#suspicious-inbox-manipulation-rules
  -https://learn.microsoft.com/en-us/entra/architecture/security-operations-user-accounts#unusual-sign-ins
Author: Mark Morowczynski '@markmorow', Gloria Lee, '@gleeiamglo'
Date: 2023-09-03
modified:None
Tags:

• -'attack.stealth'
• -'attack.t1140'

Logsource:

• product: azure
• service: riskdetection

Detection:
  selection:
    riskEventType: 'mcasSuspiciousInboxManipulationRules'
  condition:selection
Falsepositives:
  -Actual mailbox rules that are moving items based on their workflow.
Level: high