Techniques › T1098.002 › AN1051
AN1051 Analytic 1051
Office Suite · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Detection of anomalous or unauthorized mailbox delegation activity (e.g., Add-MailboxPermission, Default/Anonymous mailbox permissions, Gmail delegation setup).</p>
- Detects
- T1098.002 Additional Email Delegate Permissions
- Part of
- DET0373 Detection Strategy for Addition of Email Delegate Permissions
Log sources and channels
Exactly as MITRE states them in x_mitre_log_source_references. Where a channel is vague, it is vague in the source; kevmap does not tidy it.
| Log source | Channel | Data component |
|---|---|---|
| m365:unified | Add-MailboxPermission, UpdateFolderPermissions | DC0010 User Account Modification |
Mutable elements
Parameters MITRE marks as environment-specific. These are the knobs you are expected to tune; they are why an analytic is not a rule.
| Field | Description |
|---|---|
DelegatePermissionLevel | Threshold for unexpected delegate roles such as FullAccess or SendAs. |
FolderTargetScope | Mailbox folder targeted by delegation (Inbox, Root, Calendar, etc.). |
DelegatorToDelegatePairing | Pairings of delegate and delegator users that are expected. |
MailflowAnomalyThreshold | Spike in outbound mail after delegate addition, used to catch phishing or mass exfil. |