Suspicious Exchange Deletion of MFA Notification Emails
- Product
- m365
- Service
- exchange
- Author
- HuntRule
- Published
- 2026-10-12
- Updated
- 2026-10-12
ATT&CK techniques
Defense EvasionRecon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule detects Exchange SoftDelete and HardDelete operations that ShinyHunters actors use to remove multi factor authentication change notifications from a victim mailbox. Attackers purge these alerts to hide account takeover and MFA tampering from the legitimate user.
Reporting behind it
Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.
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