Techniques › T1213.005 › AN1566
AN1566 Analytic 1566
Office Suite · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Suspicious access to Microsoft Teams chat messages via eDiscovery, Graph API, or export methods after rare or compromised sign-in. Often associated with excessive file access, sensitive content review, or anomaly from expected user behavior.</p>
- Detects
- T1213.005 Messaging Applications
- Part of
- DET0567 Detecting Unauthorized Collection from Messaging Applications in SaaS and Office Environments
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 | TeamsMessagesAccessedViaEDiscovery, TeamsGraphMessageExport | DC0038 Application Log Content |
| m365:signinlogs | UserLoggedIn | DC0067 Logon Session Creation |
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 |
|---|---|
UserRole | Whether user is part of InfoSec, Legal, or expected to use Teams eDiscovery tools |
GeoRiskScore | Unusual country/IP sign-in patterns prior to Teams data export |
AccessVolume | Message or file threshold for triggering alert |