Suspicious Exchange Inbox Forwarding Rule Creation via M365 (via m365)

ATT&CK techniques

Defense Evasion

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
- T1070.008Clear Mailbox Data
- T1564.008Email Hiding Rules
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects creation or modification of Exchange inbox rules that forward or silently delete messages, a hallmark of the Jingle Thief gift card fraud campaign. The actors hide fraud-related correspondence by auto-forwarding and moving sent items to Deleted Items. Detecting this rule change exposes mailbox manipulation used to conceal ongoing business email compromise.

Reporting behind it

Related detections9 linkedT1564.008 — drag to rearrange

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Suspicious Exchange Inbox Forwarding Rule Creation via M365 (via m365)

Pivot detection · T1564.008 · 9 related

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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