Suspicious EBS Snapshot Shared With External Account via CloudTrail

ATT&CK techniques

Defense Evasion → Exfiltration

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
- T1578.001Create Snapshot
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
- T1537Transfer Data to Cloud Account
Impact

What it detects

This rule detects ModifySnapshotAttribute events that add CREATE_VOLUME_PERMISSION for a specific external AWS account, sharing an EBS snapshot outside the owner account. Adversaries share a snapshot they created with an attacker-controlled account so they can restore the volume elsewhere and exfiltrate its data. Externally sharing a snapshot bypasses direct data reads and is a known cloud exfiltration technique.

Reporting behind it

Related detections9 linkedT1537 — drag to rearrange

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Suspicious EBS Snapshot Shared With External Account via CloudTrail

Pivot detection · T1537 · 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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