Techniques › T1548.005 › AN1107
AN1107 Analytic 1107
Office Suite · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Detection of ApplicationImpersonation role assignment or delegated mailbox access to service principals or rarely used users, especially outside of normal hours or geographic norms.</p>
- Detects
- T1548.005 Temporary Elevated Cloud Access
- Part of
- DET0393 Detection Strategy for Temporary Elevated Cloud Access Abuse (T1548.005)
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 or Set-ManagementRoleAssignment | DC0038 Application Log Content |
| m365:signinlogs | Unusual sign-in from service principal to user mailbox | DC0002 User Account Authentication |
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 |
|---|---|
TargetMailbox | Mailbox of interest where impersonation or access delegation occurs. |
UserAgent | Tune based on expected application or script-based mailbox access. |
GeoLocation | Restrict based on corporate geography or travel expectations. |