Techniques › T1531 › AN0338
AN0338 Analytic 0338
Office Suite · attack.mitre.org · ATT&CK Enterprise v19.2
<p>O365 UnifiedAuditLog entries for Remove-Mailbox or Set-Mailbox with account disable or delete actions correlated with suspicious login locations or MFA bypass.</p>
- Detects
- T1531 Account Access Removal
- Part of
- DET0120 Account Access Removal via Multi-Platform Audit Correlation
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 | Remove-Mailbox, Set-Mailbox | DC0009 User Account Deletion |
| m365:signinlogs | Sign-in from anomalous location or impossible travel condition | 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 |
|---|---|
RoleAssignment | Determine if operation was delegated to expected admin group |
GeoThreshold | Trigger on unusual geographic login sources |
KEV CVEs whose mapped technique this analytic detects
| CVE | Vendor / product | State |
|---|---|---|
| CVE-2023-34362 | Progress MOVEit Transfer | Mapped |