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AWS EC2 EBS Snapshot Shared or Made Public

Detects when an Amazon Elastic Block Store (EBS) snapshot is shared with another AWS account or made public. EBS snapshots contain copies of data volumes that may include sensitive or regulated information.…

Description

Detects when an Amazon Elastic Block Store (EBS) snapshot is shared with another AWS account or made public. EBS snapshots contain copies of data volumes that may include sensitive or regulated information. Adversaries may exploit ModifySnapshotAttribute to share snapshots with external accounts or the public, allowing them to copy and access data in an environment they control. This activity often precedes data exfiltration or persistence operations, where the attacker transfers stolen data out of the victim account or prepares a staging area for further exploitation.

Detection logic

Its licence does not clear it for publishing here

Sunturai publishes a detection's own text where the licence it arrived under has been reviewed and permits it, and Elastic License 2.0 has not. The query as its source wrote it, its canonical form and the hash that pins this revision are in the workspace record.

Detection requirements

Platform
IaaSOffice SuiteSaaS

The rule states no platform. This is derived from the ATT&CK technique it maps to.

Log source category
event_index

Known benign triggers

  • AMI sharing is a common practice in AWS environments. Ensure that the sharing is authorized before taking action.

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