Suspicious SCATTERED SPIDER Exchange Transport Rule Creation to Suppress Alerts (via m365)
- Product
- m365
- Service
- exchange
- Author
- HuntRule
- Published
- 2026-09-13
- Updated
- 2026-09-13
ATT&CK techniques
Defense Evasion → CollectionRecon
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 creation or modification of Exchange Online transport rules. SCATTERED SPIDER created transport rules to delete or redirect security notification emails so that suspicious-activity alerts never reached defenders. Attacker-created mail-flow rules that hide alerting are a strong evasion signal.
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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Also included
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