Suspicious EC2 EBS Snapshot Shared to External AWS Account (via cloudtrail)

ATT&CK techniques

Exfiltration

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

What it detects

This rule detects an EC2 ModifySnapshotAttribute call that adds create-volume permission to an EBS snapshot, the technique attackers use to share disk snapshots to an external AWS account for exfiltration. Sharing snapshots externally exports full volume contents outside the victim account. Detecting create-volume-permission additions surfaces cloud data theft via snapshot sharing.

Reporting behind it

Related detections9 linkedT1537 — drag to rearrange

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Suspicious EC2 Snapshot Attribute Modification for External Sharing via CloudTrail

Suspicious Cross-Project Compute Snapshot Creation via GCP Audit

Suspicious Compute Disk IAM Policy Modification Granting Owner Role via GCP Audit

Suspicious EBS Snapshot Shared With External Account via CloudTrail

Suspicious EC2 EBS Snapshot Shared to External AWS 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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