Techniques › T1564.008 › AN0551
AN0551 Analytic 0551
Windows · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Suspicious creation or modification of inbox rules through PowerShell (New-InboxRule, Set-InboxRule) to automatically delete, move, or hide emails. Defender perspective: unusual rule activity correlated with mailbox access and filtering patterns.</p>
- Detects
- T1564.008 Email Hiding Rules
- Part of
- DET0192 Detection Strategy for Email Hiding Rules
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 |
|---|---|---|
| WinEventLog:PowerShell | EventCode=4103, 4104, 4105, 4106 | DC0064 Command Execution |
| m365:unified | New-InboxRule or Set-InboxRule events recorded in Exchange Online | DC0038 Application Log Content |
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 |
|---|---|
SuspiciousKeywords | Keywords like 'phish', 'malware', 'suspicious' used in inbox rules to hide emails. |
UserContext | Scope mailbox monitoring to high-value users such as executives or admins. |